{"title":"New from Askar!  111F \u0026 131F Quad Flat Field Refractors with Optional Dedicated Reducers!","description":"","products":[{"product_id":"askar-111f-111mm-f6-9-quadruplet-flat-field-apo-refractor-111f","title":"Askar 111F - 111 mm f\/6.9 Quadruplet Flat-Field APO Refractor - 111F - In Stock!","description":"\u003cdiv class=\"card__header\"\u003e\n\u003ch3 style=\"text-align: center;\" class=\"card__title heading h3\"\u003eAskar 111 mm Quad ED APO Flat-Field Refractor\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\" class=\"card__title heading h3\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" class=\"card__title heading h3\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_Hero_Banner.jpg?v=1778784937\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003eAskar 111F Flat Field Quad Refractor Highlights\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/11F_Highlight_Icons.png?v=1778784937\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003c\/span\u003eThe Askar 111F has an aperture of 111 mm, a 766mm focal length, and a native focal ratio of 6.9, suitable for various uses including astrophotography and daytime photography.\u003c\/p\u003e\n\u003cp\u003eThe Askar 111F uses a quadruplet lens design (three elements in the front, one in the rear), which includes an ED glass element to effectively reduce chromatic aberration. The main tube features a built-in baffle that further blocks stray light and enhances image quality. Featuring a self-flattened design, the Askar 111F Quad also supports full-frame imaging.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_Flat_Frame.jpg?v=1778784938\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThis 111 mm f\/6.9 Quadruplet Refractor has a self-flattened design that allows users to avoid calculating the back focus and buying an additional flattener.  After attaching the imaging accessories, users can use it for photography after the OTA is in focus. This further reduces the cost and improves the pleasure imaging through your 111F.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAdhering to Askar's consistent design philosophy, the Askar 111F emphasizes detail and user experience, striving to reduce the cost of use. The lens hood is retractable, further shortening the overall length and enhancing portability. The lens tube utilizes high-quality CNC machining and painting processes. Its appearance continues the F-series' classic blue and white color scheme, presenting a simple and elegant aesthetic.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 111F comes standard with a photographic extension tube, which is designed with a 2-inch filter thread. It includes adapters with M48*0.75 and M54*0.75 specifications, ensuring compatibility with DSLR cameras or astronomy cameras to meet diverse needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_4_Panel_Highlights.jpg?v=1778784937\" alt=\"\"\u003e\u003c\/span\u003e\u003cspan\u003eThe handle of the Askar 111F is equipped with a finder base slot. Additionally, both sides of the focuser feature finder bases. This not only allows for changing the finder scope position without disassembly but also provides more locations for installing other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eThe Askar 111F is equipped with a 3-inch rack-and-pinion dual-speed focuser supporting 1:10 fine adjustment. The fine adjustment knob includes a protective cap to prevent damage. The rear of the focuser connects to a 360° graduated rotator, allowing for precise angle adjustments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eThe dovetail plate is a 300mm long Vixen-style plate, equipped with 1\/4-inch and 3\/8-inch screw holes, enabling direct connection to a tripod.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_Feature_Identification.jpg?v=1778784991\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_WITB.webp?v=1778784936\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_Reducer.webp?v=1778786678\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe optional 0.74x reducer, shown above, brings the Askar 111F's focal ratio down to F\/5.1.  This reducer features a triplet optical design and supports a 44mm full-frame image circle.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e111mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e766mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ef\/6.9\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e73mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e91mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e132mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e142mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e43mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e61mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e102mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e112mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003e664mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e751mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e728mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e815mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e30mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e5.74kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e6.76kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eM78×1-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e A 111F OTA，a pair of tube rings, a handle, a 300mm Vixen dovetail plate,a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1707197718594\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"cbox-15 p_loopItem\" id=\"saf-detail-1\"\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":43243334008945,"sku":"ASK-111F","price":2099.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_161c7dcd-d9f0-4cbc-8251-64e5aeb18789.webp?v=1778786257"},{"product_id":"askar-131f-131-mm-f-7-5-quadruplet-flat-field-apo-refractor-131f","title":"Askar 131F - 131 mm f\/7.5 Quadruplet Flat-Field APO Refractor - 131F","description":"\u003cdiv class=\"card__header\"\u003e\n\u003ch3 style=\"text-align: center;\" class=\"card__title heading h3\"\u003eAskar 131 mm Quad ED APO Flat-Field Refractor\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\" class=\"card__title heading h3\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eBoy, we sold out fast!  Pre-Order now for the 2nd shipment!\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" class=\"card__title heading h3\"\u003e\n\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\" class=\"card__title heading h3\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Hero.jpg?v=1778788114\" alt=\"\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"text-align: center;\"\u003eAskar 131F Flat Field Quad Refractor Highlights\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Highlight_Icons.png?v=1778788688\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Askar 131F is a telescope OTA with an aperture of 131mm, a focal length of 983mm, and a native focal ratio of F\/7.5. It is designed for both visual observation and astrophotography.\u003c\/p\u003e\n\u003cp\u003eThe quadruplet lens system—comprising three front elements and one rear element, including one piece of ED glass—effectively minimizes chromatic aberration and supports 44mm full-frame imaging. \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131_Full_Frame.jpg?v=1778788986\"\u003e\u003c\/p\u003e\n\u003cp\u003eThis 131 mm Quadruplet Refractor has a self-flattened design that allows users to avoid calculating the back focus and buying an additional flattener.  After attaching the imaging accessories, users can use it for photography after the OTA is in focus. This further reduces the cost and improves the pleasure imaging through your 131F.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAdhering to Askar's consistent design philosophy, the Askar 131F emphasizes detail and user experience, striving to reduce the cost of use. The lens hood is retractable, further shortening the overall length and enhancing portability. The lens tube utilizes high-quality CNC machining and painting processes. Its appearance continues the F-series' classic blue and white color scheme, presenting a simple and elegant aesthetic.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 131F comes standard with a photographic extension tube, which is designed with a 2-inch filter thread. It includes adapters with M48*0.75 and M54*0.75 specifications, ensuring compatibility with DSLR cameras or astronomy cameras to meet diverse needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 111F is equipped with a 3-inch rack-and-pinion dual-speed focuser supporting 1:10 fine adjustment. The fine adjustment knob includes a protective cap to prevent damage. The rear of the focuser connects to a 360° graduated rotator, allowing for precise angle adjustments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Accessory_Panels.jpg?v=1778789530\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eThe handle of the Askar 131F is equipped with a finder base slot. Additionally, both sides of the focuser feature finder bases. This not only allows for changing the finder scope position without disassembly but also provides more locations for installing other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003eThe 300 mm Losmandy dovetail plate of the Askar 131F is compatible with most equatorial mounts and bases on the market.  The dovetail plate is designed with multiple holes, which makes it easy to adjust the position.  The entire plate is manufactured using high-quality CNC machining.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_with_Designations.jpg?v=1778789794\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_WITB.jpg?v=1778789830\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Reducer_Main.webp?v=1778790264\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe optional 0.74x reducer, shown above, brings the Askar 131F's focal ratio down to F\/5.6.  This reducer features a triplet optical design and supports a 44mm full-frame image circle.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e131mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e983mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ef\/7.5\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e73mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e91mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e131mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e141mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e43mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e61mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e101mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e111mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003e878mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e963mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e941mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e1026mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e30mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e7.9kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e9.4kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eM78×1-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e A 131F OTA, a pair of tube rings, a handle, a 300mm Losmandy dovetail plate, a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1707197718594\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"cbox-15 p_loopItem\" id=\"saf-detail-1\"\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":43243464163441,"sku":"ASK-131F","price":2799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Front_Right.webp?v=1778790377"},{"product_id":"askar-0-74x-reducer-for-the-111f-111f-red","title":"Askar 0.74x Reducer for the 111F - 111F-RED","description":"\u003cdiv class=\"card__header\"\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003ePre-Order Now for Arrival at Khan on May 22!\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/111F_Reducer_Hero.jpg?v=1778790885\"\u003e\u003c\/span\u003e\u003cspan\u003eThe 0.74× reducer brings the Askar 111F's focal ratio down to F5.1, delivering a faster optical system while incorporating built-in field-flattening correction to effectively eliminate field curvature - ensuring sharp and clear stars from the center to the very edges of the frame. The shorter focal ratio provides a wider field of view and shorter exposure times, making it particularly well-suited for capturing expansive nebulae, star clusters, and faint or fast-moving celestial objects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 111F 0.74× Reducer features a triplet optical design and supports a 44mm full-frame image circle. Its back focus is 55mm (measured from the M48 thread), and both ends feature M68×1 threads for optimal adaptability and stability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 111F photographic extension tube includes M54×0.75 and M48×0.75 adapters, allowing for direct and convenient connection to the 111F 0.74× reducer. The reducer’s rear adapter ring features a built-in M48×0.75 standard 2-inch filter thread, enabling direct installation of various astronomical filters to accommodate different imaging needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe entire reducer is precision CNC-machined and comes with front and rear metal threaded caps to protect the optics from dust when not in use.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card__section\"\u003e\n\u003cdiv class=\"rte text--pull\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e （After attaching）111F Focal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e566mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e （After attaching）111F Focal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ef\/5.1\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLens Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTriplet design\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBack Focus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e55mm（from the base of M48 male thread）\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e0.5kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eM68*1\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":43243657724017,"sku":"ASK-111F-RED","price":419.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Reducer_Main.webp?v=1778790264"},{"product_id":"askar-0-74x-reducer-for-the-131f-131f-red","title":"Askar 0.74x Reducer for the 131F - 131F-RED","description":"\u003cdiv class=\"card__header\"\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003ePre-Order Now for Arrival at Khan on May 22!\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_RED_Banner.jpg?v=1778791392\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis 0.74× Reducer is the ideal companion for the Askar 131F telescope, reducing the focal ratio from f\/7.5 to f\/5.6. This dramatically shortens exposure times, allowing you to effortlessly capture wide-field nebulae,dense star clusters, as well as faint or fast-moving celestial objects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt also incorporates field-flattening correction capabilities,effectively eliminating field curvature to ensure sharp, clear stars from the center to the edges of the frame.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFeaturing a triplet optical lens design, this reducer supports a 44mm full-frame image circle. It has a standard back focus of 55mm (measured from the M48 thread), with M72×1 threads on both ends.The package includes an extension tube and comes with both M54×0.75 and M48×0.75 adapter rings that connect directly to the reducer for easy installation.The rear adapter ring features a built-in M48×0.75 thread, enabling direct attachment of 2-inch filters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConstructed using CNC machining, the reducer is equipped with metal thread caps on both ends. These caps protect the optics and offer convenient dust-proof storage, reflecting the product's professional quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card__section\"\u003e\n\u003cdiv class=\"rte text--pull\"\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e （After attaching）131F Focal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e733.6mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e （After attaching）131F Focal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ef\/5.6\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLens Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTriplet design\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBack Focus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e55mm（from the base of M48 male thread）\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e0.56kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eM72*1\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":43243704025201,"sku":"ASK-131F-RED","price":419.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/131F_Reducer_Standing.webp?v=1778791573"}],"url":"https:\/\/khanscope.com\/fr\/collections\/new-from-askar-111f-131f-quad-flat-field-refractors-with-optional-dedicated-reducers.oembed","provider":"Khan Scope Centre","version":"1.0","type":"link"}