{"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.astronomyplus.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:\/\/astronomyplus.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","url":"https:\/\/astronomyplus.com\/products\/askar-111f-flat-field-refractor-111f","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}