{"product_id":"askar-50p-50mm-f-3-8-quadruplet-apo-astrograph","title":"Askar 50P 50mm f\/3.8 Quadruplet APO Astrograph","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Askar 50P is a compact 50mm f\/3.8 quadruplet Petzval APO astrograph designed for portable wide-field deep-sky imaging. With a 190mm focal length, SD glass in the objective design, and an M48 rear camera connection, it is built for travel-friendly astrophotography rigs, lightweight mounts, and modern CMOS cameras.\u003c\/p\u003e\n\u003cp\u003eThis telescope is optimized for 1-inch sensors and supports APS-C format use, making it a practical option for nebulae, large star fields, Milky Way regions, comet imaging, and other wide-field targets where speed and portability matter.\u003c\/p\u003e\n\n\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\n\u003cp\u003eThe 50P is best for beginner-to-intermediate astrophotographers who want a simple, portable imaging telescope, as well as advanced users looking for a lightweight grab-and-go wide-field astrograph. It is especially suitable for users with small cooled cameras, mirrorless camera adapters, or one-shot colour astronomy cameras.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFast f\/3.8 optical system for efficient deep-sky imaging.\u003c\/li\u003e\n  \u003cli\u003eQuadruplet Petzval APO design helps simplify field correction compared with traditional doublets or triplets.\u003c\/li\u003e\n  \u003cli\u003e50mm aperture and 190mm focal length make it excellent for large nebulae and wide star fields.\u003c\/li\u003e\n  \u003cli\u003eCompact 147mm contracted tube length for portable and travel imaging setups.\u003c\/li\u003e\n  \u003cli\u003eM48 rear connection with M48×0.75 filter thread for common astronomy camera accessories.\u003c\/li\u003e\n  \u003cli\u003eRecommended 55mm camera connection length with support for 50–65mm connection range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWide-field deep-sky astrophotography\u003c\/li\u003e\n  \u003cli\u003eNebula and Milky Way region imaging\u003c\/li\u003e\n  \u003cli\u003ePortable tracking-mount imaging rigs\u003c\/li\u003e\n  \u003cli\u003eOne-shot colour CMOS camera setups\u003c\/li\u003e\n  \u003cli\u003eTravel astrophotography with lightweight mounts\u003c\/li\u003e\n  \u003cli\u003eLarge-target imaging where a short focal length is preferred\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\n\u003cp\u003eThe 50P uses an M48 rear adapter with an M48×0.75 filter thread. It supports a rear-end connection distance from 50mm to 65mm, with 55mm recommended for typical imaging setups. The telescope is optimized for 1-inch sensors and supports APS-C format use. The standard package includes the 50P OTA and manual.\u003c\/p\u003e\n\u003cp\u003eFor autofocus, the separate Askar 50P AF Kit can be used with compatible electronic focusers. Camera adapters, filters, spacers, and electronic focusers are sold separately unless specifically included in a bundle.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eThis is primarily an imaging astrograph, not a general-purpose visual observing telescope.\u003c\/li\u003e\n  \u003cli\u003eCamera spacing still matters; the recommended connection length is 55mm.\u003c\/li\u003e\n  \u003cli\u003eLarge full-frame sensors are not the ideal match; the vendor specifies APS-C format support and optimization for 1-inch sensors.\u003c\/li\u003e\n  \u003cli\u003eA suitable tracking mount, camera, power, control hardware, and imaging accessories are required for astrophotography.\u003c\/li\u003e\n  \u003cli\u003eThe electronic focuser kit is not included with the standard 50P OTA package.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eIs the Askar 50P good for beginners?\u003c\/h3\u003e\n\u003cp\u003eYes, it can be a strong beginner astrophotography telescope because the short focal length is forgiving and the fast f\/3.8 focal ratio helps collect signal quickly. Beginners will still need a suitable mount, camera, and basic spacing setup.\u003c\/p\u003e\n\u003ch3\u003eWhat is it best used for?\u003c\/h3\u003e\n\u003cp\u003eIt is best used for wide-field deep-sky astrophotography, especially large nebulae, star fields, comet imaging, and portable imaging rigs.\u003c\/p\u003e\n\u003ch3\u003eIs it for visual observing or astrophotography?\u003c\/h3\u003e\n\u003cp\u003eIt is primarily recommended for astrophotography. Visual observing may require additional adapters and is not the main reason to choose this telescope.\u003c\/p\u003e\n\u003ch3\u003eWhat cameras work well with it?\u003c\/h3\u003e\n\u003cp\u003eSmall and medium astronomy cameras are the best match. The vendor lists APS-C format support and notes that the design is optimized for 1-inch sensors.\u003c\/p\u003e\n\u003ch3\u003eDoes it require additional accessories?\u003c\/h3\u003e\n\u003cp\u003eMost imaging setups will require a camera, mount, power\/control system, adapters or spacers, and possibly filters. Autofocus requires the separate 50P AF Kit and a compatible electronic focuser.\u003c\/p\u003e\n\u003ch3\u003eWhen should it not be recommended?\u003c\/h3\u003e\n\u003cp\u003eDo not choose it as a primary visual telescope, for high-magnification planetary imaging, or when a longer focal length is required for small galaxies or compact targets.\u003c\/p\u003e\n\n\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp\u003eOntario Telescope recommends the Askar 50P for customers who want a compact, fast, and easy-to-carry wide-field astrograph. It solves the problem of building a portable imaging system without moving to a large telescope and heavy mount. Choose a longer focal length telescope instead if your main targets are planets, small galaxies, or tight detail in compact objects.\u003c\/p\u003e\n\n\u003ch2\u003eOptical Diagram Reports\u003c\/h2\u003e\n\u003cp\u003eThe following vendor-supplied diagrams help show the 50P mechanical layout, camera connection path, focuser accessory arrangement, optical path, and spot performance.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/4b592863-0c9e-40b2-af5a-7881ceb98918.jpg\" alt=\"Askar 50P product size diagram for compact wide-field astrograph setup\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/53750a02-65d0-40b3-b979-f8990189ba27.jpg\" alt=\"Askar 50P camera connection diagram with M48 imaging adapter\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/262df748-2627-46dc-8157-bc61908350ef.jpg\" alt=\"Askar 50P electronic focuser assembly diagram for autofocus setup\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/ca61e887-1787-4d3d-8a49-01b8b40f5768.jpg\" alt=\"Askar 50P optical path diagram for astrophotography configuration\"\u003e\n\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/pg2024111409483993253\/cms\/image\/55962810-f3d9-403c-b203-4601f589f04a.jpg\" alt=\"Askar 50P spot diagram for wide-field astrophotography performance\"\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":53155932438639,"sku":"50P","price":418.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/50p1.webp?v=1779737209","url":"https:\/\/ontariotelescope.com\/products\/askar-50p-50mm-f-3-8-quadruplet-apo-astrograph","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}