{"product_id":"askar-sqa130","title":"Askar SQA130 f\/4.8 Quintuplet Petzval Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e130mm Aperture Quintuplet Petzval APO Optics\u003c\/li\u003e\n\u003cli\u003e624mm Focal Length at a Fast f\/4.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e55mm Corrected Image Circle for Medium Format Sensors\u003c\/li\u003e\n\u003cli\u003eIncludes Two SD (Super ED) Glass Elements\u003c\/li\u003e\n\u003cli\u003e11.76kg Gross Weight with Included Tube Rings \u0026amp; Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAskar SQA130 f\/4.8 Quintuplet Petzval Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar SQA130 combines a 130mm aperture with a fast f\/4.8 focal ratio, delivered through an advanced quintuplet Petzval optical system. This design, incorporating two pieces of SD glass, produces a massive 55mm corrected image circle, eliminating the need for a separate flattener while fully illuminating medium format sensors. With a native focal length of 624mm and a gross weight of 11.76kg, the SQA130 is a dedicated astrograph built for capturing wide, perfectly flat fields of deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e130mm f\/4.8 Quintuplet Petzval Optics: A 55mm Flat-Field Design\u003c\/h3\u003e\n\u003cp\u003eThe SQA130's optical core is a 5-element Petzval design, which places the correcting lenses inside the optical tube for a permanently optimized, flat field. This integrated system produces pinpoint stars across a huge 55mm image circle, exceeding the 44mm diagonal of full-frame sensors and accommodating larger medium format chips without vignetting or field curvature. The inclusion of two SD glass elements ensures high-contrast images with sharp stars and minimal chromatic aberration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSeamless Camera Integration: M68, M54, and M48 Adapters\u003c\/h3\u003e\n\u003cp\u003eAskar has engineered the SQA130 for direct and robust camera connection. The rear of the focuser terminates in an M68x1 thread, and the telescope includes M54 and M48 adapters to match the most common standards for full-frame cameras, filter wheels, and off-axis guiders. The system is designed for a recommended back focus of 55mm, but offers an adjustment range from 46mm to 76mm to accommodate nearly any imaging train configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEngineered for Stability: 11.76kg Gross Weight and 650mm Length\u003c\/h3\u003e\n\u003cp\u003eWith a total weight of 11.76kg including its tube rings and dovetail plate, the SQA130 requires a stable equatorial mount in the EQ6 class or greater for reliable tracking. The optical tube has a compact transport length of just 650mm with its dew shield retracted, which extends to 764mm to block stray light and mitigate dew formation during long imaging sessions. This robust mechanical build ensures the heavy-duty focuser can handle large camera packages without flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSQA130 vs. Triplet APOs: The Advantage of an Integrated Petzval Design\u003c\/h3\u003e\n\u003cp\u003eWhile a high-quality 130mm triplet refractor can produce excellent images, it requires a separate, correctly spaced field flattener to achieve a flat field, adding complexity and potential for tilt. The Askar SQA130's integrated Petzval design eliminates these variables entirely. You get a perfectly flat, wide field right out of the box with no extra accessories to buy or configure. The trade-off is a fixed focal length, but for imagers seeking a simple, powerful, and wide-field instrument, the SQA130 offers a more streamlined and reliable solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar SQA130's 55mm image circle handle large targets like the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 55mm image circle of the Askar SQA130 is significantly larger than the 44mm diagonal of a full-frame sensor. This means when imaging a vast object like the Andromeda Galaxy (M31), you will have perfectly sharp, unvignetted stars from one corner of your sensor to the other, capturing the full extent of the galaxy's spiral arms and dust lanes in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is required to properly support the 11.76kg gross weight of the Askar SQA130?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo ensure stable, precise tracking for long-exposure astrophotography, a mount with a payload capacity of at least 20kg (44 lbs) is recommended for the 11.76kg Askar SQA130. This typically corresponds to mounts in the Sky-Watcher EQ6-R Pro, iOptron CEM40\/GEM45, or a higher capacity class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy a separate field flattener for the Askar SQA130?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The \u003cstrong\u003equintuplet Petzval optical design\u003c\/strong\u003e of the Askar SQA130 has the field-flattening elements built directly into the optical tube. It is designed to produce a flat field across its 55mm image circle without any additional correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the quintuplet Petzval design in the Askar SQA130?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is simplicity and optical optimization. A Petzval design provides a wide, flat, and highly corrected field of view in a self-contained system. This means you don't have to worry about calculating the correct spacing for a separate flattener, which eliminates a common source of error and frustration in astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my camera to the Askar SQA130 to achieve the correct 55mm back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar SQA130 includes M68, M54, and M48 adapters. You simply choose the adapter that matches your camera or filter wheel threads and add standard spacers (not included) to achieve the \u003cstrong\u003e55mm recommended distance\u003c\/strong\u003e from the adapter's flange to your camera sensor. The system allows a total range of 46mm to 76mm for flexibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the two SD glass elements in the SQA130's objective lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003etwo pieces of SD (Super-low Dispersion) glass\u003c\/strong\u003e are used to minimize chromatic aberration, also known as color fringing. This ensures that stars of different colors come to the same sharp focus, resulting in higher contrast, tighter star points, and no distracting purple halos around bright stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e130mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e624mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens Design\u003c\/td\u003e\n\u003ctd\u003eQuintuplet Petzval APO (with 2 SD glass elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Image Circle\u003c\/td\u003e\n\u003ctd\u003e55mm (Medium Format), 44mm (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm recommended (46-76mm adjustable range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Adapters\u003c\/td\u003e\n\u003ctd\u003eM68, M54, M48 included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e650mm (dew shield contracted) \/ 764mm (dew shield extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e9.18kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e11.76kg (including tube rings and dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar_SQA130_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSQA130 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOxford Cloth Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52851326026013,"sku":"ASK-SQA130","price":6719.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-SQA130-1_678dcb0a-c045-451c-a2a6-1cfce92e0f54.jpg?v=1788401634","url":"https:\/\/davidastro.com\/products\/askar-sqa130","provider":"David Astro","version":"1.0","type":"link"}