{"product_id":"askar-sqa106-f-4-8-quintuplet-apo-sqa106","title":"Askar SQA106 f\/4.8 Quintuplet APO (SQA106)","description":"\u003ch1\u003eAskar SQA106 f\/4.8 Quintuplet APO\u003c\/h1\u003e\n\u003cdiv class=\"e_container-3 s_layout response-transition\"\u003e\n\u003cdiv class=\"cbox-3-1 p_item\"\u003e\n\u003ch2 class=\"e_text-8 s_title\"\u003eSuper fine 106mm aperture quintuplet air-spaced SD glass Petzval Astrograph\u003c\/h2\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-3-1 p_item\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_5eb4ce37-b9c2-43c9-9335-bd284eac5286.webp?v=1730926992\"\u003e\u003c\/div\u003e\n\u003ch2 class=\"cbox-3-1 p_item\"\u003e\n\u003cbr\u003eExcellent Star Performance \u003c\/h2\u003e\n\u003cdiv class=\"cbox-3-1 p_item\"\u003e\n\u003cbr\u003eQuintuplet air-spaced lens design, including 2 pieces of SD glass. The SQA106 supports a 55mm image circle. The central star point has an RMS radius of less than 1.7 um, and the star point at 55 mm is less than 2.2 μm, showing a super-fine star point. It also has excellent full-field illumi- nation and MTF data. The relative illumination can be higher than 90% at 44 mm image circle.\u003c\/div\u003e\n\u003ch2 class=\"cbox-3-1 p_item\"\u003e\n\u003cbr\u003ePetzval Structure\u003c\/h2\u003e\n\u003cdiv class=\"cbox-3-1 p_item\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"cbox-3-1 p_item\"\u003eIntegrated self-flattened design, no need for additional flatteners, and no need for additional calculation of the back focus. Between 48mm and 78mm connection dis- tance, users can directly use it for shooting after the OTA is in focus.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"e_container-11 s_layout response-transition\"\u003e\n\u003cdiv class=\"cbox-11-0 p_item\"\u003e\n\u003cdiv class=\"e_container-52 s_layout response-transition\"\u003e\n\u003cdiv class=\"cbox-52-0 p_item\"\u003e\n\u003cdiv class=\"e_loop-35 s_list response-transition\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003cdiv class=\"p_list\"\u003e\n\u003cdiv class=\"cbox-35 p_loopitem\"\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_3d9a75cd-1905-4f1e-abd7-9eb77306dda8.webp?v=1730927688\" width=\"1002\" height=\"659\"\u003e\u003c\/p\u003e\n\u003ch2 class=\"e_text-36 s_title response-transition\"\u003eRetractable Dew Shield\u003c\/h2\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003eThe dew shield is a retractable design that can be pulled out. It protects the lens from the impact of external and internal light and protects the lens itself. \u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a5ec3c3c-0291-4d96-95c6-f2d830282128.gif?v=1730927912\" width=\"999\" height=\"260\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eINTEGRATED TUBE RING\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEnlarged hand screws allow users to open and close the tube ring without additional tools.\u003c\/li\u003e\n\u003cli\u003eIntegrated pair of tube ring sets, with a hollow design in the middle to reduce overall weight.\u003c\/li\u003e\n\u003cli\u003eThere are 6 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.\u003c\/li\u003e\n\u003cli\u003e The handle on the top of the tube ring is slotted with a multifunctional finder base, which can be used to install astronomical accessories.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"e_text-36 s_title response-transition\"\u003eFinder Bases\u003c\/h2\u003e\n\u003cp\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 class=\"e_text-36 s_title response-transition\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_c4971c91-f02c-4c71-a150-dae8cd140645.webp?v=1730928676\"\u003e\u003c\/p\u003e\n\u003ch2 class=\"e_text-36 s_title response-transition\"\u003eDovetail Plate\u003c\/h2\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003eThe standard Losmandy-style 300mm dovetail plate is easy to dismantle and install. \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_9321c3c0-84a2-49ba-a078-19e2249faaec.webp?v=1730928805\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003eLarge, Rigid Dual-Speed Focuser\u003c\/h2\u003e\n\u003cp\u003eDual-speed rack-and-pinion large 2.8-inch rigid focuser, which can be compatible with most motorized focusers on the market. The focusing travel is 30 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 height=\"680\" width=\"1075\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/c5a09177-5d99-4309-a6fd-8086e41b6ff8.webp?v=1730929472\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003eRear-End Adapters\u003c\/h2\u003e\n\u003cp\u003eThe end of the SQA106 is equipped with various adapters, all of which are toothed and ribbed, making it easy to rotate manually without slip- ping. The adapters are available in sizes M68, M54, and M48 and can be used to attach various accessories, such as full-frame cameras.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003e360° Enlarged Rotator \u003c\/h2\u003e\n\u003cp\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 ro- tation. It is also equipped with an enlarged lock- ing screw for easy locking even under high loads.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003eHigh-Quality Machining\u003c\/h2\u003e\n\u003cp\u003eThe entire SQA106 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 ex- clusive nameplates, demonstrating high-end\u003cbr\u003equality.\u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_daaf0868-6bbf-40a6-8778-26c1f1fb2bd0.webp?v=1730929813\" width=\"1070\" height=\"704\"\u003e\u003c\/p\u003e\n\u003ch2 class=\"e_text-36 s_title response-transition\"\u003e\n\u003cimg\u003eMTF Chart\u003c\/h2\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cbr\u003eThe modulation transfer function (MTF) is a quantitative description of the clarity of the image (including resolution and contrast) of an optical lens. The vertical axis is the MTF value, and the horizontal axis is the distance from the center of the frame to the edge. In the two sets of curves corresponding to low and high frequencies, even at the edge of 55mm image circle. the sagittal lines and sagittal lines distance of the SQA106 lens remain very small, and at the low frequency of 10LP\/mm, it is higher than 0.9 overall, showing the high resolution and sharpness of the SQA106.\u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_f9248d09-76f6-48ca-95ef-517a3a423f58.webp?v=1730929960\"\u003e\u003c\/p\u003e\n\u003ch2 class=\"e_text-36 s_title response-transition\"\u003eSpot Diagram\u003c\/h2\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003eThe imaging quality of the optical system can be evaluated by analyzing\u003cbr\u003ethe distribution of the spots on the spot diagram.\u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003eThe SQA106 has a central star point with an RMS radius of less than 1.65 μm, and the star point at the corner is less than 2.2μm, showing fine star point.\u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_87c31221-bd66-4626-8724-c79055c7ec70.webp?v=1730930292\"\u003e\u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_a81ba800-4bed-445f-9c01-6bfb41404da3.webp?v=1730930390\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3 class=\"e_text-36 s_title response-transition\"\u003eTechnical Speciications\u003c\/h3\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e106mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e509mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\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\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuintuplet petzval APO（including two pieces of SD glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e516mm(when the dew shield is contracted)\u003cbr\u003e586mm(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\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003efull frame（44mm），upgrade to the medium format(55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e5.82kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\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\u003e\u003cstrong\u003e8.12kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM48\/M54\/M68 adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 40-70mm 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\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA106 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 class=\"e_text-36 s_title response-transition\"\u003e \u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/aaa.webp?v=1730930656\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003eSharpStar Warranty\u003c\/div\u003e\n\u003cp class=\"e_text-36 s_title response-transition\"\u003e \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","brand":"Askar","offers":[{"title":"Default Title","offer_id":46310197297381,"sku":"ASK-SQA106","price":4753.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_8003aae1-7f7b-43f4-95cb-01a4032979f6.webp?v=1730930888","url":"https:\/\/istronomyplus.com\/products\/askar-sqa106-f-4-8-quintuplet-apo-sqa106","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}