{"product_id":"np101is-apo-imaging-system-refractor-telescope-npi-4057","title":"Tele Vue NP-101is APO - Imaging System Refractor Telescope- NPI-4057","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue NP101is APO - Imaging System Refractor Telescope...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eFor 30 years, \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e has pushed the boundaries of APO refractors, as well as \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e, to the recognized pinnacle of performance. We were gratified but not surprised that \u003ci\u003eBackyard Astronomer''s Guide\u003c\/i\u003e said of the NP101: \"optics don''t get any better than this.\" No wonder \u003ci\u003eSky and Telescope\u003c\/i\u003e rated the \u003cb\u003eTeleVue NP101is APO - Imaging System Refractor Telescope\u003c\/b\u003e tops and selected it as the test instrument for its landmark review of the SBIG STL11000 CCD camera . The \"is\" versions of the Tele Vue-60, 102i, NP101 and NP127 retain the exemplary wide field and planetary visual capability while adding new \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e features to make imaging easier and more flexible.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e was determined to make the NP series optically, mechanically, and functionally as perfect as possible for imaging up to 50mm diagonal chips without penalty to its near ideal visual operation. How? By applying the developments created for the Tele Vue-60is to the new \u003cb\u003eTeleVue NP101is APO - Imaging System Refractor Telescope\u003c\/b\u003e and NP127is and then going beyond. Combine with a \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\" target=\"blank\"\u003eTeleVue Mount\u003c\/a\u003e for excellence in \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=18\" target=\"blank\"\u003eastrophotography\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003eTeleVue NP101is APO - Imaging System Refractor Telescope\u003c\/b\u003e (540mm, f\/5.4, 4\") and NP127 (660mm, f\/5.2, 5\") maintain their optical specifications yet with redesigned 4-element \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e optical systems. Larger rear lens groups absolutely minimize vignetting in formats up to 50mm diagonal. For these large chips an optional field corrector was developed so the corners of the newly brightened edges would virtually be as perfect as the center of the field.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eNext, to take full advantage of the larger lenses, \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e developed a larger focuser and draw tube having a 3\" front aperture and 2.4\" rear aperture. This eliminates any restriction of the larger diameter converging light cone. They build and test the rack and pinion focuser into the \u003cb\u003eTeleVue NP101is APO - Imaging System Refractor Telescope\u003c\/b\u003e to hold 12 lbs. of weight, yet still permit extremely fine focusing control via a 10:1 dual speed pinion assembly. This new \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e draw tube also permits quick change from visual to imaging operation and allows full camera rotation without focus change. In addition, it has the capability to correct for any residual focal plane tilt and accepts a \"position stop\" for our digital micrometer to allow repeatable focus measurement to 0.0001\".\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo maintain squareness to the optical axis while changing camera orientation, the draw tube on the \u003cb\u003eTeleVue NP101is APO - Imaging System Refractor Telescope\u003c\/b\u003e has four lock screws that tighten against a taper on the \"imaging insert\" ring. This insert is threaded to accept \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e'''s new Imaging System accessories including large diameter extension tubes, \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\" target=\"blank\"\u003eTeleVue Optical Accessories\u003c\/a\u003e, and camera and CCD attachments, all with mating threads.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe 10:1 dual speed focuser custom designed by Starlight Instruments and standard on the \u003cb\u003eTeleVue NP101is APO - Imaging System Refractor Telescope\u003c\/b\u003e, provides extremely sensitive focus adjustment, measurable with the optional Digital Micrometer Kit to better than 1\/10,000\". Also, the optional Focusmate Driver permits electronic motor control of the focusing process. The \u003ca href=\"http:\/\/www.khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\" target=\"blank\"\u003eTeleVue Telescope\u003c\/a\u003e Focusmate Driver has direction push-buttons and adjustable speed. A tap on the button permits vibration-free focusing in steps as small as approximately 0.0005\". The Focusmate Driver can be remotely computer controlled with optional Focusmaster Computer Interface.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDon'''t forget, we carry plenty of \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\" target=\"blank\"\u003eTeleVue Accessories\u003c\/a\u003e, too! Look for \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\" target=\"blank\"\u003eTeleVue Telescope Eyepieces\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\" target=\"blank\"\u003eTeleVue Telescope Filters\u003c\/a\u003e for visual observers - as well as \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=12\" target=\"blank\"\u003eTeleVue Finderscopes\u003c\/a\u003e and \u003ca href=\"http:\/\/khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=9\" target=\"blank\"\u003eTeleVue Dioptrx\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue NP101is APO - Imaging System Refractor Telescope Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDual speed knobs are on the right side of the telescope only, the 1:1 left side knob is the classic 5-hole Tele Vue style.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll knobs have knurled rubber grip rings\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eNew draw tube also permits quick change from visual to imaging operation and allows full camera rotation without focus change.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAs perfect as possible for imaging up to 50mm diagonal chips without penalty to its near ideal visual operation.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eLarger focuser and draw tube having a 3\" front aperture and 2.4\" rear aperture.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eInsert threaded to accept Tele Vue''s new Imaging System accessories including large diameter extension tubes, optical accessories, and camera and CCD attachments, all with mating threads.\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003ePackage Includes: Enlarged focuser with 3\" entrance aperture and 2.4\" exit aperture, Focuser body has brass clamp ring with 2-lock knobs, Accessory end-ring with tilt capability and 4-lock knobs, Imaging insert threaded for Imaging System components, 2\" accessory insert for visual or other 2\" accessories, Focusmate dual-speed focuser 10:1, Sliding metal dew shield, Screw-on metal lens cover and Hard-shell carry case\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 NP101is APO - Imaging System Refractor Telescope Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eType: APO (Nagler-Petzval) Refractor\u003c\/p\u003e\n\u003cp\u003eElements\/Groups: 4\/2\u003c\/p\u003e\n\u003cp\u003eObjective (mm): 101\u003c\/p\u003e\n\u003cp\u003eFocal Length (mm): 540\u003c\/p\u003e\n\u003cp\u003eFocal Ratio (f\/#): 5.4\u003c\/p\u003e\n\u003cp\u003eDrawtube\/Focuser: 2.4-inch, Focusmate dual-speed rack\/pinion\u003c\/p\u003e\n\u003cp\u003eLength OTA (inch): 25.5\u003c\/p\u003e\n\u003cp\u003eWeight OTA\/Std. Config (lbs): 10.65 \/ 10.65\u003c\/p\u003e\n\u003cp\u003eMaximum Visual Field (deg.): 4.9 (with 2-inch 55mm Plossl)\u003c\/p\u003e\n\u003cp\u003eMaximum Recommended Power (x) 250\u003c\/p\u003e\nTeleVue Product Number: NPI-4057","brand":"TeleVue","offers":[{"title":"Default","offer_id":10554800513,"sku":"TEL-NPI-4057","price":3852.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/3759-1-thumb.jpeg?v=1776459064","url":"https:\/\/khanscope.com\/en-fr\/products\/np101is-apo-imaging-system-refractor-telescope-npi-4057","provider":"Khan Scope Centre","version":"1.0","type":"link"}