{"product_id":"askar-65phq","title":"Askar 65PHQ f\/6.4 Quintuplet Flat-Field Astrograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e65mm Aperture Quintuplet APO Optical Design\u003c\/li\u003e\n\u003cli\u003e416mm Focal Length at f\/6.4\u003c\/li\u003e\n\u003cli\u003eBuilt-in Field Flattener with 44mm Image Circle\u003c\/li\u003e\n\u003cli\u003e2.8kg Total Weight Including Rings and Dovetail Plate\u003c\/li\u003e\n\u003cli\u003eIncludes M68, M54, and M48 Camera Adapters\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 65PHQ f\/6.4 Quintuplet Flat-Field Astrograph\u003c\/h2\u003e\n\u003cp\u003eThe Askar 65PHQ is a portable imaging instrument that delivers a perfectly flat 44mm image circle without external correctors. Its 65mm quintuplet objective lens, which includes two ED glass elements, operates at a focal length of 416mm and a focal ratio of f\/6.4 to produce high-contrast, color-pure images. Weighing just 2.8kg fully equipped, the 65PHQ provides a complete, travel-friendly solution for full-frame astrophotography.\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\u003eBuilt-in Flattener: A 44mm Flat Field Right Out of the Box\u003c\/h3\u003e\n\u003cp\u003eThe core of the 65PHQ is its Petzval-like quintuplet optical design. This integrated system eliminates the need for a separate field flattener, removing the complexity of calculating back focus and spacing. The result is a 44mm corrected image circle, capable of illuminating full-frame sensors with sharp stars from edge to edge. The inclusion of two ED (Extra-low Dispersion) glass elements ensures chromatic aberration is suppressed, preserving the natural color of stars and the subtle details in nebulae.\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\u003eCompact and Robust: 2.8kg of Imaging-Ready Engineering\u003c\/h3\u003e\n\u003cp\u003eDesigned for portability, the 65PHQ's optical tube weighs only 2kg, and the complete package with rings, handle, and dovetail plate comes in at a mere 2.8kg. Its contracted length of just 328mm makes it easy to pack and mount on lightweight, travel-friendly trackers. The scope features a 2.5\" rack-and-pinion focuser with a 360° rotator for precise camera framing, a retractable dew shield, and a Vixen-style dovetail plate, providing a rigid and stable platform for imaging.\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\u003eDirect-Thread Connection: M68, M54, and M48 Adapters Included\u003c\/h3\u003e\n\u003cp\u003eThe 65PHQ ensures a secure, flex-free connection to your imaging train. It includes a set of three photographic adapters, stepping down from the focuser's native M68x1 thread to M54x0.75 and finally to the widely used M48x0.75. This allows direct, threaded attachment of most astronomy cameras, filter wheels, and off-axis guiders. The final M48 adapter is also threaded internally to accept standard 2-inch astronomy filters.\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\u003eAstrograph and Visual Scope: f\/6.4 Versatility\u003c\/h3\u003e\n\u003cp\u003eWhile engineered as an astrograph, the 65PHQ is also a capable visual instrument. The f\/6.4 focal ratio provides bright, wide-field views of open clusters and large nebulae like the North American Nebula (NGC 7000). The high-quality optics also support higher magnification for observing planets and the Moon, making it a versatile grab-and-go telescope for both imaging and visual nights under the stars.\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\u003eAskar 65PHQ vs. 80PHQ: Portability Meets Optical Correction\u003c\/h3\u003e\n\u003cp\u003eThe primary advantage of the 65PHQ over its larger sibling, the 80PHQ, is its exceptional portability. The 65PHQ is lighter and more compact, making it a better match for smaller equatorial mounts and star trackers. Here’s how they compare:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 80PHQ Advantage:\u003c\/strong\u003e The 80mm aperture gathers more light and provides higher resolution, making it better suited for smaller, fainter targets. Its 600mm focal length offers more image scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar 65PHQ Advantage:\u003c\/strong\u003e With an OTA weight of only 2kg (vs. the 80PHQ's 3.2kg), the 65PHQ is significantly easier to mount and balance. Its wider 416mm field of view is ideal for capturing large nebulae and constellations in a single frame.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhat makes the Askar 65PHQ an \"astrograph\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe term \"astrograph\" signifies that the Askar 65PHQ is designed specifically for photography. Its \u003cstrong\u003equintuplet optical system\u003c\/strong\u003e has a built-in flattener that corrects for field curvature, ensuring stars remain sharp across its entire \u003cstrong\u003e44mm image circle\u003c\/strong\u003e without needing extra accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate flattener or reducer for the 65PHQ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Askar 65PHQ has a built-in field flattener as part of its native optical design. You do not need to purchase an additional flattener. Simply attach your camera using the included adapters, achieve focus, and you will have a corrected field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size camera sensor is the Askar 65PHQ designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 65PHQ is designed to fully illuminate and correct a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e. This makes it an excellent match for cameras with full-frame (36x24mm) sensors, as well as smaller APS-C and Micro Four Thirds sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 65PHQ frame a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its \u003cstrong\u003e416mm focal length\u003c\/strong\u003e, the Askar 65PHQ provides a wide field of view. When paired with a full-frame camera, it can easily capture the entire Andromeda Galaxy (M31), including its satellite galaxies M32 and M110, with plenty of surrounding space, making it ideal for large-scale mosaics or single-shot compositions of expansive deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 65PHQ on a portable mount for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With a total weight of only \u003cstrong\u003e2.8kg\u003c\/strong\u003e, the 65PHQ is an excellent choice for portable alt-azimuth or small equatorial mounts. For visual use, its f\/6.4 optics provide bright, expansive views, making it a superb \"grab-and-go\" telescope for sweeping the Milky Way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapters are included with the 65PHQ for connecting my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar 65PHQ comes with a 3-piece adapter set to ensure broad compatibility. The adapters provide threaded connections for \u003cstrong\u003eM68x1\u003c\/strong\u003e, \u003cstrong\u003eM54x0.75\u003c\/strong\u003e, and \u003cstrong\u003eM48x0.75\u003c\/strong\u003e, allowing you to securely attach most dedicated astronomy cameras and DSLRs\/mirrorless cameras with the appropriate T-ring.\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\u003e65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e416mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eQuintuplet air-spaced APO (including two ED glasses)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e2kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e2.8kg (Including tube rings \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e328mm (dew shield contracted) to 420mm (dew shield extended with adapters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Thread Type\u003c\/td\u003e\n\u003ctd\u003eM68×1, M54×0.75, M48×0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thread\u003c\/td\u003e\n\u003ctd\u003eM48×0.75 (inside M48 adapter)\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\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e65PHQ 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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eHandle\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\"\u003eAskar 300mm Vixen-style Dovetail Plate\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\"\u003e3-Piece Photographic Adapters\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Set\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\"\u003eManual\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":52851326124317,"sku":"ASK-65PHQ","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-65PHQ-1_bf592d2e-d6a8-49f2-b0a6-db0acc1c00d1.jpg?v=1788401643","url":"https:\/\/davidastro.com\/fr-int\/products\/askar-65phq","provider":"David Astro","version":"1.0","type":"link"}