{"product_id":"askar-sqa70-f-4-8-quintuplet-apo-sqa70","title":"Askar SQA70 f\/4.8 Quintuplet APO (SQA70)","description":"\u003ch1\u003eAskar SQA70  f\/4.8 Quintuplet APO\u003c\/h1\u003e\n\u003cp\u003eSuper Quintuplet Astrograph.  High-quality quintuplet air-spaced ED glass Petzval Astrograph.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/499a9aff-2279-44a2-b9b7-17d623d429f4.webp?v=1740856528\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2 data-end=\"250\" data-start=\"39\"\u003eEXCELLENT STAR PERFORMANCE\u003c\/h2\u003e\n\u003cp data-end=\"250\" data-start=\"39\"\u003eThe central star point has an RMS radius of less than 1.84 μm, and the star point at the corner is less than 2.4 μm. It also has excellent full-field illumination and MTF data.\u003c\/p\u003e\n\u003ch2 data-end=\"556\" data-start=\"252\"\u003ePETZVAL STRUCTURE\u003c\/h2\u003e\n\u003cp data-is-last-node=\"\" data-is-only-node=\"\" data-end=\"556\" data-start=\"252\"\u003eIntegrated self-flattened design, supporting a 44mm full-frame image circle, no need for additional flatteners, and no need for additional calculation of the back focus. Between 37mm and 68mm connection distance, users can directly use it for shooting after the OTA is in focus.\u003c\/p\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_5a56ea17-e106-4e19-aa31-c0d996f0960d.jpg?v=1740857068\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSTABLE LENS STRUCTURE DESIGN\u003c\/h2\u003e\n\u003cp\u003e70mm aperture, 336mm focal length, the native focal ratio is F4.8. Quintuplet air-spaced lens design, including 2 pieces of ED glass. The optical system of the SQA70 has been fully optimized, utilizing a special glass combination design paired with ED glass to achieve optimal results.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3_18f486fb-d44b-469d-a0a8-ec7962e3591a.webp?v=1740857854\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"39\" data-end=\"620\"\u003eINTEGRATED TUBE RING\u003c\/h2\u003e\n\u003cp data-start=\"39\" data-end=\"620\"\u003eIntegrated pair of tube ring sets, with a hollow design in the middle to reduce overall weight. Enlarged hand screws allow users to open and close the tube ring without additional tools. There are 4 M4 and M6 threaded holes on both sides of the tube ring, which are convenient for installing the base or dovetail plate and connecting different accessories. You can even set up another set of OTA for shooting.\u003cbr data-start=\"475\" data-end=\"478\"\u003eThe handle on the top of the tube ring is slotted with a multifunctional finder base, which can be used to install astronomical accessories.\u003c\/p\u003e\n\u003ch2 data-start=\"622\" data-end=\"882\"\u003eFINDER BASES\u003c\/h2\u003e\n\u003cp data-start=\"622\" data-end=\"882\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eOn both sides of the focuser, there are two finder bases, which not only eliminate the need for disassembling when changing the position of the finder scope but also provide additional mounting positions for other astronomical accessories.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eRETRACTABLE DEW SHIELD\u003c\/h2\u003e\n\u003cp\u003eThe Dew shield is a retractable design that can be pulled out when used. It protects the lens from the impact of external and internal light and protects the lens itself.\u003c\/p\u003e\n\u003ch2\u003eDUAL-SPEED FOCUSER\u003c\/h2\u003e\n\u003cp\u003eThe dual-speed rack-and-pinion 2.5-inch focuser is compatible with most motorized focusers on the market. The focusing travel is 32 mm, and the focuser tube is engraved with high-precision scales. The entire focuser barrel is CNC machined with an anti-reflective internal design and matting paint, providing extra measures to eliminate stray light.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_df35a64f-2f9f-4337-8158-b183e1d3cdbc.webp?v=1740859592\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003e360° ROTATOR\u003c\/h2\u003e\n\u003cp\u003e\u003cbr data-end=\"58\" data-start=\"55\"\u003eThe rear of the focuser is equipped with a 360° high-precision rotator with a precision scale to allow the user to adjust and save the angle of rotation. It is also equipped with an edge-shaped locking screw for easy locking.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/55.webp?v=1740859953\" alt=\"\" width=\"797\" height=\"270\"\u003e\u003c\/p\u003e\n\u003ch2\u003eREAR-END ADAPTERS\u003c\/h2\u003e\n\u003cp\u003eThe end of the SQA70 is equipped with a variety of adapters, all of which are toothed and ribbed, making it easy to rotate manually without slipping. The adapters are available in sizes M54, M48, and M42 and can be used to attach various accessories, such as cooled cameras.\u003c\/p\u003e\n\u003ch2\u003eHIGH-QUALITY MACHINING\u003c\/h2\u003e\n\u003cp\u003eThe entire SQA70 tube is crafted using high-quality CNC machining with anodized and surface spray paint treatments. The top of the handle and the focuser are all designed with exclusive nameplates, demonstrating high-end quality.\u003c\/p\u003e\n\u003ch2\u003eOPTICAL PATH\u003c\/h2\u003e\n\u003cp\u003eThe SQA70 is a quituplet air-spaced lens design, including 2 piece of ED glass.\u003c\/p\u003e\n\u003ch2\u003eSPOT DIAGRAM\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_87d944e2-1ba9-4ed9-a19c-5835efedb0c9.webp?v=1740860379\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\" width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e70mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e336mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003ef\/4.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eQuintuplet petzval APO（including two pieces of ED glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e332mm(when the dew shield is contracted)\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e372mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003efull frame（44mm）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e2.68kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e3.5kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eM42\/M48(with M48×0.75 filter thread)\/M54 adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSupport 37-68mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003ea SQA70 OTA, an Oxford cloth case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cdiv id=\"tab-3\" class=\"tab__content tab.box tab__content--active\" role=\"tabpanel\" data-content=\"tab-3\" aria-labelledby=\"tab-title-3\" aria-hidden=\"false\"\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eSQA70 OTA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eOxford Cloth Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eSharpStar Warranty\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":46558565007589,"sku":"ASK-SQA70","price":2233.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_24583da7-e586-47e9-9715-c7c8348b1a2f.webp?v=1777045180","url":"https:\/\/istronomyplus.com\/products\/askar-sqa70-f-4-8-quintuplet-apo-sqa70","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}