{"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","url":"https:\/\/istronomyplus.com\/products\/askar-60f-flat-field-refractor-60f","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}