{"title":"Askar F Series","description":"","products":[{"product_id":"askar-71f-flat-field-refractor","title":"Askar 71F Flat-Field Refractor (71F)","description":"\u003ch2\u003eAskar 71F Flat-Field Refractor\u003c\/h2\u003e\n\u003cp\u003eLightweight, compact, affordable, quadruplet flat-field Astrograph which can be used for visual observing and astrophotography.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/452d026e-05e4-46e3-b2c5-573111849bf3.jpg?v=1712683466\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Askar 71F is an OTA with an aperture of 71mm, a focal length of 490mm, and a native focal ratio of F6.9.\u003c\/p\u003e\n\u003cp\u003eThe Askar 71F adopts a quadruplet air-spaced APO lens design, including one piece of ED glass， which can effectively reduce chromatic aberration. The Askar 71F supports 44mm full-frame imaging with great performance of the surrounding star points.\u003c\/p\u003e\n\u003cp\u003eThe Askar 71F is a self-flattened design that allows users to avoid calculating the back focus and buying additional flattener, after attaching the imaging accessories, users can directly use it for shooting after the OTA is in focus. This further reduces the cost and improves the pleasure of shooting.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_a33cb80a-2b69-4a68-8613-bd364185954f.png?v=1712684145\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/71F.gif?v=1712684234\"\u003e\u003c\/p\u003e\n\u003cp\u003eWith practicality and versatility in mind, the Askar 71F's weight and size are effectively controlled, making it easy to carry and use. The Askar 71F OTA weighs only 2.5kg and the gross weight is 3kg (including the tube rings and dovetail plate).\u003c\/p\u003e\n\u003cp\u003eThe Askar 71F is versatile in its use, allowing for both visual observation and astrophotography. For users' convenience, we've also included three observation accessories standard for the 71F: an 8mm eyepiece, a 20mm eyepiece, and a 1.25-inch 45° erecting prism.\u003c\/p\u003e\n\u003cp\u003eThe 8mm eyepiece has a magnification of 60x and the 20mm eyepiece has a magnification of 25x. The Askar 71F can be used with different eyepieces depending on the target, and both eyepieces are ideal for viewing birds and landscapes.\u003c\/p\u003e\n\u003cp\u003eBoth eyepieces have a 1.25-inch barrel and a rubberized top for a soft and comfortable user experience.\u003c\/p\u003e\n\u003cp\u003eThe 1.25-inch 45° erecting prism provides correct left-to-right and down-to-up image views, making users easy for you to observing without the hassle of seeing images reversed up, down, left, and right.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/71F_71f821e9-b6de-4b4c-8a13-c3668615cfd5.gif?v=1712684258\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/d3e609f0-1bf3-45f4-8e56-959688475f63.jpg?v=1712684334\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Askar 71F also comes standard with a photographic extension tube, which includes M48*0.75\u0026amp;M54*0.75 adapters, it also contains a built-in 2-inch filter thread for easy shooting connections. No matter whether connecting a traditional DSLR camera or a professional astronomical camera, it is very convenient to use. When users go out, they can directly connect the shooting accessories to record the beautiful view at any time.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/71F_1bdc0275-e797-4f7d-9e27-f7f549810841.gif?v=1712684413\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe mechanical design of the Askar 71F itself adheres to Askar's consistent philosophy of taking into account the user's habits and minimizing the user's invisible costs.\u003c\/p\u003e\n\u003cp\u003eThe dew shield of the Askar 71F is a retractable design, further shortening the overall length and increasing portability. The entire lens tube of Askar 71F is crafted using high-quality CNC machining. All the inner of the Askar 71F's dew shield is covered with matting paint to effectively reduce stray light reflections. The overall blue and white color scheme makes the telescope look more refined.\u003c\/p\u003e\n\u003cp\u003eOn the handle bar of Askar 71F, it designs a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/p\u003e\n\u003cp\u003eIn terms of the focuser, the Askar 71F is equipped with a dual-speed R\u0026amp;P 2.4-inch rigid focuser, which has a 1:10 fine adjustment and a 360° scale field rotator at the rear end for precise angle adjustment.\u003c\/p\u003e\n\u003cp\u003eThe Askar 71F's dovetail plate is a 230mm standard Vixen dovetail plate, which slotted 1\/4 screw holes as well as 3\/8 screw holes for direct tripod attachment.\u003c\/p\u003e\n\u003cp\u003eAs an affordable and high-quality versatile self-flattened OTA, we look forward to the Askar 71F accompanying you to discover more beautiful!\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/016b09e9-50dc-4e88-953c-f71e2735bc49.jpg?v=1712684455\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a46898f5-cb86-4362-b888-5cc9e9c0df05.jpg?v=1712687702\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAperture size: 71mm\u003c\/li\u003e\n\u003cli\u003eFocal length: 490mm\u003c\/li\u003e\n\u003cli\u003eFocal ratio: f\/6.9\u003c\/li\u003e\n\u003cli\u003eObjective lens: Quadruplet air-spaced APO(including one ED glass)\u003c\/li\u003e\n\u003cli\u003eImage circle: 44mm\u003c\/li\u003e\n\u003cli\u003eMaximum accessory connection (with the focuser fully retreated) Imaging Mode : 82.5mm (from the base of M48×0.75 male thread) \/ 100.5mm（from the base of M54×0.75 male thread) Observing mode: 117mm（from the end of 1.25\" eyepiece holder）\/ 127mm（from the end of 2\" eyepiece holder）\u003c\/li\u003e\n\u003cli\u003eTotal length: 372.5mm(including 1.25\" adapter as dew shield contracted）\/ 430.9mm(including 1.25\" adapter as dew shield fully stretched）\/ 415mm(including the photographic adapter as dew shield contracted \/ 473.4mm(including the photographic adapter as dew shield fully stretched）\u003c\/li\u003e\n\u003cli\u003eNet weight 2.5kg\u003c\/li\u003e\n\u003cli\u003eGross weight: (Including tube ring\u0026amp;dovetail plate) 3.0kg\u003c\/li\u003e\n\u003cli\u003eRear-end thread type: M64×0.75-M54×0.75 \/ M54×0.75-M54×0.75 \/ M54×0.75-M48×0.75 (with M48×0.75 filter thread)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard package items A 71F OTA, a pair of tube rings, a handle, a Vixen 230mm dovetail plate, a set of photographic adapters, a 1.25\" 45° erecting prism, an 8mm eyepiece, a 20mm eyepiece Diagram :\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_ddc3817a-9a9f-4745-8b57-5ed764c5ace4.png?v=1712687913\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003e1. Lens Cap\u003c\/p\u003e\n\u003cp\u003e2. Dew Shield\u003c\/p\u003e\n\u003cp\u003e3. Dew Shield Locking Screw\u003c\/p\u003e\n\u003cp\u003e4. Tube Rings\u003c\/p\u003e\n\u003cp\u003e5. Vixen Style 230mm Dovetail Plate\u003c\/p\u003e\n\u003cp\u003e6. Multifunctional Handle Bar\u003c\/p\u003e\n\u003cp\u003e7. Main Tube\u003c\/p\u003e\n\u003cp\u003e8. Finder Base\u003c\/p\u003e\n\u003cp\u003e9. Fine Adjustment Knob\u003c\/p\u003e\n\u003cp\u003e10. Coarse Adjustment Knob\u003c\/p\u003e\n\u003cp\u003e11. 2\" to 1.25\" Adapter\u003c\/p\u003e\n\u003cp\u003e12. M64 to 2\" Adapter\u003c\/p\u003e\n\u003cp\u003e13. 360° Rotator Locking Screw\u003c\/p\u003e\n\u003cp\u003e14. 360° Rotator\u003c\/p\u003e\n\u003cp\u003e15. 1.25\" 45° Erecting Prism\u003c\/p\u003e\n\u003cp\u003e16. 1.25\" 8mm Eyepiece\u003c\/p\u003e\n\u003cp\u003e17. 1.25\" 20mm Eyepiece\u003c\/p\u003e\n\u003cp\u003e18. M64-M54 \/ M54-M48 Photographic Adapters\u003c\/p\u003e\n\u003cp\u003e19. Inspection Cheklist\u003c\/p\u003e\n\u003cp\u003e20. Product Warranty\u003c\/p\u003e\n\u003cp\u003e21. User Manual\u003c\/p\u003e\n\u003cp\u003e22. Certificate Card\u003c\/p\u003e\n\u003cp\u003e23. Carton\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/hhh.png?v=1712686802\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAskar Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca title=\"null\" href=\"https:\/\/www.sharpstar-optics.com\/npublic\/opdfjs\/web\/viewer.html?file=https%3A%2F%2Fomo-oss-file.thefastfile.com%2Fportal-saas%2Fnew2022072923460240318%2Fcms%2Ffile%2F%EF%BC%88%E5%B7%B2%E5%8E%8B%E7%BC%A9%EF%BC%89%E8%AF%B4%E6%98%8E%E4%B9%A6%EF%BC%88%E8%8B%B1%E6%96%87%EF%BC%89(4).pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e71F Flat-Field User's Manual \u003c\/a\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":45150260723941,"sku":"ASK-71F","price":923.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/askar-new-71f-flat-field-refractor-71f-astronomy-plus-1.png?v=1715808151"},{"product_id":"askar-0-75x-reducer-for-askar-71f-telescope","title":"Askar 0.75x Reducer for Askar 71F Telescope (ASKAR71FR)","description":"\u003ch2\u003eAskar 0.75x Reducer for Askar 71F Telescope\u003c\/h2\u003e\n\u003cdiv class=\"product info description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e\n\u003cdiv class=\"product info ca_above_desc\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute ca_above_desc\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv id=\"tab-1\" class=\"tab__content tab__content--active description\" data-content=\"tab-1\" aria-labelledby=\"tab-title-1\" aria-hidden=\"false\" role=\"tabpanel\"\u003e\n\u003cdiv class=\"product-view__description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cp\u003eGet ready for brighter images and a wider field of view for your Askar 71F! More details on this must have accessory coming soon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e0.75x Reducer for Askar 71F Telescope\u003c\/div\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3 data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003eTechnical Specifications \u003c\/h3\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e\n\u003ctable role=\"table\" class=\"table table--scope-row\" id=\"product-attribute-specs-table\" tabindex=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth role=\"rowheader\" scope=\"row\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eSKU Number\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd role=\"gridcell\" data-th=\"SKU Number\" class=\"data\"\u003eASK-71F-75XR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth role=\"rowheader\" scope=\"row\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eModel Number\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd role=\"gridcell\" data-th=\"Model Number\" class=\"data\"\u003e71F-75XR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth role=\"rowheader\" scope=\"row\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eOptical Modifier or Adapter\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd role=\"gridcell\" data-th=\"Optical Modifier or Adapter\" class=\"data\"\u003eReducer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3 data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003eIn the Box\u003c\/h3\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e\n\u003cul\u003e\n\u003cli\u003e0.75x Reducer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAskar Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv data-content-type=\"html\" data-appearance=\"default\" data-element=\"main\" data-decoded=\"true\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":45943509287141,"sku":"AS-ASKAR71FR","price":291.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/askar_75_reducer_71f_side_view.jpg?v=1777043423"},{"product_id":"ask-91f","title":"Askar 91F Flat-Field Refractor (91F)","description":"\u003ch1 class=\"e_text-8 s_title response-transition\"\u003eAskar 91F Flat-Field Refractor (91F)\u003c\/h1\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eSelf-flattened quadruplet Astrograph which can be used for visual observing and astrophotography. \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a3df0069-a893-4f9b-b959-77540ba5aeb6_1024x1024.jpg?v=1755195570\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe Askar 91F is an OTA with an aperture of 91mm, a focal length of 609mm, and a native focal ratio of F6.7.  \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/A_9a55ec00-0c9e-45c6-8a68-0c72daad9299_1024x1024.png?v=1755195912\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eThe optical design of the Askar 91F features a four-element configuration (three elements in the front and one in the rear), including one piece of ED glass， which can effectively reduce chromatic aberration.The Askar 91F supports 44mm full-frame imaging with great performance of the surrounding star points.\u003c\/p\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eThe Askar 91F is a self-flattened design that allows users to avoid calculating the back focus and buying additional flatteners. After attaching the imaging accessories, users can directly use it for shooting after the OTA is in focus. This further reduces the cost and improves the pleasure of shooting.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0478d269-2b76-4a57-9b70-789f95bf93ad_1024x1024.jpg?v=1755196015\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/b8f20973-5d5c-4493-975a-e06d05b020df_1024x1024.jpg?v=1755196039\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe Askar 91F strikes a balance between practicality and versatility while achieving lightweight portability through its compact design.The OTA weighs just 3.92kg, with a gross weight of 4.52kg (including the tube rings and dovetail plate).  \u003c\/p\u003e\n\u003cp\u003eThe Askar 91F is versatile in its use, allowing for both visual observation and astrophotography.     For user convenience, it comes standard with three visual accessories: an 8mm eyepiece, a 20mm eyepiece, and a 1.25-inch erecting prism.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3abcc63f-9690-4a70-ae61-dcdaec24c590_1024x1024.jpg?v=1755196100\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eThe 8mm eyepiece has a magnification of 76x and the 20mm eyepiece has a magnification of 30x.The Askar 91F can be used with different eyepieces depending on the target, and both eyepieces are ideal for viewing birds and landscapes.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/d60045b0-2ff2-4e43-9fbe-8740e10fd73e_1024x1024.jpg?v=1755196146\"\u003e\u003c\/div\u003e\n\u003cp\u003eBoth eyepieces are 1.25 inches and have a soft rubberized top for comfortable use.  \u003c\/p\u003e\n\u003cp\u003eThe 1.25-inch erecting prism provides correct left-to-right and down-to-up image views, making users easy for you to conduct terrestrial and astronomical observations without the hassle of seeing images reversed up, down, left, and right.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/b036cb1a-693f-4a79-88ad-0ec7247137c2_1024x1024.jpg?v=1755196245\"\u003e\u003c\/div\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eThe Askar 91F also comes standard with a photographic extension tube with a built-in 2-inch filter thread for easy shooting connections, providing M48×0.75 \u0026amp; M54×0.75 adapters to accommodate various DSLR cameras and professional astronomical cameras, meeting diverse imaging needs.  \u003c\/p\u003e\n\u003cp\u003eThe mechanical design of the Askar 91F itself adheres to Askar's consistent philosophy of taking into account the user's habits and minimizing the user's invisible costs.\u003c\/p\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eThe Askar 91F features a retractable dew shield, further reducing overall length and enhancing portability.The inside of the tube is pasted with matting felt to better eliminate stray light, while the exterior sports a sleek blue-and-white color scheme with high-quality CNC machining and paint finish.\u003c\/p\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eThe Askar 91F’s handle is 130mm long and has a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/p\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eIn terms of the focuser, the Askar 91F is equipped with a dual-speed R\u0026amp;P 3-inch rigid focuser, which has a 1:10 fine adjustment and a 360° scaled rotator at the rear end for precise angle adjustment.The 230mm Vixen-style dovetail plate includes 1\/4\" and 3\/8\" screw holes for direct tripod mounting.  \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/45be5f3f-49d0-47af-9dd9-e3be0d6c9057_1024x1024.jpg?v=1755196372\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe rear interface of the Askar 91F includes both 2-inch and 1.25-inch adapters, enabling compatibility with a wide range of astronomical accessories.  \u003c\/p\u003e\n\u003cp\u003eWhether for deep-sky astrophotography, planetary observation, or birdwatching and travel, the 91F is your ideal companion for exploring the world.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4e1e8fa8-f15f-4591-a1ca-c2906621e6a5_1024x1024.jpg?v=1755196411\"\u003e\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications \u003c\/h3\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eAperture size\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e91mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocal length\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e609mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocal ratio\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003ef\/6.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eObjective lens\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eImage circle\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eImaging mode:   \u003cbr\u003e75mm (from the base of M48×0.75 male thread）   \u003cbr\u003e93mm（from the base of M54×0.75 male thread)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eObserving mode:   \u003cbr\u003e112mm（from the end of 1.25\" eyepiece holder）   \u003cbr\u003e122mm（from the end of 2\" eyepiece holder）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eTotal length\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e513mm(including 1.25\" adapter as dew shield contracted）   \u003cbr\u003e599mm(including 1.25\" adapter as dew shield fully stretched）   \u003cbr\u003e550mm(including the photographic adapter as dew shield contracted）   \u003cbr\u003e636mm(including the photographic adapter as dew shield fully stretched）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eNet weight\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e3.92kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e4.52kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eRear-end thread type\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003eM64×1-M54×0.75    \u003cbr\u003eM54×0.75-M54×0.75    \u003cbr\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eStandard package items\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"text-align: center;\"\u003e A 91F OTA，a pair of tube rings, a handle, a 230mm Vixen dovetail plate,a set of photographic adapters, a 1.25-inch erecting prism, an 8mm eyepiece, a 20mm eyepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eProduct Size Diagram\u003c\/h2\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1eb9821b-8afc-4233-854d-913f60c86dbc_1024x1024.jpg?v=1755196473\"\u003e\u003c\/div\u003e\n\u003ch2\u003eConnection Diagram\u003c\/h2\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1f5f8ab1-9559-4f86-bb0a-41ab7be8b2e4_1024x1024.jpg?v=1755196582\"\u003e\u003c\/div\u003e\n\u003ch2\u003eEAF Connection\u003c\/h2\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0f1194fe-eec8-4f05-aea9-3818c7c3b146_1024x1024.jpg?v=1755196634\"\u003e\u003c\/div\u003e\n\u003ch2\u003eOptical Path\u003c\/h2\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/eab23c07-a3ca-4aed-86c7-28b449215324_1024x1024.jpg?v=1755196700\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eSpot Diagram\u003c\/h2\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2cff05db-8e5d-439a-b4f4-17a780185ae3_1024x1024.jpg?v=1755196728\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3 style=\"text-align: start;\"\u003eIn the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: start;\"\u003e91F OTA\u003c\/li\u003e\n\u003cli style=\"text-align: start;\"\u003ePhotographic adapters\u003c\/li\u003e\n\u003cli style=\"text-align: start;\"\u003e1.25'' 45* erecting prism\u003c\/li\u003e\n\u003cli style=\"text-align: start;\"\u003e8mm eyepiece\u003c\/li\u003e\n\u003cli style=\"text-align: start;\"\u003e20mm eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAskar Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_91F_User_Manual_EN.pdf?v=1755197185\" target=\"_blank\"\u003e91F Flat-Field User's Manual\u003c\/a\u003e\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47550539399397,"sku":"ASK-91F","price":1399.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar91f-1.png?v=1777045198"},{"product_id":"askar-60f-flat-field-refractor-60f","title":"Askar 60F Flat-Field Refractor (60F)","description":"\u003ch1\u003eAskar 60F Flat-Field Refractor (60F)\u003c\/h1\u003e\n\u003cp\u003eSelf-flattened quadruplet Astrograph which can be used for visual observing and astrophotography. \u003c\/p\u003e\n\u003cp\u003eThe Askar 60F is an OTA with an aperture of 60 mm, a focal length of 408mm, and a native focal ratio of F6.8, designed for astronomy enthusiasts who prioritize portability and high image quality.\u003c\/p\u003e\n\u003cp\u003eThe Askar 60F features a quadruplet optical lens design (three front elements and one rear element), including one piece of ED glass， which can effectively reduce chromatic aberration. The Askar 60F supports 44mm full-frame imaging with great performance of the surrounding star points. \u003c\/p\u003e\n\u003cp\u003eWith its built-in field flattener, the Askar 60F eliminates the need for an additional flattener and complex back-focus calculations. Simply attach your camera, achieve focus, and you’re ready to capture images, making astrophotography simpler and more enjoyable.\u003c\/p\u003e\n\u003cp\u003eThe Askar 60F OTA weighs only 2.5kg, and the gross weight is 3kg (including the tube rings and dovetail plate). It is compact and lightweight, making it easy to carry for observing or astrophotography—wherever your exploration takes you.\u003c\/p\u003e\n\u003cp\u003eThe Askar 60F is designed for both visual observation and photography. It comes with a photographic extension tube featuring a built-in 2\" filter thread and has M48×0.75 and M54×0.75 adapters, making it compatible with DSLRs and astronomical cameras for quick connection and instant shooting. \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe mechanical design of the Askar 60F minimizes hidden usage costs and ensures a smooth experience.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Askar 60F features a retractable dew shield, further reducing overall length and enhancing portability. The inside of the tube is pasted with matting felt to eliminate stray light better, while the exterior sports a sleek blue-and-white color scheme with high-quality CNC machining and paint finish.\u003c\/p\u003e\n\u003cp\u003eOn the handle bar of Askar 60F, it has a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/p\u003e\n\u003cp\u003eIn terms of the focuser, the Askar 60F is equipped with a dual-speed R\u0026amp;P 2.4-inch rigid focuser, offering 1:10 fine-tuning. The fine adjustment knob has an anti-slip cover, and the rear features a 360° scale rotator for precise angle adjustment.  \u003c\/p\u003e\n\u003cp\u003eThe dovetail plate is a 230mm standard Vixen-style plate, with 1\/4\" and 3\/8\" screw holes, allowing direct connection to a tripod.\u003c\/p\u003e\n\u003cp\u003eOffering professional-grade performance at an entry-level price, the Askar 60F is your ideal companion for exploring the cosmos and capturing nature’s beauty. Travel light, discover more—start your journey with Askar 60F!\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications \u003c\/h3\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" style=\"text-align: center;\" colspan=\"3\"\u003eParameters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eAperture size\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocal length\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e408mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocal ratio\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003ef\/6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eObjective lens\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eImage circle\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eImaging mode:\u003cbr\u003e81mm (from the base of M48×0.75 male thread）\u003cbr\u003e99mm（from the base of M54×0.75 male thread)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eObserving mode:\u003cbr\u003e120mm（from the end of 1.25\" eyepiece holder）\u003cbr\u003e130mm（from the end of 2\" eyepiece holder）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eTotal length\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e289mm(including 1.25\" adapter as dew shield contracted）\u003cbr\u003e323mm(including 1.25\" adapter as dew shield fully stretched）\u003cbr\u003e336mm(including the photographic adapter as dew shield contracted）\u003cbr\u003e369mm(including the photographic adapter as dew shield fully stretched）\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocuser travel length\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e5cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eNet weight\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e2.36kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e2.86kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eRear-end thread type\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003eM64×0.75-M54×0.75\u003cbr\u003eM54×0.75-M54×0.75\u003cbr\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eStandard package items\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\"\u003e A 60F OTA，a pair of tube rings, a handle, a mm Vixen dovetail plate,a set of photographic adapters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 style=\"text-align: start;\"\u003eIn the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"text-align: start;\"\u003e60F OTA\u003c\/li\u003e\n\u003cli style=\"text-align: start;\"\u003ePhotographic adapters\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAskar Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar_91F_User_Manual_EN.pdf?v=1755197185\" target=\"_blank\"\u003e Flat-Field User's Manual\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47571833225445,"sku":"ASK-60F","price":699.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_c01443bc-bcd0-4ebb-a0f4-9e78a599061c.png?v=1777045200"},{"product_id":"askar-60f-0-75x-reducer","title":"Askar 60F 0.75x Reducer (60F0.75)","description":"\u003ch1\u003eAskar 60F 0.75x Reducer\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 60F 0.75x reducer, specifically optimized for the Askar 60F, is designed to enhance your astrophotography experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_c777d702-a575-480e-a92d-3552585a4d5c.webp?v=1764098353\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eDesigned exclusively for the Askar 60F, this 0.75x reducer reduces the 60F focal ratio to F5.1, offering a faster focal ratio while incorporating field-flattening correction capabilities. The faster focal ratio provides a wider field of view and shorter exposure times, making it particularly suitable for capturing large nebulae, dense star clusters, as well as faint or fast-moving celestial objects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \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 M50×1 threads on both ends for easy system integration. The included 60F photographic extension tube offers both M54×0.75 and M48×0.75 adapter specifications, allowing direct connection to the reducer for convenient setup. The reducer's adapter features a built-in M48×0.75 thread for direct attachment of 2-inch filters, eliminating the need for additional adapters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eConstructed using CNC machining, the reducer boasts a great finish and comes with front and rear metal thread caps for dust protection during storage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"reset_style\"\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e(After attaching) 60F Focal length\u003c\/td\u003e\n\u003ctd\u003e311 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e(After attaching) 60F Focal ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Number\u003c\/td\u003e\n\u003ctd\u003eTriplet design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55 mm (from the base of M48 male thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-end thread type\u003c\/td\u003e\n\u003ctd\u003eM50×1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T1_795fd900-b486-4a66-9505-2f2cc34b27e8.webp?v=1764098536\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T2_4ef6c195-0d10-4218-8e10-8cccdad0a47f.webp?v=1764098546\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T3_0906c626-8b4c-4420-8100-2121f466d267.webp?v=1764098560\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T4_50502ffc-5493-43d7-802a-4c34c63df11a.webp?v=1764099529\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003e60F 0.75x Reducer\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/askar-sharpstar-warranty\" rel=\"noopener\" target=\"_blank\"\u003eAskar's Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48085068349669,"sku":"ASK-60F0.75","price":279.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S1_938965bf-4b85-4548-8aae-844441dfe1bd.webp?v=1778265176"},{"product_id":"askar-60f-0-75x-reducer-60f0-75-copy","title":"Askar 91F 0.75x Reducer (91F0.75)","description":"\u003ch1\u003eAskar 91F 0.75x Reducer\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 0.75x Reducer for the 91F is specially optimized to unlock greater astrophotography capabilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_63f12284-4ecc-4118-a36f-1319f2f8afc9.webp?v=1764100163\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 0.75x reducer can bring Askar 91F's focal ratio down to F5, providing not only a faster focal ratio but also built-in field-flattening correction. The shorter focal ratio delivers a wider field of view and a faster exposure time, making it ideal for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 91F 0.75x reducer adopts a triplet design and supports a 44mm full-frame image circle.  The back focus from the M48 thread is a standard 55mm. Both end threads are M59*1. The 91F photographic extension tube includes M54×0.75 and M48×0.75 adapters for direct and convenient connection to the 0.75x reducer. The reducer features a built-in M48*0.75 2-inch filter thread, allowing for direct filter installation and use. The entire reducer is CNC-machined and comes with front and rear metal threaded caps to protect against dust when not in use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e（After attaching）91F Focal length\u003c\/td\u003e\n\u003ctd\u003e455 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e（After attaching）91F Focal ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Number\u003c\/td\u003e\n\u003ctd\u003eTriplet design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55 mm (from the base of M48 male thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear-end thread type\u003c\/td\u003e\n\u003ctd\u003eM59*1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T1_781c26b2-dbc5-4c90-a674-43a107389135.webp?v=1764100316\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T2_a0a567a6-389f-42a8-8706-927ca64c997e.webp?v=1764100331\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T3_2e2f4f15-ee2c-45d2-b503-09a2966fc07f.webp?v=1764100349\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/T4_a810cea3-1936-4eef-bafe-a0a0cd43be14.webp?v=1764100361\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003e91F 0.75x Reducer\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/askar-sharpstar-warranty\" rel=\"noopener\" target=\"_blank\"\u003eAskar's Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48085115961573,"sku":"ASK-91F0.75","price":279.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S1_938965bf-4b85-4548-8aae-844441dfe1bd.webp?v=1778265176"},{"product_id":"askar-111f-flat-field-refractor-111f","title":"Askar 111F APO Flat-Field ED Quadruplet (111F)","description":"\u003ch1\u003eAskar 111F APO Flat-Field ED Quadruplet\u003c\/h1\u003e\n\u003cp class=\"e_text-102 s_title\"\u003eSelf-flattened quadruplet astrograph which can be used for visual observing and astrophotography. \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2c17fde7-40d3-471c-8da2-10d998ecbeec_1024x1024.webp?v=1778250918\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/www.istronomyplus.com_4_1024x1024.png?v=1778252148\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe Askar 111F has 111mm aperture, 766mm focal length, and a native focal ratio of 6.9, suitable for various uses including astrophotography and daily photography.\u003c\/p\u003e\n\u003cp\u003eThe Askar 111F adopts a quadruplet lens design (three elements in the front, one in the rear), which includes an ED glass to effectively reduce chromatic aberration. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/videoframe_7058.png?v=1778252179\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/videoframe_4180_1024x1024.png?v=1778252518\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/60510b62-d602-4337-8ba9-268761adeaaa_1024x1024.jpg?v=1778252618\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eThe main tube features a built-in baffle that further blocks stray light and enhances image quality. The Askar 111F supports full-frame imaging, delivering delicate and sharp stars across the frame.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/118e613b-ba9c-4f42-9030-97698e47b7e4_1024x1024.jpg?v=1778252651\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eFeaturing a self-flattened design, users can shoot directly after connecting imaging accessories and achieving focus. This eliminates the need for purchasing additional flatteners or calculating back focus, offering simple operation and a smooth experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a_da520377-fcb4-4416-8356-95c7b02873cc_1024x1024.jpg?v=1778252703\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\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\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/videoframe_1467_1024x1024.png?v=1778252967\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\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\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/b4351ed0-476c-4729-a1e6-04bd4a0a9897_1024x1024.jpg?v=1778253023\"\u003e\u003c\/div\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/594bd0e3-4d7e-4230-88c5-05f45b461123_1024x1024.jpg?v=1778253070\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe Askar 111F, a multi-purpose self-flattened astrograph, starts your versatile deep-sky exploration journey with exceptional cost-effectiveness.\u003c\/p\u003e\n\u003ch3\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4151fb7a-2f81-4a82-a1e8-0580db282b03_1024x1024.jpg?v=1778253133\"\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ccolgroup\u003e \u003ccol\u003e \u003ccol\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\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\u003c\/figure\u003e\n\u003ch4\u003eProduct Size Diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/454295a5-664d-43a2-9b8e-1b65a715a593.webp?v=1778253554\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/39e3d53e-59fa-4ba9-bb6a-d46e147a0f0b.webp?v=1778253647\"\u003e\u003c\/h3\u003e\n\u003ch4 style=\"text-align: start;\"\u003eConnection Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/d77cda7c-afa8-4052-9c88-e7ad4d7a8ac1_cfcb9cc5-f0a2-40a2-8840-c8e3595c8454_1024x1024.webp?v=1778253988\"\u003e\u003c\/div\u003e\n\u003ch4\u003eSpot Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/d3529dd7-ba1a-4553-af4b-787d4e747dc3_1024x1024.webp?v=1778254023\"\u003e\u003c\/div\u003e\n\u003ch4\u003eOptical Path Diagram\u003c\/h4\u003e\n\u003ch3\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/d7da6964-5f63-4a1b-add1-645d41eba620.webp?v=1778254058\"\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAskar 111F\u003c\/li\u003e\n\u003cli\u003eM78-M54 \/ M54-M48 Photographic adapters\u003c\/li\u003e\n\u003cli\u003eInspection Check list\u003c\/li\u003e\n\u003cli\u003eUser's manual\u003c\/li\u003e\n\u003cli\u003eCertificate Card\u003c\/li\u003e\n\u003cli\u003eProduct Warranty\u003c\/li\u003e\n\u003cli\u003eShipping box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/askar-sharpstar-warranty\" target=\"_blank\"\u003eAskar Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48993641627877,"sku":"ASK-111F","price":2099.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Askar111A.webp?v=1778254490"},{"product_id":"askar-131f-apo-quadruplet","title":"Askar 131F APO Flat-Field ED Quadruplet (131F)","description":"\u003ch1\u003eAskar 131F APO Flat-Field ED Quadruplet\u003c\/h1\u003e\n\u003cp\u003eSelf-flattened quadruplet Astrograph which can be used for visual observing and astrophotography. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3d13b4c3-a038-41cf-a53a-6cd4aeb1dde7.jpg?v=1778254870\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/131F_EN_1024x1024.png?v=1781801293\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe Askar 131F is a large-aperture telescope designed for astronomy enthusiasts, featuring a 131mm aperture, 983mm focal length, and a native F7.5 focal ratio.\u003c\/p\u003e\n\u003cp\u003eIt employs a quadruplet optical lens design with three elements in the front and one in the rear, including one piece of  ED glass to effectively suppress chromatic aberration. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/videoframe_2887.png?v=1778255002\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4f99667b-b292-47ac-ae31-c1634d00cf1b_1024x1024.jpg?v=1778255041\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe lens tube incorporates an internal baffle to block stray light, further enhancing image quality. The Askar 131F supports full-frame imaging and delivers excellent star performance across the frame.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/8123866b-9cf3-4a57-ab98-ae6313f8a599_1024x1024.jpg?v=1778255070\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003eContinuing the F series' self-flattening design, users can achieve optimal imaging without purchasing an additional flattener or calculating back focus. Simply connect the imaging accessory, achieve focus, and you're ready to shoot—streamlining the process and lowering the barrier to use.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a_da520377-fcb4-4416-8356-95c7b02873cc_1024x1024.jpg?v=1778252703\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe telescope comes standard with a photographic extension tube featuring a built-in 2-inch filter thread and offers M48×0.75 and M54×0.75 adapters for broad compatibility with DSLR cameras and dedicated astronomy cameras, meeting diverse imaging needs.\u003c\/p\u003e\n\u003cp\u003eStaying true to the brand philosophy, the Askar 131F balances optical performance with user experience. The lens tube is crafted with high-quality CNC machining and painted finish, continuing the F series' iconic blue-and-white color scheme for strong visual identity.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ab64cbe1-53aa-400b-abc3-3efff7643f05_1024x1024.webp?v=1778255178\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/48a2d43f-cf6d-4c50-a39d-6b7bc5d8f6bd_1024x1024.jpg?v=1778255204\"\u003e\u003c\/div\u003e\n\u003cp\u003eWhether for deep-sky imaging or visual observation, the Askar 131F is an ideal choice for advancing your astrophotography journey.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a91f8254-3b9e-4238-9ea1-896d6d9d6362_1024x1024.jpg?v=1778255237\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" class=\"responsive-title\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\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\u003c\/figure\u003e\n\u003ch4\u003eProduct Size Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/8a883eef-96d8-4147-a206-fe1420dd4855_1024x1024.webp?v=1778255442\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a9e9b79d-844c-4873-9502-9cc87b6f3bf8_1024x1024.webp?v=1778255520\"\u003e\u003c\/div\u003e\n\u003ch4\u003eConnection Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/dbaae082-9703-4ccc-a319-b6dedcb3e3d8_1024x1024.webp?v=1778255735\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch4\u003eOptical Path Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/e9cb86dc-bee7-488c-89ef-47160eaf5769_1024x1024.webp?v=1778255781\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch4\u003eSpot Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/96389167-369e-4ff4-bbd2-43768e5ac17d_1024x1024.webp?v=1778255802\"\u003e\u003c\/div\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAskar 131F\u003c\/li\u003e\n\u003cli\u003eM78-M54 \/ M54-M48 Photographic adapters\u003c\/li\u003e\n\u003cli\u003eInspection Check list\u003c\/li\u003e\n\u003cli\u003eUser's manual\u003c\/li\u003e\n\u003cli\u003eCertificate Card\u003c\/li\u003e\n\u003cli\u003eProduct Warranty\u003c\/li\u003e\n\u003cli\u003eShipping box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/askar-sharpstar-warranty\" target=\"_blank\"\u003eAskar Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48993843282149,"sku":"ASK-131F","price":2799.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_01227b21-e371-4149-bbf9-7d935d3539e2.webp?v=1778256145"},{"product_id":"askar-0-74-reducer-for-111f-refractor-askar111fr","title":"Askar 0.74× Reducer for 111F Refractor (111FR)","description":"\u003ch1\u003eAskar 0.74× Reducer for 111F Refractor\u003c\/h1\u003e\n\u003cp class=\"e_text-102 s_title response-transition\"\u003eThe Askar 0.74× reducer, specially optimized for the Askar 111F, is designed to unlock a broader and more efficient deep-sky astrophotography experience.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/5d315ef5-b633-45ba-bf08-81d946c19cc7_1024x1024.jpg?v=1778257968\"\u003e\u003c\/div\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eOptical Path Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1a8e1b6b-8c51-4525-b753-3ee73722e62e_1024x1024.webp?v=1778258192\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eSpot Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/f8145de5-dc89-42bc-a332-f4b7deacfff7_1024x1024.webp?v=1778258250\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"e_text-102 s_title response-transition\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e （After attaching）60F 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）60F 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\u003cp class=\"e_text-102 s_title response-transition\"\u003e \u003c\/p\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eSize Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0e1cb978-f3d5-4c9a-8429-9f624c17f5a1_1024x1024.webp?v=1778258130\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eInstallation\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2867ac9a-f6ea-40c3-bc6f-8722e38d4e4f_1024x1024.webp?v=1778258164\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3 class=\"e_text-102 s_title response-transition\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"e_text-102 s_title response-transition\"\u003eAskar 0.74× Reducer for 111F Refractor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/askar-sharpstar-warranty\" target=\"_blank\"\u003eAskar Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48994012954853,"sku":"ASK-111FR","price":419.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_6cee65b5-f3d9-49c5-b3c5-bf5748d7616a.png?v=1778258961"},{"product_id":"askar-0-74-reducer-for-131f-refractor-131fr","title":"Askar 0.74× Reducer for 131F Refractor (131FR)","description":"\u003ch1 class=\"e_text-102 s_title response-transition\"\u003eAskar 0.74× Reducer for 131F Refractor (131FR)\u003c\/h1\u003e\n\u003cp class=\"e_text-102 s_title response-transition\"\u003eDesigned exclusively for the Askar 131F, this 0.74× reducer reduces the 131F focal ratio to F5.6, unlocking more potential for your imaging possibilities.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9ac72586-fb96-41b0-ae16-dcb0ffc2f617_1024x1024.jpg?v=1778259736\"\u003e\u003c\/div\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eOptical Path Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/7e3a109f-9f5f-4b08-b223-f4823567ab21_1024x1024.webp?v=1778259862\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eSpot Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/7b275b64-0102-442f-87cf-fa1816ab032f_1024x1024.webp?v=1778259893\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"e_text-102 s_title response-transition\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e （After attaching）60F 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）60F 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\u003cp class=\"e_text-102 s_title response-transition\"\u003e \u003c\/p\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eSize Diagram\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/b8ba6641-f768-4a50-a30e-137d3bb2aaf4_1024x1024.webp?v=1778259988\"\u003e\u003c\/div\u003e\n\u003ch4 class=\"e_text-102 s_title response-transition\"\u003eInstallation\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/f2814497-8813-43b5-9b6a-71f9c3ab355b_1024x1024.webp?v=1778260051\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"e_text-102 s_title response-transition\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli class=\"e_text-102 s_title response-transition\"\u003eAskar 0.74× Reducer for 131F Refractor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/askar-sharpstar-warranty\" target=\"_blank\"\u003eAskar Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48994155921637,"sku":"ASK-131FR","price":419.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/B_92390b12-b127-4917-b8f3-653fef5a8087.webp?v=1778260307"}],"url":"https:\/\/istronomyplus.com\/collections\/askar-f-series.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}