{"title":"Barlows \u0026 Focal Extenders","description":"","products":[{"product_id":"2x-powermate-2-pmt-2200","title":"Tele Vue 2x Powermate - 2\" - PMT-2200","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 2x Powermate - 2\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eTo understand the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e, we must first understand the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e. Barlows amplify the power of a \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e. They can be considered \"focal reducers\" for eyepieces, or \"focal extenders\" for objectives. Terence Dickenson, in his Barlow test report in \u003ci\u003eSky and Telescope\u003c\/i\u003e, says: \"Technology has erased the old objections. A modern Barlow will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e and their clones have built-in Barlows, ample evidence that the lens is not some detrimental intruder.\" Thanks, Terence, for laying the myth of the degrading Barlow to rest.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA high quality \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e must be properly designed and manufactured in order to avoid compromising a \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s color and spherical aberration corrections. The \"invisibility\" of Tele Vue'''s 2-element Barlows has been noted in test reports in the astronomy magazines. However, by the nature of its negative power lens, a Barlow will do more than just increase magnification, regardless of the number of elements.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe diverging rays leaving the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e result in moving the exit pupil further out, thereby extending the eye relief. In short to medium focal length eyepieces the change is not noticeable. However, in the case of long focal length \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\"\u003etelescope eyepiece\u003c\/a\u003e, the increase can be significant and not without performance consequences.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVignetting can occur due to the altered ray path, when the \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\"\u003etelescope eyepiece\u003c\/a\u003e'''s lenses are not large enough in diameter to allow all the rays to make it through. Shorter Barlows, or ones with too much magnification, only exacerbate the problem because the ray path entering the eyepiece is steeper.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTeleVue had to go beyond the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept to achieve the goal of a compact, high power, fully corrected image amplifier. The \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e consists of a negative doublet plus a positive \"pupil-correcting\" doublet. This 4-element system provides the magnifying function of a Barlow without its limitations by restoring the field rays back to their original direction, as if the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e were not there. The result is a pure magnification increase.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"While Barlows are powerful tools, the negative element defining them also limits their ability. The simple negative element \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e increases eyepiece eye-relief. With short focal length eyepieces the effect is negligible. However, on long focal length eyepieces the exit pupil position moves well beyond the designer'''s intended position, resulting in vignetting with many \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\"\u003etelescope eyepiece\u003c\/a\u003e. This is why \"Shorty\" Barlows in particular, with their strong negative element often vignette and degrade long focus eyepieces. My 4-element form picks up where the Barlow concept can go no further. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e is a technically universal solution, using a positive field lens to redirect field rays. The result is an exit pupil that stays where the eyepiece designer intended. With freedom from aberrations, greater magnification potential, and compact size, I hope you'''ll agree \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e raises the standard for image amplification.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don'''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2x Powermate - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eTelecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh performance for image amplification, CCD or film.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigher magnifications are possible with high optical performance compared to \"doubling up\" Barlows.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll will reach parfocal point in star diagonals, except for the 2\", 2x which comes very close.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIn addition to full multi-coating, Powermates include other Tele Vue special touches such as safety undercuts where practical on the chrome barrel and captive lock screws that can'''t fall out, and filter threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2x Powermate - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: 2X Powermate\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\"\u003c\/p\u003e\n\u003cp\u003eWeight: 1.20 lbs.\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: PMT-2200\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552423617,"sku":"TEL-PMT-2200","price":543.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/482-1-thumb.jpeg?v=1776459323"},{"product_id":"2-5x-powermate-1-25-pmt-2513","title":"Tele Vue 2.5X Powermate - 1.25\" - PMT-2513","description":"\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 2.5X Powermate - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eTo understand the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e, we must first understand the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e. Barlows amplify the power of a telescope. They can be considered \"focal reducers\" for eyepieces, or \"focal extenders\" for objectives. Terence Dickenson, in his Barlow test report in \u003ci\u003eSky and Telescope\u003c\/i\u003e, says: \"Technology has erased the old objections. A modern Barlow will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e and their clones have built-in Barlows, ample evidence that the lens is not some detrimental intruder.\" Thanks, Terence, for laying the myth of the degrading \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e to rest.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA high quality \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e must be properly designed and manufactured in order to avoid compromising a \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s color and spherical aberration corrections. The \"invisibility\" of Tele Vue'''s 2-element Barlows has been noted in test reports in the astronomy magazines. However, by the nature of its negative power lens, a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will do more than just increase magnification, regardless of the number of elements.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe diverging rays leaving the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e result in moving the exit pupil further out, thereby extending the eye relief. In short to medium focal length eyepieces the change is not noticeable. However, in the case of long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e, the increase can be significant and not without performance consequences.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVignetting can occur due to the altered ray path, when the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e'''s lenses are not large enough in diameter to allow all the rays to make it through. Shorter Barlows, or ones with too much magnification, only exacerbate the problem because the ray path entering the eyepiece is steeper.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTeleVue had to go beyond the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate consists of a negative doublet plus a positive \"pupil-correcting\" doublet. This 4-element system provides the magnifying function of a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e without its limitations by restoring the field rays back to their original direction, as if the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e were not there. The result is a pure magnification increase.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"While \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e are powerful tools, the negative element defining them also limits their ability. The simple negative element Barlow increases eyepiece eye-relief. With short focal length eyepieces the effect is negligible. However, on long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e the exit pupil position moves well beyond the designer'''s intended position, resulting in vignetting with many eyepieces. This is why \"Shorty\" Barlows in particular, with their strong negative element often vignette and degrade long focus eyepieces. My 4-element form picks up where the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept can go no further. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e is a technically universal solution, using a positive field lens to redirect field rays. The result is an exit pupil that stays where the eyepiece designer intended. With freedom from aberrations, greater magnification potential, and compact size, I hope you'''ll agree \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e raises the standard for image amplification.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don'''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2.5X Powermate - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eTelecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh performance for image amplification, CCD or film.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigher magnifications are possible with high optical performance compared to \"doubling up\" Barlows.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll will reach parfocal point in star diagonals, except for the 2\", 2x which comes very close.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIn addition to full multi-coating, Powermates include other Tele Vue special touches such as safety undercuts where practical on the chrome barrel and captive lock screws that can'''t fall out, and filter threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2.5X Powermate - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: 2.5X Powermate\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eWeight: 0.45 lbs.\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: PMT-2513\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552424065,"sku":"TEL-PMT-2513","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/Powermate_right.jpeg?v=1776459188"},{"product_id":"4x-powermate-2-pmt-4201","title":"Tele Vue 4X Powermate - 2\" - PMT-4201","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 4X Powermate - 2\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eTo understand the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e, we must first understand the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e. Barlows amplify the power of a telescope. They can be considered \"focal reducers\" for eyepieces, or \"focal extenders\" for objectives. Terence Dickenson, in his Barlow test report in \u003ci\u003eSky and Telescope\u003c\/i\u003e, says: \"Technology has erased the old objections. A modern Barlow will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e and their clones have built-in Barlows, ample evidence that the lens is not some detrimental intruder.\" Thanks, Terence, for laying the myth of the degrading \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e to rest.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA high quality \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e must be properly designed and manufactured in order to avoid compromising a \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s color and spherical aberration corrections. The \"invisibility\" of Tele Vue'''s 2-element Barlows has been noted in test reports in the astronomy magazines. However, by the nature of its negative power lens, a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will do more than just increase magnification, regardless of the number of elements.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe diverging rays leaving the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e result in moving the exit pupil further out, thereby extending the eye relief. In short to medium focal length eyepieces the change is not noticeable. However, in the case of long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e, the increase can be significant and not without performance consequences.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVignetting can occur due to the altered ray path, when the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e'''s lenses are not large enough in diameter to allow all the rays to make it through. Shorter Barlows, or ones with too much magnification, only exacerbate the problem because the ray path entering the eyepiece is steeper.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTeleVue had to go beyond the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate consists of a negative doublet plus a positive \"pupil-correcting\" doublet. This 4-element system provides the magnifying function of a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e without its limitations by restoring the field rays back to their original direction, as if the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e were not there. The result is a pure magnification increase.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"While \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e are powerful tools, the negative element defining them also limits their ability. The simple negative element Barlow increases eyepiece eye-relief. With short focal length eyepieces the effect is negligible. However, on long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e the exit pupil position moves well beyond the designer'''s intended position, resulting in vignetting with many eyepieces. This is why \"Shorty\" Barlows in particular, with their strong negative element often vignette and degrade long focus eyepieces. My 4-element form picks up where the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept can go no further. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e is a technically universal solution, using a positive field lens to redirect field rays. The result is an exit pupil that stays where the eyepiece designer intended. With freedom from aberrations, greater magnification potential, and compact size, I hope you'''ll agree \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e raises the standard for image amplification.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don'''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 4X Powermate - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eTelecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh performance for image amplification, CCD or film.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigher magnifications are possible with high optical performance compared to \"doubling up\" Barlows.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll will reach parfocal point in star diagonals, except for the 2\", 2x which comes very close.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIn addition to full multi-coating, Powermates include other Tele Vue special touches such as safety undercuts where practical on the chrome barrel and captive lock screws that can''t fall out, and filter threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 4X Powermate - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: 4X Powermate\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\"\u003c\/p\u003e\n\u003cp\u003eWeight: 1.20 lbs.\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: PMT-4201\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552424769,"sku":"TEL-PMT-4201","price":554.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/tele-vue-4x-powermate_2_inch.jpg?v=1776459327"},{"product_id":"5x-powermate-1-25-pmt-5126","title":"Tele Vue 5X Powermate - 1.25\" - PMT-5126","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 5X Powermate - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eTo understand the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e, we must first understand the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e. Barlows amplify the power of a telescope. They can be considered \"focal reducers\" for eyepieces, or \"focal extenders\" for objectives. Terence Dickenson, in his Barlow test report in \u003ci\u003eSky and Telescope\u003c\/i\u003e says: \"Technology has erased the old objections. A modern Barlow will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e and their clones have built-in Barlows, ample evidence that the lens is not some detrimental intruder.\" Thanks, Terence, for laying the myth of the degrading \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e to rest.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA high quality \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e must be properly designed and manufactured in order to avoid compromising a \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s color and spherical aberration corrections. The \"invisibility\" of Tele Vue''s 2-element Barlows has been noted in test reports in the astronomy magazines. However, by the nature of its negative power lens, a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will do more than just increase magnification, regardless of the number of elements.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe diverging rays leaving the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e result in moving the exit pupil further out, thereby extending the eye relief. In short to medium focal length eyepieces the change is not noticeable. However, in the case of long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e, the increase can be significant and not without performance consequences.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVignetting can occur due to the altered ray path, when the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e''s lenses are not large enough in diameter to allow all the rays to make it through. Shorter Barlows, or ones with too much magnification, only exacerbate the problem because the ray path entering the eyepiece is steeper.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTeleVue had to go beyond the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate consists of a negative doublet plus a positive \"pupil-correcting\" doublet. This 4-element system provides the magnifying function of a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e without its limitations by restoring the field rays back to their original direction, as if the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e were not there. The result is a pure magnification increase.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"While \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e are powerful tools, the negative element defining them also limits their ability. The simple negative element Barlow increases eyepiece eye-relief. With short focal length eyepieces the effect is negligible. However, on long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e the exit pupil position moves well beyond the designer''s intended position, resulting in vignetting with many eyepieces. This is why \"Shorty\" Barlows in particular, with their strong negative element often vignette and degrade long focus eyepieces. My 4-element form picks up where the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept can go no further. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e is a technically universal solution, using a positive field lens to redirect field rays. The result is an exit pupil that stays where the eyepiece designer intended. With freedom from aberrations, greater magnification potential, and compact size, I hope you''ll agree \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e raises the standard for image amplification.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 5X Powermate - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eTelecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh performance for image amplification, CCD or film.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigher magnifications are possible with high optical performance compared to \"doubling up\" Barlows.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll will reach parfocal point in star diagonals, except for the 2\", 2x which comes very close.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIn addition to full multi-coating, Powermates include other Tele Vue special touches such as safety undercuts where practical on the chrome barrel and captive lock screws that can''t fall out, and filter threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 5X Powermate - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: 5X Powermate\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eWeight: 0.40 lbs.\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: PMT-5126\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552425089,"sku":"TEL-PMT-5126","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/485-1-thumb.jpeg?v=1776459271"},{"product_id":"2x-barlow-1-25-blw-2125","title":"Tele Vue 2X Barlow - 1.25\" - BLW-2125","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 2X Barlow - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eProperly designed \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eBarlow lenses\u003c\/a\u003e do wonderful things: They amplify power, slow the \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescope\u003c\/a\u003e''s f\/# (improving eyepiece sharpness), and give designers the opportunity to compensate for \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003etelescope eyepiece\u003c\/a\u003e aberrations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTele Vue Barlow Lenses\u003c\/b\u003e use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f\/4 \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescope\u003c\/a\u003e. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Barlow Lenses\u003c\/a\u003e even improve our competitor''s \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003etelescope eyepieces\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescopes\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"I originally designed the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Barlow Lens\u003c\/a\u003e line to complement the high performance of our \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e. Only 2 elements of high index glass were required to reduce all aberrations to well below the airy disc in an f\/4 system. It has taken a good 15 years, but I think we''re finally laying to rest the popular myth of the \"degrading Barlow.\" In a 1997 Sky \u0026amp; Telescope review, Terrence Dickenson wrote \"...Technology has erased the old objections. A modern \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eBarlow lens\u003c\/a\u003e will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescope\u003c\/a\u003e''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e and their clones have built-in Barlows - ample evidence that the lens is not some detrimental intruder.\" Thanks Terry, I couldn''t agree more.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\" target=\"blank\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\" target=\"blank\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\" target=\"blank\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2X Barlow - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduct design and execution deliver consummate satisfaction\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFeatures include parfocal-ization, 1.25\" filter threads, captive lock screws that won''t fall out and full multicoatings\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEvery Tele Vue Barlow must pass the same rigorous f\/4, full field testing as all their eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2X Barlow - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eOptics Type: 2X Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Full multi-coatings\u003c\/p\u003e\n\u003cp\u003eWeight: 0.3 lbs.\u003c\/p\u003e\n\u003cp\u003eParfocal: Yes\u003c\/p\u003e\n\u003cp\u003eThreaded: Yes\u003c\/p\u003e\n\u003cp\u003eGlass Type: High Index\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\nTeleVue Product Number: BLW-2125","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552425345,"sku":"TEL-BLW-2125","price":214.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/486-1-thumb.jpeg?v=1776459318"},{"product_id":"3x-barlow-1-25-blw-3125","title":"Tele Vue 3X Barlow - 1.25\" - BLW-3125","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 3X Barlow - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eProperly designed \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eBarlow lenses\u003c\/a\u003e do wonderful things: They amplify power, slow the \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescope\u003c\/a\u003e''s f\/# (improving eyepiece sharpness), and give designers the opportunity to compensate for \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003etelescope eyepiece\u003c\/a\u003e aberrations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTele Vue Barlow Lenses\u003c\/b\u003e use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f\/4 \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescope\u003c\/a\u003e. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Barlow Lenses\u003c\/a\u003e even improve our competitor''s \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003etelescope eyepieces\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescopes\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"I originally designed the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Barlow Lens\u003c\/a\u003e line to complement the high performance of our \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e. Only 2 elements of high index glass were required to reduce all aberrations to well below the airy disc in an f\/4 system. It has taken a good 15 years, but I think we''re finally laying to rest the popular myth of the \"degrading Barlow.\" In a 1997 Sky \u0026amp; Telescope review, Terrence Dickenson wrote \"...Technology has erased the old objections. A modern \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eBarlow lens\u003c\/a\u003e will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\" target=\"blank\"\u003etelescope\u003c\/a\u003e''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e and their clones have built-in Barlows - ample evidence that the lens is not some detrimental intruder.\" Thanks Terry, I couldn''t agree more.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\" target=\"blank\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\" target=\"blank\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\" target=\"blank\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\" target=\"blank\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 3X Barlow - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduct design and execution deliver consummate satisfaction\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFeatures include parfocal-ization, 1.25\" filter threads, captive lock screws that won''t fall out and full multicoatings\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEvery Tele Vue Barlow must pass the same rigorous f\/4, full field testing as all their eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 3X Barlow - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eOptics Type: 3X Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Full multi-coatings\u003c\/p\u003e\n\u003cp\u003eWeight: 0.4 lbs.\u003c\/p\u003e\n\u003cp\u003eParfocal: Yes\u003c\/p\u003e\n\u003cp\u003eThreaded: Yes\u003c\/p\u003e\n\u003cp\u003eGlass Type: High Index\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\nTeleVue Product Number: BLW-3125","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552426049,"sku":"TEL-BLW-3125","price":214.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/488-1-thumb.jpeg?v=1776458944"},{"product_id":"2x-barlow-lens-1-25-sm-bar2x125","title":"Sky Mentor 2X Barlow Lens  with T-Thread - 1.25\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch3\u003eAbout the Sky Mentor 2X Barlow Lens - 1.25\"...\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cp\u003eWith optics fully multicoated and all-metal construction, the \u003cb\u003eSky Mentor Barlow 2X Barlow Lens\u003c\/b\u003e is where the story really starts. This Barlow lens is consistently the most popular recommendation by Khan Scope Centre because of its quality and its price. The Sky Mentor is capable of great performance and is built to last.  \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch3\u003eSky Mentor 2X Barlow Lens Features...\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003eFits any standard 1.25\" focuser\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAccepts all standard 1.25\" eyepieces\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eDoubles the magnification of any eyepiece\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-coatings for good image quality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e      \u003cbr\u003e \u003cem\u003eNow with T-thread so you can attach a DSLR or digital camera with optional\u003c\/em\u003e \u003cem\u003eadaptor sold separately for your specific brand make and model of camera.\u003c\/em\u003e\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch3\u003eSky Mentor 2X Barlow Lens - 1.25\" Specifications...\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eEyepiece Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 2X\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully Multi-coated \u003c\/p\u003e\n\u003cp\u003eWarranty: One Year\u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default","offer_id":10552434689,"sku":"SMT-BAR2X125","price":65.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/SMT-BARLOW2X.webp?v=1776458900"},{"product_id":"5x-five-element-barlow-lens-2-sm-bar5x2","title":"5X Five Element Barlow Lens - 2\" [SM-BAR5X2]","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Sky Mentor 5X Five Element Barlow Lens - 2\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe \u003cb\u003eSky Mentor 5X Five Element Barlow Lens - 2\"\u003c\/b\u003e will come in handy for extending the effective focal length of short-tube telescopes, to give them more magnifying power. It is the most powerful 2 inch barlow in existence, period!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis five element Barlow lens employs a sophisticated 5-element lens configuration engineered to render optically flatter, sharper images than standard barlows can provide.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe lenses of the \u003cb\u003eSky Mentor 5X Five Element Barlow Lens - 2\"\u003c\/b\u003e are fully multi-coated to ensure high light throughput, and their edges blackened for improved contrast. A non-marring compression ring secures the eyepiece in place. Slotted barrels prevent accidental slip-outs, and dual rubber grip bands on the housing ensure easy handling. One-year limited warranty.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eSky Mentor 5X Five Element Barlow Lens - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis premium, high-power barlow lens increases the magnification of any eyepiece by 5x\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIdeal for high-power lunar and planetary viewing, and solar system imaging with a webcam\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFive-element lens design renders optically flatter, sharper images than standard barlows\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully multi-coated optics for high light throughput; glare-threaded barrels for superior contrast\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eNon-marring compression ring secures eyepieces in place\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eSky Mentor 5X Five Element Barlow Lens - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 5X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\"\u003c\/p\u003e\n\u003cp\u003eEyepiece Acceptance: 2\" or 1.25\" w\/ optional adapter\u003c\/p\u003e\n\u003cp\u003e# of Elements: 5\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\n\u003cp\u003eSky Mentor Product Number: SM-BAR5X2\u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":10552435393,"sku":"SM-BAR5X2","price":249.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/2101-1-thumb.jpeg?v=1776458983"},{"product_id":"3x-five-element-barlow-lens-2-sm-bar3x2","title":"3X Five Element Barlow Lens - 2\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Sky Mentor 3X Five Element Barlow Lens...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe \u003cb\u003eSky Mentor 3X Five Element Barlow Lens - 2\"\u003c\/b\u003e will come in handy for extending the effective focal length of short-tube telescopes, to give them more magnifying power. It is the most powerful 2 inch barlow in existence, period!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eSky Mentor Optics Barlow\u003c\/b\u003e employs a sophisticated 5-element lens configuration engineered to render optically flatter, sharper images than standard barlows can provide.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe lenses of the \u003cb\u003eSky Mentor 3X Five Element Barlow Lens - 2\"\u003c\/b\u003e are fully multi-coated to ensure high light throughput, and their edges blackened for improved contrast. A non-marring compression ring secures the eyepiece in place. Slotted barrels prevent accidental slip-outs, and dual rubber grip bands on the housing ensure easy handling. One-year limited warranty.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eSky Mentor 3X Five Element Barlow Lens - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis premium, high-power barlow lens increases the magnification of any eyepiece by 3x\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIdeal for high-power lunar and planetary viewing, and solar system imaging\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFive-element lens design renders optically flatter, sharper images than standard barlows\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully multi-coated optics for high light throughput; glare-threaded barrels for superior contrast\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eNon-marring compression ring secures eyepieces in place\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eSky Mentor 3X Five Element Barlow Lens - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 3X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\"\u003c\/p\u003e\n\u003cp\u003eEyepiece Acceptance: 2\" or 1.25\" w\/ included adapter\u003c\/p\u003e\n\u003cp\u003e# of Elements: 5\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\n\u003cp\u003eSky Mentor Product Number: SM-BAR3X2\u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":10552435457,"sku":"skymen23x","price":189.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/2102-1-thumb.jpeg?v=1776458920"},{"product_id":"3x-five-element-barlow-lens-1-25-sm-bar3x125","title":"Sky Mentor 3X Five Element Barlow Lens 1.25\"","description":"\n\u003ccenter\u003e\n\u003ch3\u003eAbout the Sky Mentor 3X Five Element Barlow Lens...\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe \u003cb\u003eSky Mentor 3X Five Element Barlow Lens \u003c\/b\u003ewill come in handy for extending the effective focal length of short-tube telescopes, to give them more magnifying power.\u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eSky Mentor 3X Barlow\u003c\/b\u003e employs a sophisticated 5-element lens configuration engineered to render optically flatter, sharper images than standard barlows can provide.\u003c\/p\u003e\n\u003cp\u003eThe lenses of the \u003cb\u003eSky Mentor 3X Five Element Barlow Lens\u003c\/b\u003e are fully multi-coated to ensure high light throughput, and their edges blackened for improved contrast. A non-marring compression ring secures the eyepiece in place. Slotted barrels prevent accidental slip-outs, and dual rubber grip bands on the housing ensure easy handling. One-year limited warranty.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch3\u003eSky Mentor 3X Five Element Barlow Lens Features...\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003eThis premium, high-power barlow lens increases the magnification of any eyepiece by 3x\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003eIdeal for high-power lunar and planetary viewing, and solar system imaging with a webcam\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003eFive-element lens design renders optically flatter, sharper images than standard Barlow's\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003eFully multi-coated optics for high light throughput; glare-threaded barrels for superior contrast\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003eNon-marring compression ring secures eyepieces in place\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003e1.25\" Barrel size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter\u003e\n\u003ch2\u003eSky Mentor 3X Five Element Barlow Lens Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 3X\u003c\/p\u003e\n\u003cp\u003e# of Elements: 5\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\n\u003cp\u003eBarrel Size:  1.25\"\u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":40099588341873,"sku":"SMT-3X5ELEBAR-125","price":175.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/Sky_Mentor_3X_125_Barlow_5ELE.jpg?v=1776459277"},{"product_id":"5x-focal-extender-1-25-fe05-125","title":"Explore Scientific 5X Focal Extender - 1.25\" - FE05-125","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Explore Scientific 5X Focal Extender - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eA good Focal Extender adds some real versatility to your telescope accessory line-up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender like the \u003cb\u003eExplore Scientific 5X Focal Extender - 1.25\"\u003c\/b\u003e to increase your magnification, you get to enjoy the generous eye relief of the lower power eyepiece, and that''s quite a bonus, especially for eyeglass wearers or for those with fast telescopes who can really push high magnification eyepieces. Remember, we make focal extenders in 2X, 3X and 5x models, so there is something for every style of telescope.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 5X Focal Extender - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnjoy the generous eye relief of the lower power eyepiece\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncrease the magnification of any eyepiece with the same barrel size that you already own\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e4 element design\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" barrel size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 5X Focal Extender - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e5x Focal Extender: 1.25-inch O.D. Barrel\u003c\/p\u003e\n\u003cp\u003eItem Number: FE05-125\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25-inch\u003c\/p\u003e\n\u003cp\u003eLength: 96mm\u003c\/p\u003e\n\u003cp\u003eWidth: 45mm\u003c\/p\u003e\n\u003cp\u003eWeight: 260 grams; 9.2 oz\u003c\/p\u003e\nExplore Scientific Product Number: FE05-125","brand":"Explore Scientific","offers":[{"title":"Default","offer_id":10552457601,"sku":"EXP-FE05-125","price":274.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/FE05-125.png?v=1776459160"},{"product_id":"3x-focal-extender-1-25-fe03-125","title":"Explore Scientific 3X Focal Extender - 1.25\" - FE03-125","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Explore Scientific 3X Focal Extender - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eAn \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e does exactly what the name implies; it extends the effective focal length of the lens that it is used in conjunction with, thus producing higher magnifications for imaging and visual applications.\u003c\/p\u003e\n\u003cp\u003eFocal extenders are similar to a Barlow or tele-negative lens, but there is one important difference between the two that you will want to take into consideration, especially if you plan to use the \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e for imaging and astro-photography.\u003c\/p\u003e\n\u003cp\u003eWhen you use a standard Barlow or tele-negative lens to increase the magnification of your optical system, your results will be dependent on where you place the Barlow in the optical chain. For instance, if you put a 2X Barlow lens in front of your diagonal instead of behind it (Barlow-Diagonal-Eyepiece as opposed to Diagonal-Barlow-Eyepiece), you won'''t get 2X magnification in both set-ups. The magnification varies with placement. However, with an \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e, even if the distance is changed, the magnification remains the same. You can place your Focal Extender anywhere along the optical chain between an eyepiece or a camera, and if you are supposed to get 2X magnification, you will get 2X magnification.\u003c\/p\u003e\n\u003cp\u003eWhen it comes to imaging, this is a critical difference, because you may want to introduce an accessory like a flip mirror or filter wheel in between the \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e and a CCD camera, which would increase the distance to the focused image. This difference in design allows users to rest easy, whether they are pumping up the magnification of a lower power eyepiece for visual observations or using their Explore Focal Extender in imaging applications.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 3X Focal Extender - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ci\u003eMore Magnification Choices without Sacrificing Eye Relief:\u003c\/i\u003e A good Focal Extender adds some real versatility to your telescope accessory line-up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender to increase your magnification, you get to enjoy the generous eye relief of the lower power eyepiece, and that'''s quite a bonus, especially for eyeglass wearers or for those with fast telescopes who can really push high magnification eyepieces. Remember, we make focal extenders in 2X, 3X and 5x models, so there is something for every style of telescope.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eOptimized Optical Design:\u003c\/i\u003e Explore Focal Extenders are optimized through each design, fabrication, and testing process to produce high contrast, high resolution images.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eDurable Coatings \u0026amp; Finishing Touches:\u003c\/i\u003e Each of the four elements in your Explore Scientific Focal Extender is fully multi-coated with EMD enhanced coatings, resulting in bright, sharp images; and every element has blackened edges to reduce internal reflections and increase contrast.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eTapered Barrel for Extra Security:\u003c\/i\u003e The insert barrel of each extender is double-tapered to allow smooth insertion to, and removal from, a telescope'''s eyepiece holder, focuser or diagonal, however the wide dimension of the taper helps prevent the focal extender from falling out of the telescope should the set-screw holding it in place become loose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 3X Focal Extender - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Focal Extender\u003c\/p\u003e\n\u003cp\u003eMagnfication Factor: 3X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eDimensions: L=93mm x W=45mm\u003c\/p\u003e\n\u003cp\u003eWeight: 249 grams; 8.7 oz\u003c\/p\u003e\n\u003cp\u003eExplore Scientific Product Number: FE03-125\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default","offer_id":10552457729,"sku":"EXP-FE03-125","price":288.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/5079-1-thumb.jpeg?v=1776459211"},{"product_id":"2x-focal-extender-1-25-fe02-125","title":"Explore Scientific 2X Focal Extender - 1.25\" - FE02-125","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Explore Scientific 2X Focal Extender - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eAn \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e does exactly what the name implies; it extends the effective focal length of the lens that it is used in conjunction with, thus producing higher magnifications for imaging and visual applications.\u003c\/p\u003e\n\u003cp\u003eFocal extenders are similar to a Barlow or tele-negative lens, but there is one important difference between the two that you will want to take into consideration, especially if you plan to use the \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e for imaging and astro-photography.\u003c\/p\u003e\n\u003cp\u003eWhen you use a standard Barlow or tele-negative lens to increase the magnification of your optical system, your results will be dependent on where you place the Barlow in the optical chain. For instance, if you put a 2X Barlow lens in front of your diagonal instead of behind it (Barlow-Diagonal-Eyepiece as opposed to Diagonal-Barlow-Eyepiece), you won''t get 2X magnification in both set-ups. The magnification varies with placement. However, with an \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e, even if the distance is changed, the magnification remains the same. You can place your Focal Extender anywhere along the optical chain between an eyepiece or a camera, and if you are supposed to get 2X magnification, you will get 2X magnification.\u003c\/p\u003e\n\u003cp\u003eWhen it comes to imaging, this is a critical difference, because you may want to introduce an accessory like a flip mirror or filter wheel in between the \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e and a CCD camera, which would increase the distance to the focused image. This difference in design allows users to rest easy, whether they are pumping up the magnification of a lower power eyepiece for visual observations or using their Explore Focal Extender in imaging applications.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 2X Focal Extender - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ci\u003eMore Magnification Choices without Sacrificing Eye Relief:\u003c\/i\u003e A good Focal Extender adds some real versatility to your telescope accessory line-up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender to increase your magnification, you get to enjoy the generous eye relief of the lower power eyepiece, and that''s quite a bonus, especially for eyeglass wearers or for those with fast telescopes who can really push high magnification eyepieces. Remember, we make focal extenders in 2X, 3X and 5x models, so there is something for every style of telescope.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eOptimized Optical Design:\u003c\/i\u003e Explore Focal Extenders are optimized through each design, fabrication, and testing process to produce high contrast, high resolution images.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eDurable Coatings \u0026amp; Finishing Touches:\u003c\/i\u003e Each of the four elements in your Explore Scientific Focal Extender is fully multi-coated with EMD enhanced coatings, resulting in bright, sharp images; and every element has blackened edges to reduce internal reflections and increase contrast.\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eTapered Barrel for Extra Security:\u003c\/i\u003e The insert barrel of each extender is double-tapered to allow smooth insertion to, and removal from, a telescope''s eyepiece holder, focuser or diagonal, however the wide dimension of the taper helps prevent the focal extender from falling out of the telescope should the set-screw holding it in place become loose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 2X Focal Extender - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Focal Extender\u003c\/p\u003e\n\u003cp\u003eMagnfication Factor: 2X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eDimensions: L=96mm x W=45mm\u003c\/p\u003e\n\u003cp\u003eWeight: 260 grams; 9.1 oz\u003c\/p\u003e\n\u003cp\u003eExplore Scientific Product Number: FE02-125\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default","offer_id":10552458177,"sku":"EXP-FE02-125","price":274.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/5078-1-thumb.jpeg?v=1776459235"},{"product_id":"2x-focal-extender-w-adapter-2-fe02-020","title":"Explore Scientific 2X Focal Extender with Adapter - 2\" - FE02-020","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Explore Scientific 2X Focal Extender w\/ Adapter - 2\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eAn \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e does exactly what the name implies; it extends the effective focal length of the lens that it is used in conjunction with, thus producing higher magnifications for imaging and visual applications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFocal extenders are similar to a Barlow or tele-negative lens, but there is one important difference between the two that you will want to take into consideration, especially if you plan to use the \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e for imaging and astro-photography.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhen you use a standard Barlow or tele-negative lens to increase the magnification of your optical system, your results will be dependent on where you place the Barlow in the optical chain. For instance, if you put a 2X Barlow lens in front of your diagonal instead of behind it (Barlow-Diagonal-Eyepiece as opposed to Diagonal-Barlow-Eyepiece), you won''t get 2X magnification in both set-ups. The magnification varies with placement. However, with an \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e, even if the distance is changed, the magnification remains the same. You can place your Focal Extender anywhere along the optical chain between an eyepiece or a camera, and if you are supposed to get 2X magnification, you will get 2X magnification.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWhen it comes to imaging, this is a critical difference, because you may want to introduce an accessory like a flip mirror or filter wheel in between the \u003cb\u003eExplore Scientific Focal Extender\u003c\/b\u003e and a CCD camera, which would increase the distance to the focused image. This difference in design allows users to rest easy, whether they are pumping up the magnification of a lower power eyepiece for visual observations or using their Explore Focal Extender in imaging applications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 2X Focal Extender w\/ Adapter - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ci\u003eMore Magnification Choices without Sacrificing Eye Relief:\u003c\/i\u003e A good Focal Extender adds some real versatility to your telescope accessory line-up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender to increase your magnification, you get to enjoy the generous eye relief of the lower power eyepiece, and that''s quite a bonus, especially for eyeglass wearers or for those with fast telescopes who can really push high magnification eyepieces. Remember, we make focal extenders in 2X, 3X and 5x models, so there is something for every style of telescope.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eOptimized Optical Design:\u003c\/i\u003e Explore Focal Extenders are optimized through each design, fabrication, and testing process to produce high contrast, high resolution images.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eDurable Coatings \u0026amp; Finishing Touches:\u003c\/i\u003e Each of the four elements in your Explore Scientific Focal Extender is fully multi-coated with EMD enhanced coatings, resulting in bright, sharp images; and every element has blackened edges to reduce internal reflections and increase contrast.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003eTapered Barrel for Extra Security:\u003c\/i\u003e The insert barrel of each extender is double-tapered to allow smooth insertion to, and removal from, a telescope''s eyepiece holder, focuser or diagonal, however the wide dimension of the taper helps prevent the focal extender from falling out of the telescope should the set-screw holding it in place become loose.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eExplore Scientific 2X Focal Extender w\/ Adapter - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Focal Extender\u003c\/p\u003e\n\u003cp\u003eMagnfication Factor: 2X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\"\u003c\/p\u003e\n\u003cp\u003eAdapter: 1.25\"\u003c\/p\u003e\n\u003cp\u003eDimensions: L=118mm x W=66mm\u003c\/p\u003e\n\u003cp\u003eWeight: 752 grams; 26.5 oz\u003c\/p\u003e\nExplore Scientific Product Number: FE02-020","brand":"Explore Scientific","offers":[{"title":"Default","offer_id":10552459713,"sku":"EXP-FE02-020","price":411.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/4499-1-thumb.jpeg?v=1776459160"},{"product_id":"2x-x-cel-lx-barlow-lens-1-25-93529","title":"Celestron 2X X-Cel LX Barlow Lens - 1.25\" - 93529","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Celestron 2X X-Cel LX Barlow Lens - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eDouble your magnification with the \u003cb\u003eCelestron 2x X-Cel LX Barlow Lens\u003c\/b\u003e. This three element, fully multicoated Barlow follows the mechanical design and optical quality of the X-Cel LX line of eyepieces, featuring a brass pressure ring and a no-slip rubber grip.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron 2X X-Cel LX Barlow Lens - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3-element Fully multi coated design\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrass pressure ring - Holds eyepiece more securely without damaging barrel\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eRubber grip and hard black anodize finish with orange ring\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eThreaded for 1.25\" filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron 2X X-Cel LX Barlow Lens - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eMagnification: 2 x\u003c\/p\u003e\n\u003cp\u003eOptical Coatings: Fully Multi Coated\u003c\/p\u003e\n\u003cp\u003eSize: 1.25 in (32 mm)\u003c\/p\u003e\n\u003cp\u003e# of Elements: 3\u003c\/p\u003e\nCelestron Product Number: 93529","brand":"Celestron","offers":[{"title":"Default","offer_id":10552466113,"sku":"CEL-93529","price":174.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/ImageGen.ashx_image_2Fmedia_2F382015_2F93529-X-Cel_2x_Barlow_01.jpg_altImage_2Fimages_2Fwhite800x600.jpeg?v=1776459275"},{"product_id":"3x-x-cel-lx-barlow-lens-1-25-93428","title":"Celestron 3X X-Cel LX Barlow Lens - 1.25\" - 93428","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Celestron 3X X-Cel LX Barlow Lens - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe latest addition to the X-Cel LX line - the \u003cb\u003eCelestron 3X X-Cel LX Barlow Lens\u003c\/b\u003e - is perfect for astronomical observing, especially with short focal length telescopes. Fully multi-coated 3-element Apochromatic design offers superior sharpness and color correction.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eCelestron 3X X-Cel LX Barlow Lens\u003c\/b\u003e triples the magnification of your current eyepieces. Perfect for short tube telescope owners that are looking for more power in their lunar or planetary views.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron 3X X-Cel LX Barlow Lens - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3-Element Apochromatic Lens - Superior sharpness and color correction\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optics - Increases contrast and minimizes internal reflections\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrass Compression Ring - Securely holds your eyepiece in place\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron 3X X-Cel LX Barlow Lens - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 3X\u003c\/p\u003e\n\u003cp\u003e# of Elements: 3\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\nCelestron Product Number: 93428","brand":"Celestron","offers":[{"title":"Default","offer_id":10552466497,"sku":"CEL-93428","price":174.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/ImageGen.ashx_image_2Fmedia_2F381974_2F93428-Ex-Cel-3x-Barlow_01.jpg_altImage_2Fimages_2Fwhite800x600.jpeg?v=1776458962"},{"product_id":"luminos-2-barlow-lens-93436","title":"Celestron Luminos 2\" Barlow Lens - 93436","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Celestron Luminos 2\" Barlow Lens...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe \u003cb\u003eCelestron Luminos 2\" Barlow Lens\u003c\/b\u003e inserts between the eyepiece and the eyepiece holder on the telescope and increases the magnification by 2.5x. It can be used with 1.25\" eyepiece and 2\" eyepieces. The 4-element fully multicoated lens assembly offers superb field flatness and minimal chromatic aberration.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron Luminos 2\" Barlow Lens Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4-element fully multicoated barlow\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e2.5x magnification\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eCan be used with 1.25\" and 2\" eyepieces\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eBrass compression rings securely hold eyepieces without marring the eyepiece barrel''s finish\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eThreaded to accept 2\" eyepiece filters\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eRubber grip for easy handling in cold weather or with gloves\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eLarge set screw knobs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron Luminos 2\" Barlow Lens Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eLength: 93 mm (3.66 in)\u003c\/p\u003e\n\u003cp\u003eWidth: 64 mm (2.52 in)\u003c\/p\u003e\n\u003cp\u003eWeight (oz): 11 oz (312 g)\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\" in (51 mm)\u003c\/p\u003e\n\u003cp\u003eMagnification: 2.5 x\u003c\/p\u003e\n\u003cp\u003eOptical Coatings: Fully Multi-Coated\u003c\/p\u003e\n\u003cp\u003eFilter Threads: Yes\u003c\/p\u003e\n\u003cp\u003eEyepiece Adapter: 1.25\"\u003c\/p\u003e\n\u003cp\u003eCompression Rings: Yes on both 2\" and 1.25\" eyepiece holders\u003c\/p\u003e\n\u003cp\u003eClear Aperture (mm): 28 mm (1.1 in)\u003c\/p\u003e\nCelestron Product Number: 93436","brand":"Celestron","offers":[{"title":"Default","offer_id":10552467137,"sku":"CEL-93436","price":222.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/4544-1-thumb.jpeg?v=1776459111"},{"product_id":"2x-omni-barlow-lens-1-25-93326","title":"Celestron 2X Omni Barlow Lens - 1.25\" - 93326","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Celestron 2X Omni Barlow Lens - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eA Barlow lens is the astronomy accessory that keeps on giving! Insert it between your eyepiece and your telescope to get double the magnification instantly. Let'''s say you have two eyepieces in your accessory case, a 10 mm and a 25 mm. Add a \u003cb\u003eCelestron Omni 2X Barlow Lens\u003c\/b\u003e to the mix, and now you have four magnifications to choose from. Combining this lens with the 25 mm provides double the magnification, or the equivalent of a 12.5 mm eyepiece, while the 10 mm gives you the power of a 5 mm eyepiece.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEye relief is the distance your eye has to be from the first lens in the eyepiece in order to see the full field of view. When you use a \u003cb\u003eCelestron Omni 2X Barlow Lens\u003c\/b\u003e with an eyepiece, you get double the magnification, but the eye relief is not affected. This is a good thing, because normally the shorter the focal length of the eyepiece, the less eye relief you have. In other words, a standard 10mm eyepiece, as a general rule, will have better eye relief than a 5mm eyepiece. Bonus!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eCelestron Omni 2X Barlow Lens\u003c\/b\u003e comes in a sleek, silver package. The two-element optics are fully multi-coated, and the edges of the lenses are blackened to cut down on internal reflections. The 1.25\" barrel will fit in standard 1.25\" focusers and diagonals, and the Barlow will accept 1.25\" eyepieces. A metal thumbscrew locks the eyepiece firmly in place.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron 2X Omni Barlow Lens - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2-element fully-multicoated optical design\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eBlackend lens edges to prevent stray reflections\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eDoubles the power of any eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eCelestron 2X Omni Barlow Lens - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 2X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003e# of Elements: 2\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\nCelestron Product Number: 93326","brand":"Celestron","offers":[{"title":"Default Title","offer_id":10552468161,"sku":"CEL-93326","price":58.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/ImageGen.ashx_image_2Fmedia_2F381930_2F93326-omni-barlow_01.jpg_altImage_2Fimages_2Fwhite800x600.jpeg?v=1776459176"},{"product_id":"2-25x-triplet-barlow-lens-1-25-hyp-barlow-in-stock-now","title":"Baader 2.25X Hyperion Barlow Lens - 1.25\" - HYP-BARLOW","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Baader 2.25X Triplet Barlow - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eDo you want even more magnfication? The check out the \u003cb\u003eBaader 2.25X Barlow Lens\u003c\/b\u003e! The included T2 adapter will allow it to be coupled to any of the 1.25\" eyepiece holders, or it can be directly attached to a 1.25\" eyepieces threads with the other included adapter.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAble to be used with any eyepiece that''s designed with a 1.25\" thread, the Baader Planetrium modular design of the \u003cb\u003eBaader 2.25X Barlow Lens\u003c\/b\u003e allows for a wide variety of configurations to suit your every need. The primary optical body can be used with either supplied adapter to mate it to a 1.25\" eyepiece - or the T-Adapter which connects with optional T-Rings for use as a photo projection lens. What''s more, you can also change the magnification levels through the use of optional additional 1.25\" or T-thread spacers or extension tubes\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eBaader 2.25X Triplet Barlow - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOptically Matched for perfect optical performance with the Hyperion 8-24mm Clickstop Zoom.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAnastigmatic Flatfield Design.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAir-spaced triplet lens.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eBaader Phantom Group Coatings on all air-glass surfaces\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully internally baffled and blackened to eliminate stray light reflections\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnables dual 2\"\/1.25\" Barrel Configuration with all Baader Hyperion Clickstop Zooms (MkI - MkIII)\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eThreaded for standard 1.25\" filters.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eModular Design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eBaader 2.25X Triplet Barlow - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eOptics Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 2.25X\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully Multi-Coated\u003c\/p\u003e\nBaader Planetarium Product Number: HYP-BARLOW","brand":"Baader Planetarium","offers":[{"title":"Default","offer_id":10552470209,"sku":"BAA-HYP-BARLOW","price":194.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/hyp_bundle_gross.jpeg?v=1776459220"},{"product_id":"3x-barlow-lens-1-25-ub3s","title":"Antares 3X Barlow Lens - 1.25\" - UB3S","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Antares 3X Barlow Lens - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe high performance \u003cb\u003eAntares 3X Barlow Lens\u003c\/b\u003e features 27mm clear aperture and fully multi-coated lenses in an achromatic design. Available in 3x, this short design will work in diagonals, has edge-blackened lenses for high contrast and are parfocal with most eyepieces. Suitable for high contrast, high power applications in any telescope.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAntares 3X Barlow Lens - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTriples the magnification power of any 1.25\"\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eShort design for limited space with diagonals\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEdge-blackened lenses for high contrast and are parfocal with most eyepieces\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for high contrast, high power applications in any telescope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAntares 3X Barlow Lens - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Short Barlow Lens\u003c\/p\u003e\n\u003cp\u003eDesign: Acromatic\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 3x\u003c\/p\u003e\n\u003cp\u003eClear Aperture: 27mm\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully Multi-coated\u003c\/p\u003e\nAntares Optical Product Number: UB3S","brand":"Antares","offers":[{"title":"Default Title","offer_id":10552478721,"sku":"ANT-4127","price":62.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/125-barlow-3x_252b5441-3461-4540-9397-231fdf1da175.jpg?v=1776459017"},{"product_id":"3x-twist-lock-barlow-lens-1-25-ub3stl","title":"Antares 3X Twist Lock Barlow Lens - 1.25\" - UB3TL","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Antares 3X Twist Lock Barlow Lens - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe \u003cb\u003eAntares 3X Twist Lock Barlow Lens \u003c\/b\u003efeatures an amazing compression ring technology which not only protects your eyepieces, but maintains images in true focal plane. It also offers T-2 threads.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAntares 3X Twist Lock Barlow Lens - 1.25\" Features... \u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003eUnique twist lock design in a 1.25\" barrel format\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eTriples the magnifying power of any 1.25\" eyepiece\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully multi-coated for color clarity and contrast\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaintains images in the true focal plane\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAntares 3X Twist Lock Barlow Lens - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 3X\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\nAntares Optical Product Number: UB3TL","brand":"Antares","offers":[{"title":"Default Title","offer_id":10552479297,"sku":"ANT-4112","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/barlow-125-twist-lock-3x_1cc9e89e-3ef5-4e9d-8bc3-c4eb29a658af.jpg?v=1776458929"},{"product_id":"5x-twist-lock-barlow-lens-1-25-ub5stl","title":"Antares 5X Twist Lock Barlow Lens - 1.25\" - UB5TL","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the Antares 5X Twist Lock Barlow Lens - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eIntroducing the \u003cb\u003eAntares 5X Twist Lock Barlow Lens\u003c\/b\u003e. This product features an amazing compression ring technology which not only protects your eyepieces, but maintains images in true focal plane.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAntares 5X Twist Lock Barlow Lens - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003eUnique twist lock design in a 1.25\" barrel format\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdds five times to the magnifying power of any 1.25\" eyepiece\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully multi-coated for color clarity and contrast\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaintains images in the true focal plane\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAntares 5X Twist Lock Barlow Lens - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eMagnification Factor: 5X\u003c\/p\u003e\n\u003cp\u003eCoatings: Fully multi-coated\u003c\/p\u003e\nAntares Optical Product Number: UB5TL","brand":"Antares","offers":[{"title":"Default Title","offer_id":10552479425,"sku":"ANT-4113","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/barlow-125-twist-lock-5x_c2d4bb2c-a0e0-4762-a07b-615325131eb1.jpg?v=1776459270"},{"product_id":"celestron-t-adapter-and-barlow-lens-universal-1-25-93640","title":"Celestron T-Adapter And Barlow Lens - Universal - 1.25\" - 93640","description":"\u003ch3 style=\"text-align: center;\"\u003eCelestron T-Adapter\/Barlow Lens Universal - 1.25\"\u003c\/h3\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cul\u003e\n\u003cli\u003eThe Celestron Universal Barlow \u0026amp; T-Adapter is three accessories in one!\u003c\/li\u003e\n\u003cli\u003e2X Barlow:  Use during visual observing to double the magnification of every 1.25” eyepiece you own\u003c\/li\u003e\n\u003cli\u003ePrime Focus Photography: Use the T-Adapter portion of this accessory to transform your telescope into a giant telephoto lens for use with your camera\u003c\/li\u003e\n\u003cli\u003eTele-Extended Photography:  Use the T-Adapter with Barlow to get double the magnification of prime focus mode\u003c\/li\u003e\n\u003cli\u003eThe standard T-threads accept a camera brand specific T-Ring (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp class=\"Body\"\u003eIf you’d like some flexibility in your astrophotography set-up, consider the Celestron Universal Barlow \u0026amp; T-Adapter (93640). This 1.25” accessory can be used three ways: as a 2X Barlow for visual use, as a prime focus T-adapter, or as a “Barlowed” T-adapter for double the magnification and the benefit of extra inward focus travel for scopes which do not have sufficient back focus distance.\u003c\/p\u003e\n\u003cp class=\"Body\"\u003eThe Universal Barlow \u0026amp; T-Adapter can be used as a 2X Barlow right out of the box.  Insert any 1.25” eyepiece into the chamber and you’ll enjoy double the magnification, while retaining all the eye relief of the inserted eyepiece. \u003c\/p\u003e\n\u003cp class=\"Body\"\u003eThe Celestron Universal Barlow \u0026amp; T-Adapter can also be used for prime focus photography, which means you use the telescope as a photographic lens—a very big photographic lens! Just unscrew the bottom section of the unit to remove the Barlow and slide the chrome barrel into the telescope’s 1.25” focuser or adapter.  Lock it firmly in place with the focuser or adapter thumbscrew.  T-threads on the top of the adapter screw into a T-Ring (sold separately) that is designed to attach to the brand-specific mounting flange of your DSLR or SLR camera.\u003c\/p\u003e\n\u003ch3 class=\"Body\" style=\"text-align: center;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003eBarlow Lens Optical Magnification:    2 times the magnification of your scope and your eyepiece\u003c\/p\u003e\n\u003cp\u003eAdapter Barrel Size:    1.25\" (32mm)\u003c\/p\u003e\n\u003cp\u003eExternal Length:          3\" (76mm)\u003c\/p\u003e\n\u003cp\u003eWeight of Item:            2.3oz (65gm)\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":23077780673,"sku":"CEL-93640","price":97.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/93640_T_Adapter_Barlow.jpg?v=1776459167"},{"product_id":"baader-q-barlow-lens-ht-multicoated-bqb","title":"Baader Q-Barlow Lens - HT-Multicoated - BQB","description":"\u003ch3 style=\"text-align: center;\"\u003eBaader Q-Barlow Lens - HT-Multicoated\u003c\/h3\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Classic Q-Barlow has been optically matched to the Classic Eyepieces, and its 2.25X magnification gives a well spaced set of focal lengths.  Its removable lens cell can also be unthreaded from the 1.25\" barrel, and directly threaded onto any of the Classic Baader eyepieces to give 1.3X, further filling in the choice of focal lengths.  Alternatively, it can be directly threaded onto the 1.25\" barrel of the Q-Turret to give 2.25X with all 4 Classic eyepieces.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eSpecifications:\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e \u003ccol span=\"1\" width=\"250\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMANUFACTURER\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU (#)\u003c\/td\u003e\n\u003ctd\u003e2956185\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWEIGHT (KG)\u003c\/td\u003e\n\u003ctd\u003e0.067\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER CONNECTION (LENS SIDED)\u003c\/td\u003e\n\u003ctd\u003eThread, M28,5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER CONNECTION (LENS SIDED)\u003c\/td\u003e\n\u003ctd\u003eBarrel, 1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/td\u003e\n\u003ctd\u003eClamp, 1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLAMPING SYSTEM\u003c\/td\u003e\n\u003ctd\u003eScrew clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMAGNIFICATION (X)\u003c\/td\u003e\n\u003ctd\u003e2,25x \/ 1,3x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-COATING\u003c\/td\u003e\n\u003ctd\u003eHigh transmission multi-coated (HT-MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eADAPTABLE TO\u003c\/td\u003e\n\u003ctd\u003eQ-Turret and Classic Ortho\/Plössl eyepieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBARREL SIZE (Inch)\u003c\/td\u003e\n\u003ctd\u003e1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOPTICAL DESIGN\u003c\/td\u003e\n\u003ctd\u003eBarlow lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":33019905857,"sku":"BAA-BQB","price":81.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/Qbarlow_Lg.jpg?v=1776458929"},{"product_id":"baader-planetarium-vip-2x-modular-barlow-vipb","title":"Baader Planetarium VIP 2X Modular Barlow - VIPB","description":"\u003ccenter\u003e\n\u003ch3\u003eBaader Planetarium VIP 2X Modular Barlow\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe Baader Planetarium VIP Modular Barlow is a complete high quality 2X photo-visual barlow system. The VIP (VIsual and Photographic) barlow is ingeniously designed for functionality and flexibility. It consists of several modular component parts, which enable you to configure the barlow for multiple visual and imaging uses.\u003c\/p\u003e\n\u003cp\u003eDesigned to accept 1¼” eyepieces and fit 1¼” focusers, it also incorporates a 2\" section for use in 2\" focusers. The eyepiece holder uses dual nickel plated clamp screws for maximum convenience and security, and incorporates a captive spring bronze lock ring to prevent any possibility of damage to your eyepieces. As with all Baader Planetarium products, the quality of machining and detail of design is unsurpassed. The internal surfaces are all fully sharp V-threaded and blackened to eliminate stray light reflections. Surfaces are finely machined and satin anodized for function and appearance, and the pieces all fit closely and precisely.\u003c\/p\u003e\n\u003cp\u003eThe heart of the VIP modular barlow is its precision air-spaced negative lens assembly. The large 24mm clear diameter of the optics minimizes vignetting, and its apochromatic field-flattening design makes it well suited for high power planetary observing as well as for CCD cameras. Both lens elements are polished to a very high standard, and fully multi-coated, using the finest 7 layer multi-coatings available today (reflections per surface are less than 0.2% !). The result is a sharp, high-contrast image that is virtually unaffected by its passage through the barlow.\u003c\/p\u003e\n\u003cp\u003eOne of the distinguishing features of the VIP Modular Barlow is its construction from multiple interchangeable parts. The structural building blocks of the barlow interconnect using standard T-2 (42mm) threading, enabling you to easily configure the system for multiple uses. The nominal multiplication factor of the barlow is 2X, based on a 68mm distance from the barlow lens (flange top surface) to eyepiece field stop or film focal plane. As supplied, the VIP barlow provides this nominal distance at the top surface of the eyepiece holder.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ccolgroup\u003e \u003ccol span=\"1\" width=\"250\"\u003e \u003c\/colgroup\u003e\n\u003ccaption\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMANUFACTURER\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU (#)\u003c\/td\u003e\n\u003ctd\u003e2406101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWEIGHT (KG)\u003c\/td\u003e\n\u003ctd\u003e0.227\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER CONNECTION (LENS SIDED)\u003c\/td\u003e\n\u003ctd\u003eThread, M28, T-2 (M42 x 0,75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER CONNECTION (LENS SIDED)\u003c\/td\u003e\n\u003ctd\u003eBarrel, 1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/td\u003e\n\u003ctd\u003eClamp, 1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/td\u003e\n\u003ctd\u003eThread, T-2 (M42 x 0,75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLAMPING SYSTEM\u003c\/td\u003e\n\u003ctd\u003eScrew clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-COATING\u003c\/td\u003e\n\u003ctd\u003emulti-coated (MC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFOCAL LENGTH REDUCTION\u003c\/td\u003e\n\u003ctd\u003e-65,5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER DIAMETER \/ CLEAR APERTURE (MM)\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBARREL SIZE (IN)\u003c\/td\u003e\n\u003ctd\u003e1¼\", 2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOPTICAL DESIGN\u003c\/td\u003e\n\u003ctd\u003eBarlow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSPECIALITY\u003c\/td\u003e\n\u003ctd\u003eBarlow lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":33096802305,"sku":"BAA-VIPB","price":332.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/b.jpg?v=1776458948"},{"product_id":"sky-mentor-2x-barlow-1-25-with-t-thread-1-25","title":"Sky Mentor 2x Fully Multicoated Barlow 1.25\" with T-Thread  1.25\" - 2X125","description":"\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003cbr\u003e2x Fully multicoated barlow 1.25\" with T thread\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTake your view of the sky to new heights with the Sky Mentor 2x Barlow 1.25\"!\u003c\/p\u003e\n\u003cp\u003eThis 1.25\" 2x Barlow Lens for telescopes magnifies your vision, enabling you to see more of the stars and galaxies above. With a T thread bringing it all together, you can explore the beautiful mysteries of the night sky like never before. So, what are you waiting for? Discover the wonders of the universe now!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e*Use with your DSLS t mount for astro-imaging and planetary photography\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e*Use with 1.25\" scopes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWorks with all brands of telescopes \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDust cap included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2 year warranty \u003c\/strong\u003e\u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":31811025862769,"sku":"SMT-2X125","price":59.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/s-l1600-2.jpg?v=1776459266"},{"product_id":"antares-barlow-lens-1-25-1-5x-twist-lock-4110","title":"Antares 1.5X Twist-Lock Barlow Lens - 1.25\" - UB1.5TL","description":"\u003ch3 style=\"text-align: center;\"\u003eAntares Barlow Lens - 1.25\" - 1.5x - Twist-Lock\u003c\/h3\u003e\n\n\u003ch3 style=\"text-align: center;\"\u003eProduct Highlights:\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eAntares Barlow Lens - 1.25\" - 1.5x\u003c\/li\u003e\n\t\u003cli\u003e1.5x Increase of Nominal Focal Length\u003c\/li\u003e\n\t\u003cli\u003e27 mm Aperture Doublet\u003c\/li\u003e\n\t\u003cli\u003eIncludes Twist-Lock Collar for Eyepieces\u003c\/li\u003e\n\t\u003cli\u003eAccepts 1.25\" Accessories\u003c\/li\u003e\n\t\u003cli\u003eIncludes T2 Threads (Twist-Lock Removed)\u003c\/li\u003e\n\t\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nAntares Twist-lock barlows make it easy to insert and remove your existing eyepiece and work with any barrel format. These extend focal length, reduce spherical aberration, extend eye relief and have T2 camera thread with the Twist-lock collar removed. The 1.25\" UB1.5STL is a fully multicoated achromat with a 27 mm aperture and increases the focal length (and eyepiece magnification) by 1.5 times.\n\u003c\/p\u003e\n\u003cp\u003e\n\u003cstrong\u003eNOTE:\u003c\/strong\u003e Photo shows this Barlow attached to a digital camera as an illustration of the T2 thread utilization, only. This product does NOT include any camera. It is only a Barlow Lens.\n\u003c\/p\u003e\n\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\n\u003ctable\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eAntares Model No:\u003c\/td\u003e \u003ctd\u003eUB1.5STL\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eOptics Type:\u003c\/td\u003e \u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eAperture:\u003c\/td\u003e \u003ctd\u003e27 mm\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eFocal Length:\u003c\/td\u003e \u003ctd\u003e-NA-\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eOptical Design:\u003c\/td\u003e \u003ctd\u003eNegative Doublet\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eFL Increase:\u003c\/td\u003e \u003ctd\u003e1.5x\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eIncludes:\u003c\/td\u003e \u003ctd\u003e1.25\" Twist-Lock retainer\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\t\u003ctr\u003e\n\t\t\u003ctd\u003eIncludes:\u003c\/td\u003e \u003ctd\u003eT2 Threads\u003c\/td\u003e\n\t\u003c\/tr\u003e\n\u003c\/table\u003e\n","brand":"Antares","offers":[{"title":"Default Title","offer_id":31974939361393,"sku":"ANT-4110","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/barlow-125-twist-lock-15x.jpg?v=1776459269"},{"product_id":"antares-barlow-lens-1-25-2x-twist-lock-4111","title":"Antares 2X Twist-Lock Barlow Lens - 1.25\" - UB2TL","description":"\u003ch3 style=\"text-align: center;\"\u003eAntares Barlow Lens - 1.25\" - 2x - Twist-Lock\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eProduct Highlights:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAntares Barlow Lens - 1.25\" - 2x\u003c\/li\u003e\n\u003cli\u003e2x Increase of Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003e27 mm Aperture Doublet\u003c\/li\u003e\n\u003cli\u003eIncludes Twist-Lock Collar for Eyepieces\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" Accessories\u003c\/li\u003e\n\u003cli\u003eIncludes T2 Threads (Twist-Lock Removed)\u003c\/li\u003e\n\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAntares Twist-lock barlows make it easy to insert and remove your existing eyepiece and work with any barrel format. These extend focal length, reduce spherical aberration, extend eye relief and have T2 camera thread with the Twist-lock collar removed. The 1.25\" UB2TL is a fully multicoated achromat with a 27 mm aperture and increases the focal length (and eyepiece magnification) by 2 times.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Photo shows this Barlow attached to a digital camera as an illustration of the T2 thread utilization, only. This product does NOT include any camera. It is only a Barlow Lens.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntares Model No:\u003c\/td\u003e\n\u003ctd\u003eUB2TL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Type:\u003c\/td\u003e\n\u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e-NA-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eNegative Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFL Increase:\u003c\/td\u003e\n\u003ctd\u003e2x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes:\u003c\/td\u003e\n\u003ctd\u003e1.25\" Twist-Lock retainer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes:\u003c\/td\u003e\n\u003ctd\u003eT2 Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":31974972358769,"sku":"ANT-4111","price":80.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/barlow-125-twist-lock-2x.jpg?v=1776459243"},{"product_id":"antares-barlow-lens-2-1-6x-twist-lock-4120","title":"Antares 1. 6X Twist-Lock Barlow Lens - 2\" - 2UBSTL","description":"\u003ch3 style=\"text-align: center;\"\u003eAntares Barlow Lens - 2\" - 1.6x - Twist-Lock\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eProduct Highlights:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAntares Barlow Lens - 2\" - 1.6x\u003c\/li\u003e\n\u003cli\u003e1.6x Increase of Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003e44 mm Aperture Doublet\u003c\/li\u003e\n\u003cli\u003eIncludes Twist-Lock Collar for Eyepieces\u003c\/li\u003e\n\u003cli\u003eAccepts 2\" Accessories\u003c\/li\u003e\n\u003cli\u003eIncludes T2 Threads (Twist-Lock Removed)\u003c\/li\u003e\n\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAntares Twist-lock barlows make it easy to insert and remove your existing eyepiece and work with any barrel format. These extend focal length, reduce spherical aberration, extend eye relief and have T2 camera thread with the Twist-lock collar removed. The 2\" - 2UBSTL is a fully multicoated achromat with a 44 mm aperture and increases the focal length (and eyepiece magnification) by 1.6 times. Has a \u003cspan\u003eM42 T-thread camera adapter.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntares Model No:\u003c\/td\u003e\n\u003ctd\u003e2UBSTL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Type:\u003c\/td\u003e\n\u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e-NA-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eNegative Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFL Increase:\u003c\/td\u003e\n\u003ctd\u003e1.6x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes:\u003c\/td\u003e\n\u003ctd\u003e Twist-Lock retainer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes:\u003c\/td\u003e\n\u003ctd\u003eT2 Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":31975200587889,"sku":"ANT-4120","price":136.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/barlow-2-twist-lock-16x.jpg?v=1776459205"},{"product_id":"antares-barlow-lens-1-25-2x-multicoated-4121","title":"Antares 2X Barlow Lens - 1.25\" - UB2S","description":"\u003ch3 style=\"text-align: center;\"\u003eAntares Barlow Lens - 1.25\" - 2x\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eProduct Highlights:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAntares Barlow Lens - 1.25\" - 2x\u003c\/li\u003e\n\u003cli\u003e2x Increase of Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003e27 mm Aperture Doublet\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" Eyepieces and Accessories\u003c\/li\u003e\n\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003cli\u003eConventional Barlow Lens Functionality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\nAntares barlows will extend the focal length of your telescope for greater magnification. By generating negative spherical aberration they correct that generated by positive eyepieces and they also will increase eye relief. The 1.25\" UB2S is a fully multicoated 27 mm achromat that will double your focal length and has been specifically designed to perform off-axis with Plossl eyepieces.\n\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntares Model No:\u003c\/td\u003e\n\u003ctd\u003eUB2S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Type:\u003c\/td\u003e\n\u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e-NA-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eNegative Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFL Increase:\u003c\/td\u003e\n\u003ctd\u003e2x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":31975230767217,"sku":"ANT-4121","price":62.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/125-barlow-2x.jpg?v=1776458979"},{"product_id":"antares-barlow-lens-1-25-5x-multicoated-4123","title":"Antares 5X Barlow Lens - 1.25\" - UB5S","description":"\u003ch3 style=\"text-align: center;\"\u003eAntares Barlow Lens - 1.25\" - 5x\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eProduct Highlights:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAntares Barlow Lens - 1.25\" - 5x\u003c\/li\u003e\n\u003cli\u003e5x Increase of Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003e27 mm Aperture Doublet\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" Eyepieces and Accessories\u003c\/li\u003e\n\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003cli\u003eConventional Barlow Lens Functionality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAntares barlows will extend the focal length of your telescope for greater magnification. By generating negative spherical aberration they correct that generated by positive eyepieces and they also will increase eye relief. The 1.25\" UB5S is a fully multicoated 27 mm achromat that will increase your focal length by a factor of five, and has been specifically designed to perform off-axis with Plossl eyepieces.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntares Model No:\u003c\/td\u003e\n\u003ctd\u003eUB5S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Type:\u003c\/td\u003e\n\u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e-NA-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eNegative Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFL Increase:\u003c\/td\u003e\n\u003ctd\u003e5x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":31975271301233,"sku":"ANT-4123","price":62.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/125-barlow-5x.jpg?v=1776459056"},{"product_id":"antares-barlow-lens-2-2x-ed-multicoated-4124","title":"Antares 2X ED Barlow Lens - 2\" - 2XB-0.6","description":"\u003ch3 style=\"text-align: center;\"\u003eAntares Barlow Lens - 2\" - 2x - ED - Multicoated\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eProduct Highlights:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAntares Barlow Lens - 2\" - 2x\u003c\/li\u003e\n\u003cli\u003e2x Increase of Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" Eyepieces and Accessories\u003c\/li\u003e\n\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003cli\u003e0.6mm Filter Thread\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e2\" ED Barlow for 2\" eyepiece receptor barrel. 2\"- 1.25\" adapter with an eyepiece pressure band retainer is included. Also includes a 2\" to 1.25\" Adapter. Fully Multicoated optics.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAntares Model No:\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan color=\"#000000\" size=\"3\" face=\"Calibri\" style=\"color: #000000; font-family: Calibri; font-size: medium;\"\u003e2XB-0.6\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Type:\u003c\/td\u003e\n\u003ctd\u003eBarlow Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e-NA-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design:\u003c\/td\u003e\n\u003ctd\u003eNegative Doublet, W\/ ED Optics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFL Increase:\u003c\/td\u003e\n\u003ctd\u003e2x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes:\u003c\/td\u003e\n\u003ctd\u003e2\" to 1.25\" Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":31975313178737,"sku":"ANT-4124","price":74.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/2-2x-ed-barlow.jpg?v=1776459289"},{"product_id":"explore-scientific-3x-focal-extender-2-vxnlg","title":"Explore Scientific 3X Focal Extender - 2\" - FE03-020","description":"\u003ch3 style=\"text-align: center;\"\u003eExplore Scientific 3X Focal Extender - 2\"\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFocal Extender - 3X\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" or 2.0\" format eyepieces etc.\u003c\/li\u003e\n\u003cli\u003eIncrease magnification of your eyepieces\u003c\/li\u003e\n\u003cli\u003eFully EMD coated on all surfaces\u003c\/li\u003e\n\u003cli\u003eIncreased eye relief with longer f. l. eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis Explore Scientific 3X Focal Extender - 2\" size will be useful with any of your eyepieces to increase their inherent magnification by extending the apparent focal length of your telescope's optics. The Explore Scientific 3X Focal Extender (2.0-inch O.D.), accepts both 1.25-inch O.D. and 2.0-inch O.D. format eyepieces and camera adapters. Fully EMD-Coated on all air-to-air lens surfaces, with all lens elements edge-blackened to produce superior contrast, this focal extender adds some real versatility to your telescope.\u003c\/p\u003e\n\u003cp\u003eIncreases the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Frequently, lower magnification eyepieces such as the 30 mm 82 Degree Series Waterproof Eyepiece have better eye relief than higher power models. When using a focal extender to increase your magnification, you get to enjoy the generous eye relief of the lower power eyepiece. This fact will be beneficial to all observers, but especially for those astronomers who wear glasses. Includes a 1.25\" adapter for those eyepieces you have, and also a soft carry bag to store and protect this extender.\u003c\/p\u003e\n\u003cp\u003eThis product comes with a Limited USA One Year Warranty from Explore Scientific, which converts to the Explore STAR Transferable Extended Life of the Product Warranty, when product is registered within 60 days of purchase.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer:\u003c\/td\u003e\n\u003ctd\u003eExplore Scientific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMfr. SKU:\u003c\/td\u003e\n\u003ctd\u003eFE03-020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction:\u003c\/td\u003e\n\u003ctd\u003e3X Focal Extender\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength:\u003c\/td\u003e\n\u003ctd\u003e125 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth:\u003c\/td\u003e\n\u003ctd\u003e66 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size:\u003c\/td\u003e\n\u003ctd\u003e2.0\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight:\u003c\/td\u003e\n\u003ctd\u003e1.70 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":39405857964145,"sku":"EXP-FE03-020","price":411.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/FE03-020_1.jpg?v=1776459013"},{"product_id":"sky-mentor-5x-five-element-barlow-lens-1-25","title":"Sky Mentor 5X Five Element Barlow Lens 1.25\"","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAbout the Sky Mentor 5X Five Element Barlow Lens...\u003c\/h3\u003e\n\u003c\/center\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe \u003cb data-mce-fragment=\"1\"\u003eSky Mentor 5X Five Element Barlow Lens \u003c\/b\u003ewill come in handy for extending the effective focal length of short-tube telescopes, to give them more magnifying power.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe \u003cb data-mce-fragment=\"1\"\u003eSky Mentor 5X Barlow\u003c\/b\u003e employs a sophisticated 5-element lens configuration engineered to render optically flatter, sharper images than standard barlows can provide.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe lenses of the \u003cb data-mce-fragment=\"1\"\u003eSky Mentor 5X Five Element Barlow Lens\u003c\/b\u003e are fully multi-coated to ensure high light throughput, and their edges blackened for improved contrast. A non-marring compression ring secures the eyepiece in place. Slotted barrels prevent accidental slip-outs, and dual rubber grip bands on the housing ensure easy handling. One-year limited warranty.\u003c\/p\u003e\n\u003ccenter data-mce-fragment=\"1\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eSky Mentor 5X Five Element Barlow Lens Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eThis premium, high-power barlow lens increases the magnification of any eyepiece by 5x\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIdeal for high-power lunar and planetary viewing, and solar system imaging with a webcam\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFive-element lens design renders optically flatter, sharper images than standard barlows\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFully multi-coated optics for high light throughput; glare-threaded barrels for superior contrast\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNon-marring compression ring secures eyepieces in place\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e1.25\" Barrel size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ccenter data-mce-fragment=\"1\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eSky Mentor 5X Five Element Barlow Lens\u003c\/h2\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eSpecifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp data-mce-fragment=\"1\"\u003eEquipment Type: Barlow Lens\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eMagnification Factor: 5X\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e# of Elements: 5\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCoatings: Fully multi-coated\u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":40099589914737,"sku":"Skymen5x125","price":175.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/IMG_7029_02c21658-031e-4ea0-8a17-350221f8b5f4.jpg?v=1776459258"},{"product_id":"skymentor-1-25-inch-image-rectifier-for-newtonian-reflector-astronomical-telescope","title":"Skymentor 1.25 inch Image Rectifier for Newtonian Reflector Astronomical Telescope","description":"\u003cdiv class=\"titlebar\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"titlebar\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"content\"\u003e\n\u003cp\u003e\u003cspan\u003eSkymentor 1.25 inch Image Rectifier for Newtonian Reflector Astronomical Telescope\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Detail:\u003c\/strong\u003e\u003cbr\u003eThis Skymentor Image Rectifier Universal Erecting Prism is a new roof design for Newtonian Reflector Telescopes and 2X means that it has a 2x Barlow effect, It not only rectifies the image but also magnifies the image by 2x. \u003cbr\u003e\u003cstrong\u003eSpecifications: \u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBody Material: Aluminum\u003c\/li\u003e\n\u003cli\u003ePrism: BAK4\u003c\/li\u003e\n\u003cli\u003ePrism Type: Roof\u003c\/li\u003e\n\u003cli\u003eCoated: Multi-Coated Lens\u003c\/li\u003e\n\u003cli\u003eAdapter:1.25 Inches\u003c\/li\u003e\n\u003cli\u003eMagnification 2x\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003ePackage Include:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Image Rectifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":40250061881457,"sku":"SM-R90812","price":49.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/IMG_20230908_151415.jpg?v=1776459304"},{"product_id":"skymentor-1-5x-image-rectifier-erect-image-bak-4-newtonian","title":"Skymentor 1.5x Image Rectifier Erect Image Bak-4 - Newtonian","description":"\u003cdiv class=\"titlebar\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"titlebar\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"content\"\u003e\n\u003cp\u003e\u003cspan\u003eSkymentor 1.25 inch Image Rectifier for Newtonian Reflector Astronomical Telescope\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Detail:\u003c\/strong\u003e\u003cbr\u003eThis Skymentor Image Rectifier Universal Erecting Prism is a new roof design for Newtonian Reflector Telescopes,and 1.5X means that it has a 1.5x Barlow effect, It not only rectifies the image but also magnifies the image by 1.5x.It also with standard M42x0.75mm thread for Astro-photography. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications: \u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBody Material: Aluminum\u003c\/li\u003e\n\u003cli\u003ePrism: BAK4\u003c\/li\u003e\n\u003cli\u003ePrism Type: Roof\u003c\/li\u003e\n\u003cli\u003eCoated: Multi-Coated Lens\u003c\/li\u003e\n\u003cli\u003eAdapter:1.25 Inches\u003c\/li\u003e\n\u003cli\u003eScew: M42X0.75mm (Astrophotography)\u003c\/li\u003e\n\u003cli\u003eMagnification 1.5x\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003ePackage Include:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Image Rectifier\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":40250063814769,"sku":"SM-R90813","price":99.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/s-l1600.jpg?v=1776458995"},{"product_id":"paul-rini-5x-barlow-1-25-made-in-taiwan-open-box","title":"Paul Rini 5x Barlow 1.25\" - Made in Taiwan (OPEN BOX)","description":"\u003ch2 style=\"text-align: center;\"\u003ePaul Rini 5x Barlow 1.25\" - Made in Taiwan (OPEN BOX)\u003c\/h2\u003e","brand":"Paul Rini","offers":[{"title":"Default Title","offer_id":40436877328497,"sku":"USED121203","price":89.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/IMG_20231212_145213.jpg?v=1776458981"},{"product_id":"sky-mentor-3x-barlow-lens-with-1-25inch-barrel-barlow3x","title":"Sky Mentor 3x Barlow - 1.25\" - BARLOW3X","description":"\u003ch2 style=\"text-align: center;\"\u003eSky Mentor 3x Barlow - 1.25\"\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBarlow Lens - 1.25\"\u003c\/li\u003e\n\u003cli\u003e3x Increase of Nominal Focal Length\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" Eyepieces and Accessories\u003c\/li\u003e\n\u003cli\u003eFully Multicoated\u003c\/li\u003e\n\u003cli\u003eConventional Barlow Lens Functionality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSky Mentor Barlows will extend the focal length of your telescope for greater magnification. By generating negative spherical aberration they correct that generated by positive eyepieces and they also will increase eye relief. \u003c\/p\u003e","brand":"Sky Mentor","offers":[{"title":"Default Title","offer_id":40475055784049,"sku":"SMT-BARLOW3X","price":65.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/3X_Barlow.jpg?v=1776458999"},{"product_id":"tele-vue-2x-big-barlow-2-bwc-2211","title":"Tele Vue 2X BIG Barlow - 2\" - BWC-2211","description":"\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 2X BIG Barlow - 2\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eProperly designed \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e do wonderful things: They amplify power, slow the \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s f\/# (improving eyepiece sharpness), and give designers the opportunity to compensate for \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e aberrations.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTele Vue Barlow Lenses\u003c\/b\u003e use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f\/4 \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lenses\u003c\/a\u003e even improve our competitor'''s \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescopes\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"I originally designed the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e line to complement the high performance of our \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e. Only 2 elements of high index glass were required to reduce all aberrations to well below the airy disc in an f\/4 system. It has taken a good 15 years, but I think we'''re finally laying to rest the popular myth of the \"degrading Barlow.\" In a 1997 Sky \u0026amp; Telescope review, Terrence Dickenson wrote \"...Technology has erased the old objections. A modern \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e'''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e and their clones have built-in Barlows - ample evidence that the lens is not some detrimental intruder.\" Thanks Terry, I couldn'''t agree more.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2X BIG Barlow - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003eProduct design and execution deliver consummate satisfaction\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFeatures include parfocal 1.25\" filter threads, captive lock screws that won't fall out and full multi-coatings\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEvery Tele Vue Barlow must pass the same rigorous f\/4, full field testing as all their eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2X BIG Barlow - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eOptics Type: 2X Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 2\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Full multi-coatings\u003c\/p\u003e\n\u003cp\u003eWeight: 0.75 lbs.\u003c\/p\u003e\n\u003cp\u003eParfocal: Yes\u003c\/p\u003e\n\u003cp\u003eThreaded: Yes\u003c\/p\u003e\n\u003cp\u003eGlass Type: High Index\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: BWC-2211\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default","offer_id":41594873282673,"sku":"TEL-BWC-2211","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/BWC_2211_BigBarlow_2x_v3.jpg?v=1776459109"},{"product_id":"tele-vue-2x-barlow-1-25-blw-2125-pre-owned","title":"Tele Vue 2X Barlow - 1.25\" - BLW-2125 (pre-owned)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 2X Barlow - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eProperly designed \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e do wonderful things: They amplify power, slow the \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s f\/# (improving eyepiece sharpness), and give designers the opportunity to compensate for \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e aberrations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTele Vue Barlow Lenses\u003c\/b\u003e use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f\/4 \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lenses\u003c\/a\u003e even improve our competitor''s \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescopes\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"I originally designed the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e line to complement the high performance of our \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e. Only 2 elements of high index glass were required to reduce all aberrations to well below the airy disc in an f\/4 system. It has taken a good 15 years, but I think we''re finally laying to rest the popular myth of the \"degrading Barlow.\" In a 1997 Sky \u0026amp; Telescope review, Terrence Dickenson wrote \"...Technology has erased the old objections. A modern \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e and their clones have built-in Barlows - ample evidence that the lens is not some detrimental intruder.\" Thanks Terry, I couldn''t agree more.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2X Barlow - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduct design and execution deliver consummate satisfaction\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFeatures include parfocal-ization, 1.25\" filter threads, captive lock screws that won''t fall out and full multicoatings\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEvery Tele Vue Barlow must pass the same rigorous f\/4, full field testing as all their eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 2X Barlow - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eOptics Type: 2X Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Full multi-coatings\u003c\/p\u003e\n\u003cp\u003eWeight: 0.3 lbs.\u003c\/p\u003e\n\u003cp\u003eParfocal: Yes\u003c\/p\u003e\n\u003cp\u003eThreaded: Yes\u003c\/p\u003e\n\u003cp\u003eGlass Type: High Index\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: BLW-2125\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":43184154771569,"sku":"USED042905","price":159.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/486-1-thumb.jpg?v=1777493285"},{"product_id":"tele-vue-5x-powermate-1-25-pre-owned","title":"Tele Vue 5X Powermate - 1.25\" - (Pre-owned)","description":"\u003cp\u003e\u003cspan style=\"color: rgb(242, 7, 7);\"\u003e\u003cstrong\u003eIn excellent condition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 5X Powermate - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eTo understand the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e, we must first understand the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e. Barlows amplify the power of a telescope. They can be considered \"focal reducers\" for eyepieces, or \"focal extenders\" for objectives. Terence Dickenson, in his Barlow test report in \u003ci\u003eSky and Telescope\u003c\/i\u003e says: \"Technology has erased the old objections. A modern Barlow will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e and their clones have built-in Barlows, ample evidence that the lens is not some detrimental intruder.\" Thanks, Terence, for laying the myth of the degrading \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e to rest.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA high quality \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e must be properly designed and manufactured in order to avoid compromising a \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s color and spherical aberration corrections. The \"invisibility\" of Tele Vue''s 2-element Barlows has been noted in test reports in the astronomy magazines. However, by the nature of its negative power lens, a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will do more than just increase magnification, regardless of the number of elements.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe diverging rays leaving the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e result in moving the exit pupil further out, thereby extending the eye relief. In short to medium focal length eyepieces the change is not noticeable. However, in the case of long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e, the increase can be significant and not without performance consequences.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVignetting can occur due to the altered ray path, when the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e''s lenses are not large enough in diameter to allow all the rays to make it through. Shorter Barlows, or ones with too much magnification, only exacerbate the problem because the ray path entering the eyepiece is steeper.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTeleVue had to go beyond the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept to achieve the goal of a compact, high power, fully corrected image amplifier. The Powermate consists of a negative doublet plus a positive \"pupil-correcting\" doublet. This 4-element system provides the magnifying function of a \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e without its limitations by restoring the field rays back to their original direction, as if the \u003cb\u003eTeleVue Powermate\u003c\/b\u003e were not there. The result is a pure magnification increase.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"While \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e are powerful tools, the negative element defining them also limits their ability. The simple negative element Barlow increases eyepiece eye-relief. With short focal length eyepieces the effect is negligible. However, on long focal length \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e the exit pupil position moves well beyond the designer''s intended position, resulting in vignetting with many eyepieces. This is why \"Shorty\" Barlows in particular, with their strong negative element often vignette and degrade long focus eyepieces. My 4-element form picks up where the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e concept can go no further. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e is a technically universal solution, using a positive field lens to redirect field rays. The result is an exit pupil that stays where the eyepiece designer intended. With freedom from aberrations, greater magnification potential, and compact size, I hope you''ll agree \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Powermate\u003c\/a\u003e raises the standard for image amplification.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 5X Powermate - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eTelecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh performance for image amplification, CCD or film.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigher magnifications are possible with high optical performance compared to \"doubling up\" Barlows.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll will reach parfocal point in star diagonals, except for the 2\", 2x which comes very close.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIn addition to full multi-coating, Powermates include other Tele Vue special touches such as safety undercuts where practical on the chrome barrel and captive lock screws that can''t fall out, and filter threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 5X Powermate - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eEquipment Type: 5X Powermate\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eWeight: 0.40 lbs.\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: PMT-5126\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":43242913398897,"sku":"USED051403","price":279.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/485-1-thumb_1.jpg?v=1778781660"},{"product_id":"tele-vue-3x-barlow-1-25-pre-owned","title":"Tele Vue 3X Barlow - 1.25\" (Pre-owned)","description":"\u003cp\u003e\u003cspan style=\"color: rgb(241, 9, 9);\"\u003e\u003cstrong\u003eIn excellent condition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 3X Barlow - 1.25\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eProperly designed \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lenses\u003c\/a\u003e do wonderful things: They amplify power, slow the \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s f\/# (improving eyepiece sharpness), and give designers the opportunity to compensate for \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepiece\u003c\/a\u003e aberrations.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTele Vue Barlow Lenses\u003c\/b\u003e use multi-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss. Observed performance is aberration free, even when tested with f\/4 \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e. \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lenses\u003c\/a\u003e even improve our competitor''s \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescopes\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"I originally designed the \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Barlow Lens\u003c\/a\u003e line to complement the high performance of our \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e. Only 2 elements of high index glass were required to reduce all aberrations to well below the airy disc in an f\/4 system. It has taken a good 15 years, but I think we''re finally laying to rest the popular myth of the \"degrading Barlow.\" In a 1997 Sky \u0026amp; Telescope review, Terrence Dickenson wrote \"...Technology has erased the old objections. A modern \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eBarlow lens\u003c\/a\u003e will not degrade your \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e''s optics. Anyone telling you otherwise is using outdated information. Moreover, the highly regarded Nagler \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e and their clones have built-in Barlows - ample evidence that the lens is not some detrimental intruder.\" Thanks Terry, I couldn''t agree more.\" --Al Nagler\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e. Don''t forget \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Dioptrx\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e, too!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 3X Barlow - 1.25\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduct design and execution deliver consummate satisfaction\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFeatures include parfocal-ization, 1.25\" filter threads, captive lock screws that won''t fall out and full multicoatings\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll Tele Vue Barlows now use brass clamp rings for secure, non marring holding of eyepieces and accessories\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMulti-coated high index glasses for optimum aberration correction, exceptional contrast with virtually no light loss\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eEvery Tele Vue Barlow must pass the same rigorous f\/4, full field testing as all their eyepieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 3X Barlow - 1.25\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eOptics Type: 3X Barlow Lens\u003c\/p\u003e\n\u003cp\u003eBarrel Size: 1.25\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Full multi-coatings\u003c\/p\u003e\n\u003cp\u003eWeight: 0.4 lbs.\u003c\/p\u003e\n\u003cp\u003eParfocal: Yes\u003c\/p\u003e\n\u003cp\u003eThreaded: Yes\u003c\/p\u003e\n\u003cp\u003eGlass Type: High Index\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: BLW-3125\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":43242972446833,"sku":"USED051405","price":149.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/488-1-thumb_1.jpg?v=1778782009"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/collections\/Powermate_right_1.jpg?v=1776869664","url":"https:\/\/khanscope.com\/collections\/barlows-focal-extenders.oembed","provider":"Khan Scope Centre","version":"1.0","type":"link"}