{"product_id":"askar-52mm-super-ed-guide-scope","title":"Askar 52mm Super ED Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e52mm Aperture\u003c\/li\u003e\n\u003cli\u003e249.6mm Focal Length (f\/4.8)\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Doublet Objective\u003c\/li\u003e\n\u003cli\u003eLightweight 0.74kg Design\u003c\/li\u003e\n\u003cli\u003eIncludes M42x0.75 and 1.25\" 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\u003e52mm Super ED Guide Scope\u003c\/h2\u003e\n\u003cp\u003eThe 52mm Super ED Guide Scope delivers a significant light-gathering advantage for autoguiding, combining a 52mm aperture and a 249.6mm focal length in a compact optical tube. Its fast f\/4.8 focal ratio provides a wide field for locating guide stars, and the entire assembly weighs just 0.74kg while measuring 255mm in length. The doublet objective lens design supports both M42×0.75 and 1.25\" adapters, ensuring broad compatibility with modern guide cameras and accessories.\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\u003e52mm f\/4.8 Doublet Optics for Brighter Guide Stars\u003c\/h3\u003e\n\u003cp\u003eAt the core of this guide scope is a 52mm air-spaced doublet objective that incorporates Super ED glass for excellent color correction and sharp star images. A larger aperture gathers more light, allowing your guide camera to detect fainter stars. This is a critical advantage when imaging in star-poor regions of the sky or when using narrowband filters that dim the starfield, ensuring a suitable guide star is always within reach.\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\u003e0.74kg Body with Helical Focuser \u0026amp; XY Adjustment\u003c\/h3\u003e\n\u003cp\u003eEngineered for stability without adding significant mass, the guide scope weighs only 0.74kg. Its CNC-machined body features an integrated helical focuser for smooth, precise adjustments without image shift. The mounting bracket includes XY-axis adjustment screws, allowing you to perfectly align the guide scope's field of view with your main telescope for maximum guiding accuracy.\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\u003eM42 \u0026amp; 1.25\" Adapters for Guiding, Imaging, and Visual Use\u003c\/h3\u003e\n\u003cp\u003eThis instrument is more than just a guide scope. With the included rear-end adapters, it can be configured for multiple tasks. Use the 1.25\" adapter for standard guide cameras, or thread the M42×0.75 adapter on for a rigid connection to planetary or deep-sky cameras. It can even be used for visual observation by adding a 1.25\" diagonal and eyepiece, turning it into a compact, wide-field refractor.\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\u003eBeyond Guiding: The 52mm Advantage Over 32mm Scopes\u003c\/h3\u003e\n\u003cp\u003eWhile a smaller 30mm or 32mm guide scope is lighter, the 52mm Super ED Guide Scope offers a decisive performance upgrade. Its larger aperture not only reveals more guide stars but also allows for shorter guide exposures, enabling your mount to respond more quickly to tracking errors. The well-corrected doublet objective produces tighter star shapes than the simple achromats found in smaller scopes, improving the centroid-calculating accuracy of your guiding software.\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 52mm Super ED Guide Scope improve guiding accuracy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e52mm aperture\u003c\/strong\u003e gathers significantly more light than smaller guide scopes, allowing for shorter guide camera exposures and the detection of fainter guide stars. This results in a higher signal-to-noise ratio and more frequent corrections sent to the mount, improving overall tracking precision.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 52mm Super ED Guide Scope for visual observation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. By attaching the included \u003cstrong\u003e1.25\" adapter\u003c\/strong\u003e, you can insert a 1.25\" star diagonal and eyepiece. This transforms the guide scope into a compact, wide-field refractor perfect for sweeping across the Milky Way or observing large objects like the Andromeda Galaxy (M31) or the Pleiades (M45).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the 0.74kg weight of this guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt just \u003cstrong\u003e0.74kg (1.63 lbs)\u003c\/strong\u003e, the guide scope is lightweight enough for most equatorial mounts capable of astrophotography, including entry-level mounts like the Sky-Watcher HEQ5 or similar. Its low weight minimizes the impact on the mount's total payload capacity, leaving more room for your main telescope and camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach my ZWO ASI120MM Mini guide camera to the 52mm Super ED Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ZWO ASI120MM Mini has a 1.25\" form factor. Simply insert the camera into the \u003cstrong\u003e1.25\" adapter\u003c\/strong\u003e on the guide scope, just as you would an eyepiece, and secure it with the thumbscrews. You can then use the helical focuser to achieve a sharp focus on the stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen guiding on a faint target like the Cocoon Nebula (IC 5146), will the 52mm aperture help find a guide star?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The region around the Cocoon Nebula is not rich in bright stars. The \u003cstrong\u003e52mm aperture\u003c\/strong\u003e is a significant advantage here, as it will reveal fainter stars that would be invisible to a smaller 30mm guide scope. This ensures you can find a suitable guide star without having to re-frame your main imaging target.\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 helical focuser on the 52mm Super ED Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA helical focuser provides fine focus control by rotating a barrel, which is ideal for guide scopes. It prevents the camera from shifting or rotating as you focus, ensuring the guide star remains centered. This is more precise and stable than simple push-pull or single-thumbscrew focusers found on basic models.\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\u003e52mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e249.6mm\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 Type\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Length\u003c\/td\u003e\n\u003ctd\u003e255mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight\u003c\/td\u003e\n\u003ctd\u003e0.74kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Adapters\u003c\/td\u003e\n\u003ctd\u003eM42×0.75 | 1.25\"\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\"\u003e52mm Super ED Guide Scope Body\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\"\u003eInstruction Manual\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":52851332481309,"sku":"ASK-ASKAR52SGS","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-52mm-Super-ED-Guide-Scope-1_ccc5f78f-6647-4f73-ac97-28e26bc2e35f.jpg?v=1788401705","url":"https:\/\/davidastro.com\/en-int\/products\/askar-52mm-super-ed-guide-scope","provider":"David Astro","version":"1.0","type":"link"}