{"title":"Guiding Equipment","description":"\u003cdiv\u003e\n  \u003cp\u003e\n    No mount tracks perfectly. Autoguiding measures the drift against a real star many times a minute and sends corrections, turning a mount that holds thirty seconds into one that holds ten minutes. It is the single change that most often takes an imager from discarding half their subs to keeping nearly all of them. David Astro carries autoguiding products in Canada — guide cameras, guide scopes and off-axis guiders — stocked in Canada and shipped worldwide.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    Whether you should guide through a separate scope or off the main optic depends almost entirely on focal length. Tell us yours and we will give you a direct answer.\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- more --\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eGuide Scopes, Off-Axis Guiders and Guide Cameras\u003c\/h2\u003e\n  \u003cp\u003e\n    All guiding does the same thing. The difference between methods is where the guide star comes from, and that determines whether flexure between two optical paths can corrupt your corrections.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/collections\/guide-scopes\"\u003eGuide scopes:\u003c\/a\u003e\u003c\/strong\u003e A small separate telescope with its own camera. Simple, easy to find stars with, and entirely adequate below roughly 800 mm focal length.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/collections\/off-axis-guiders\"\u003eOff-axis guiders:\u003c\/a\u003e\u003c\/strong\u003e A small prism picks a star from the edge of the main telescope's field, so guide and imaging paths are identical and differential flexure is eliminated.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGuide cameras:\u003c\/strong\u003e Small, sensitive sensors read out once or twice per second. Sensitivity matters most with an off-axis guider, where the available stars are dim and few.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGuiding rate and aggressiveness:\u003c\/strong\u003e Software settings that determine how strongly corrections are applied. Over-correction chases seeing and makes stars worse, not better.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMounting rigidity:\u003c\/strong\u003e A guide scope on a soft bracket flexes, and guiding faithfully corrects for a shift that never happened. Rigid mounting is not optional.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDithering:\u003c\/strong\u003e Shifting the frame slightly between exposures so that fixed-pattern sensor noise averages out during stacking — a guiding feature that visibly improves final images.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eWhy Choose David Astro for Autoguiding\u003c\/h2\u003e\n  \u003cp\u003e\n    Guiding problems are usually mechanical problems wearing a software costume. We start with the mechanics.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMethod chosen by focal length:\u003c\/strong\u003e We recommend guide scope or off-axis guider based on your imaging focal length and mount, rather than defaulting to whichever is cheaper.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFlexure diagnosis:\u003c\/strong\u003e If your guiding numbers look good but your stars are elongated, that is differential flexure and we will help you find it.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGuide camera matched to method:\u003c\/strong\u003e Off-axis guiding needs a more sensitive sensor than guide scope work, because you cannot choose your star.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAuthorized dealer:\u003c\/strong\u003e Genuine products with full manufacturer warranty, in Canadian stock.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSetup support:\u003c\/strong\u003e Help with calibration, guiding settings and dithering configuration after the sale.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eAutoguiding in Canada — Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003e\u003cstrong\u003eGuide scope or off-axis guider?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eGuide scope below about 800 mm focal length. Above that, differential flexure between two tubes typically exceeds your guiding tolerance and an off-axis guider becomes the reliable choice.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eMy guiding graph looks good but stars are elongated. Why?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eAlmost certainly flexure between guide and imaging paths, or in the imaging train itself. The guider corrects what it sees, and if the guide scope moved relative to the main scope, those corrections actively hurt.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eWhat guiding RMS should I aim for?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eBelow roughly half your imaging pixel scale in arcseconds. If you image at 1.5 arcseconds per pixel, total RMS under about 0.7 arcseconds keeps stars tight.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eIs dithering necessary?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eIt is one of the highest-value settings you can enable. Shifting a few pixels between subs breaks up fixed pattern noise and walking noise, and costs only a few seconds per exposure.\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eSetting up guiding?\u003c\/h2\u003e\n  \u003cp\u003eTell us your focal length and mount and we will recommend the method and hardware. Ships from Canada.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"celestron-off-axis-guider","title":"Celestron Off-Axis Guider","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eUses a 12.5 mm prism to intercept light from the telescope's optical path\u003c\/li\u003e\n\u003cli\u003eLarge 48mm clear aperture minimizes vignetting\u003c\/li\u003e\n\u003cli\u003e8 mm of travel on the helical focuser ensures precise guide camera focus\u003c\/li\u003e\n\u003cli\u003eIncludes a full set of adapters for SCT\/EdgeHD, M48, and M42 T-thread connections\u003c\/li\u003e\n\u003cli\u003eCorrects for tracking and opto-mechanical errors for pinpoint stars\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\u003eDownloads\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\u003eCelestron Off-Axis Guider (OAG)\u003c\/h2\u003e\n\u003cp\u003eThe Celestron Off-Axis Guider (OAG) eliminates tracking errors in long-exposure astrophotography by sampling the same light path as your main camera through a generous 48mm clear aperture. Its integrated 12.5 mm prism and 8 mm travel helical focuser work together to locate and sharply focus guide stars without introducing the flexure common with separate guide scopes. Weighing just 18 oz (510 g), it provides a rigid, single-path solution for achieving perfectly round stars, even with long focal length instruments.\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\u003eGuiding Through a 48mm Aperture: Eliminating Opto-Mechanical Flexure\u003c\/h3\u003e\n\u003cp\u003eFor long focal length imaging, the most significant source of elongated stars is often not the mount's tracking, but differential flexure between the main telescope and a separate guide scope. The Celestron OAG solves this by using the same optical tube for both imaging and guiding. With a 48mm clear aperture, it passes the full, unvignetted light cone to your main sensor while using an internal prism to pick off a small, peripheral section of the field for your guide camera. Any deviation seen by the guider is the exact same error affecting your main image, ensuring corrections are immediate and precise.\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\u003eThe 12.5mm Prism Advantage: Finding Brighter Guide Stars\u003c\/h3\u003e\n\u003cp\u003eA common frustration with off-axis guiders is the difficulty of finding a sufficiently bright guide star at the edge of the field. Celestron addresses this with a large 12.5 mm prism that intercepts more light and can be adjusted radially. This allows you to position the prism closer to the better-illuminated center of the light path—just outside your main camera's sensor—dramatically increasing the brightness and availability of usable guide 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\u003e8mm Helical Focuser: Precision Focus without Twisting\u003c\/h3\u003e\n\u003cp\u003eAchieving perfect, simultaneous focus for both the imaging camera and the autoguider is critical. The Celestron OAG incorporates a fixed-orientation helical focuser with 8 mm of travel, allowing you to make exceptionally fine and smooth focus adjustments to the guide camera without altering its orientation. This non-rotating mechanism prevents the guide star from drifting out of the field of view during focusing and ensures your calibration remains valid. The unit includes a complete set of adapters and spacers for SCT\/EdgeHD, M48, and M42 T-thread systems, providing a turnkey solution for most DSLR and dedicated astronomy cameras.\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\"\u003eWhy use the Celestron Off-Axis Guider instead of a separate guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary reason is to eliminate \u003cstrong\u003edifferential flexure\u003c\/strong\u003e. A guide scope is a separate telescope with its own mounting rings and focuser, all of which can shift minutely relative to the main telescope as it tracks across the sky. The Celestron OAG uses the main telescope's optics, so any flexure or mirror shift is seen by both the imaging camera and the guide camera simultaneously, allowing the autoguider to correct for it perfectly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I achieve focus with both my imaging camera and the Celestron OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFirst, achieve sharp focus with your main imaging camera through the OAG. Then, without changing the telescope's focus, adjust the OAG's \u003cstrong\u003e8 mm helical focuser\u003c\/strong\u003e until the stars in your guide camera are also sharp. The goal is to make the light path distance from the prism to the guide sensor equal to the distance from the OAG's center to your imaging sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 12.5 mm prism on the Celestron OAG vignette my full-frame camera sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, when properly adjusted. The prism is designed to be positioned just outside the light cone used by the main imaging sensor. The large 48mm clear aperture of the OAG body is sufficient for full-frame sensors, and you can slide the prism stalk radially outwards to ensure it does not cast a shadow on your imaging chip.\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 Celestron Off-Axis Guider?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Celestron OAG comes with a comprehensive set of adapters to fit most common imaging setups. Included are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSCT\/EdgeHD adapter (female thread to connect to the telescope)\u003c\/li\u003e\n\u003cli\u003eM48 and M42 (T-thread) female adapters for the telescope side\u003c\/li\u003e\n\u003cli\u003eM48 and M42 (T-thread) male adapters for the camera side\u003c\/li\u003e\n\u003cli\u003eThree T-thread extension spacers for achieving the correct back focus\u003c\/li\u003e\n\u003cli\u003eA 1.25\" adapter for the autoguider port\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Celestron OAG suitable for imaging planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, an off-axis guider is not necessary for planetary imaging. Planetary work involves taking thousands of very short exposures (video), where atmospheric turbulence is the main challenge, not mount tracking over long periods. The OAG is specifically designed for long-exposure deep-sky astrophotography of targets like the Andromeda Galaxy (M31) or the Orion Nebula (M42).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Celestron OAG with my 8\" f\/4 Newtonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but it can be challenging. Fast optical systems like f\/4 Newtonians have a very limited back focus and a more pronounced coma at the edge of the field, where the OAG prism sits. While the included adapters provide flexibility, you must ensure you have enough inward focuser travel to bring the entire imaging train to focus. The large 12.5 mm prism is a significant advantage here, as it helps find brighter guide stars in the comatic outer field.\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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e18 oz (510 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e48mm (1.89\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Size\u003c\/td\u003e\n\u003ctd\u003e12.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHelical Focuser Travel\u003c\/td\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003eSCT\/EdgeHD, M48, M42 T-thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM48, M42 T-thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoguider Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" adapter, M42 T-thread\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\"\u003eOff-Axis Guider 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\"\u003eSCT\/EdgeHD Adapter\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\"\u003eM48 Adapter (Female)\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\"\u003eM42 T-thread Adapter (Female)\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\"\u003eM48 Adapter (Male)\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\"\u003eM42 T-thread Adapter (Male)\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\"\u003eT-thread Spacers\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.celestron.com\/pages\/drivers-and-software\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Celestron Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967141572893,"sku":"CEL-93648","price":486.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Off-Axis-Guider-93648-1__70325.1594230226.1280.1280.jpg?v=1684337044"},{"product_id":"sky-watcher-evoguide-50dx-apo-refractor","title":"Sky-Watcher Evoguide 50DX APO Refractor","description":"\u003c!-- more --\u003e\u003cp\u003eThe EvoGuide 50DX Apo Guide Scope Astrograph takes Sky-Watcher's doublet design and packages it in a lightweight guide scope. These doublet refractors deliver dramatic, coal-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. Mounting to your guide camera is a breeze with convenient M42 rings on the back of the scope, and a beefy single-speed focus ring helps you nail focus. Although initially designed for guide cameras, the EvoGuide 50DX Apo Guide Scope Astrograph can be used to shoot fast, low focal length astrophotography when used in conjunction with a focal reducer (not included), producing stunning wide-field images. \u003c\/p\u003e\u003cp\u003eThis package includes the EvoGuide 50DX optical tube, tube rings, a finder stalk, and a V-style mounting plate. \u003c\/p\u003e\u003ch2\u003e\u003c\/h2\u003e\u003cdiv data-custom-tab=\"\"\u003e\u003cdiv\u003e\u003c\/div\u003e\u003c\/div\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44967189545245,"sku":"SW-S11174","price":520.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Sky-Watcher-Evoguide-50DX-S11174__06289.1633554136.1280.1280.jpg?v=1684338418"},{"product_id":"qhyccd-oag","title":"QHYCCD OAG","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIntegrated helical focuser for precise guide camera adjustment\u003c\/li\u003e\n\u003cli\u003eRigid, single-path design eliminates flexure from a separate guidescope\u003c\/li\u003e\n\u003cli\u003eLocking thumbscrew secures focus for consistent results\u003c\/li\u003e\n\u003cli\u003eAvailable in S, M, and L sizes to match different camera back-focus requirements\u003c\/li\u003e\n\u003cli\u003e7mm prism aperture provides a bright field for the guide camera\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\u003eQHYCCD Off-Axis Guider (OAG)\u003c\/h2\u003e\n      \u003cp\u003eThe QHYCCD OAG eliminates differential flexure by using the same light path for both imaging and guiding, sampling stars from the main telescope's field through a 7mm prism aperture. This design ensures your autoguiding system tracks the exact same movements seen by your primary imaging sensor, resulting in tighter, rounder stars.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eIntegrated Helical Focuser for Precise Guiding\u003c\/h3\u003e\n      \u003cp\u003eAchieving sharp focus on your guide camera is critical for accurate tracking, and the QHYCCD OAG features a built-in helical focuser to make this process simple and repeatable. A large thumbscrew allows you to lock the focuser position once perfect focus is achieved, preventing any drift during an imaging session. This fine focus control ensures your guiding software receives the highest quality data for making sub-pixel corrections.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eOAG-S, OAG-M, and OAG-L for Flexible Integration\u003c\/h3\u003e\n      \u003cp\u003eTo accommodate a wide range of imaging setups, the QHYCCD OAG is available in multiple sizes (Small, Medium, and Large). This ensures you can match the OAG's thickness to your camera's back-focus requirements, maintaining the correct sensor-to-corrector distance. A dedicated OAG-M model is also available specifically for use with the large-format QHY16200A camera, providing a rigid and optimized connection for demanding imaging trains.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the guide camera with the QHYCCD OAG?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe QHYCCD OAG has an integrated helical focuser. First, loosen the locking thumbscrew. Then, rotate the focusing ring until your guide stars are sharp. Once you have achieved focus, gently tighten the thumbscrew to lock the position. Avoid moving the focuser while it is locked to prevent damage.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the advantages of the QHYCCD OAG over a separate guidescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAn Off-Axis Guider offers two primary advantages over a traditional guidescope:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eEliminates Differential Flexure:\u003c\/strong\u003e The OAG uses the main telescope's optics, so the guide camera and imaging camera see the exact same field movement. This removes tracking errors caused by the guidescope's mounting rings or focuser sagging relative to the main telescope.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eReduces Weight and Complexity:\u003c\/strong\u003e It replaces an entire secondary telescope, reducing the overall payload on your mount and simplifying your setup.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow can the QHYCCD OAG help when imaging with my 11\" SCT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eSchmidt-Cassegrain telescopes (SCTs) can suffer from \"mirror flop,\" where the primary mirror shifts slightly during tracking, causing image drift that a separate guidescope cannot detect. Because the QHYCCD OAG picks off light *after* it has reflected off the primary mirror, it sees and corrects for this mirror movement, leading to significantly sharper long-exposure images.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich QHYCCD OAG model (S, M, or L) should I choose?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe correct choice depends on the back-focus requirements of your specific imaging train (camera, filter wheel, and corrector\/reducer). Each model has a different thickness. You should choose the model that allows you to place your main camera sensor at the precise back-focus distance specified by your telescope or flattener optics.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the QHYCCD OAG with a full-frame camera and a fast f\/4 Newtonian?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, but careful placement of the prism is key. In fast optical systems, the prism can cast a shadow on the main sensor if placed too far into the light path. You should position the prism just outside the field of view of your main imaging sensor to pick off guide stars from the edge of the corrected field without creating vignetting.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of guide camera works best with the QHYCCD OAG?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA sensitive, monochrome guide camera with small pixels is ideal. Models like the QHY5III series are excellent choices. Their high sensitivity allows them to detect fainter guide stars in the small field of view provided by the OAG's prism, which is especially important at long focal lengths or when imaging through narrowband filters.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAvailable Models\u003c\/td\u003e\n\u003ctd\u003eOAG-S, OAG-M, OAG-M for QHY16200A, OAG-L\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrism Aperture\u003c\/td\u003e\n\u003ctd\u003e7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eIntegrated Helical Focuser with Locking Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eQHYCCD Off-Axis Guider\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e(Selected Model)\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\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"OAG-M","offer_id":44967212876061,"sku":"QHY-100094","price":322.0,"currency_code":"CAD","in_stock":true},{"title":"OAG-M for 16200A","offer_id":44967212908829,"sku":"QHY-100101","price":322.0,"currency_code":"CAD","in_stock":true},{"title":"OAG-S","offer_id":44967212941597,"sku":"QHY-100073","price":252.0,"currency_code":"CAD","in_stock":true},{"title":"OAG-L","offer_id":44967212974365,"sku":"QHY-100075","price":392.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/16912_source_1595641578.jpg?v=1684339042"},{"product_id":"william-optics-50mm-guiding-scope","title":"William Optics 50mm Guiding Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Aperture Doublet Lens\u003c\/li\u003e\n\u003cli\u003e200mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4.0 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e1.25\" RotoLock Eyepiece Holder\u003c\/li\u003e\n\u003cli\u003eTotal Weight: 0.42 kg \/ 0.93 lbs\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\u003eWilliam Optics 50mm Guiding Scope\u003c\/h2\u003e\n\u003cp\u003eThe William Optics 50mm Guiding Scope combines a 50mm doublet objective with a fast f\/4.0 focal ratio to deliver a wide field of view for reliable autoguiding. Its 200mm focal length is optimized for finding guide stars easily, while the entire optical tube weighs only 0.42 kg (0.93 lbs), adding minimal load to your mount.\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\u003eWide-Field Guiding: A Fast f\/4.0, 200mm Optical System\u003c\/h3\u003e\n\u003cp\u003eThe core of this guide scope is its 50mm f\/4.0 optical system. This combination produces a 200mm focal length that yields a very wide field of view, dramatically increasing the odds of finding a suitable guide star in any part of the sky without having to re-frame your primary target. The fully multi-coated doublet lens ensures bright, high-contrast star images for your guide camera, enabling a stronger lock and more precise corrections.\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\u003eSecure \u0026amp; Lightweight: 1.25\" RotoLock at Just 0.42 kg\u003c\/h3\u003e\n\u003cp\u003eWeighing a mere 0.42 kg, this guide scope minimizes its impact on your mount's payload and reduces the potential for system flexure. A key feature is the integrated 1.25\" RotoLock adapter, a superior alternative to simple thumbscrews. The RotoLock provides a secure, self-centering grip on your guide camera, ensuring it remains perfectly aligned with the optical axis throughout your imaging session for consistent, error-free guiding.\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\"\u003eWhat makes the William Optics 50mm Guiding Scope's f\/4.0 focal ratio beneficial?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fast \u003cstrong\u003ef\/4.0 focal ratio\u003c\/strong\u003e, combined with the \u003cstrong\u003e200mm focal length\u003c\/strong\u003e, creates a very wide field of view. This allows your guide camera to see a larger patch of sky, dramatically increasing the number of potential guide stars available and making setup faster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 1.25\" RotoLock adapter on the William Optics scope improve guiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1.25\" RotoLock\u003c\/strong\u003e provides a secure, self-centering connection for your guide camera. Unlike thumbscrews that can cause tilt, the RotoLock ensures the camera sensor is perfectly aligned with the optical axis, which is critical for preventing guiding errors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 0.42 kg weight of the William Optics Guiding Scope significant?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. At only \u003cstrong\u003e0.42 kg (0.93 lbs)\u003c\/strong\u003e, the scope adds minimal weight and torque to your imaging setup. This reduces the risk of mechanical flexure and ensures your mount's tracking performance isn't compromised by an unnecessarily heavy accessory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 50mm guide scope with my 8\" SCT for imaging galaxies like M81?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent pairing. The \u003cstrong\u003e200mm focal length\u003c\/strong\u003e provides a good image scale for guiding an SCT. The wide field makes finding a suitable guide star near a relatively small target like the Bode's Galaxy (M81) much easier than with a longer, narrower guide scope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 200mm focal length precise enough for my wide-field refractor imaging the Cygnus Loop?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003e200mm focal length\u003c\/strong\u003e is a perfect match for wide-field imaging. It provides more than enough guiding accuracy for shorter focal length refractors, ensuring round stars across large mosaics of targets like the Veil Nebula complex (NGC 6960, etc.) without being overly sensitive to atmospheric seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen would an Off-Axis Guider be better than the William Optics 50mm scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile this 50mm guide scope is excellent for most systems, an Off-Axis Guider (OAG) is often preferred for very long focal length instruments (e.g., large RCs or SCTs) to eliminate differential flexure. An OAG samples the same light path as the imaging camera, correcting for any mirror shift that a separate guide scope cannot see.\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\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Type\u003c\/td\u003e\n\u003ctd\u003eDoublet Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e252 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.42 kg \/ 0.93 lbs\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\"\u003eWilliam Optics 50mm Guiding Scope\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\"\u003e1.25\" RotoLock Adapter\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\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Black","offer_id":44967214022941,"sku":"WO-M-G50NCIII","price":246.0,"currency_code":"CAD","in_stock":true},{"title":"Grey","offer_id":44967214055709,"sku":"WO-M-G50BWIII","price":213.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-50mm-Guide-Scope-1.jpg?v=1722279442"},{"product_id":"william-optics-slide-base-uniguide-50mm-scope","title":"William Optics Slide-Base UniGuide 50mm Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Aperture Doublet Lens\u003c\/li\u003e\n\u003cli\u003e200mm Focal Length (f\/4.0)\u003c\/li\u003e\n\u003cli\u003eIntegrated 1.25\" RotoLock Adapter\u003c\/li\u003e\n\u003cli\u003eSlide-Base for William Optics Handles\u003c\/li\u003e\n\u003cli\u003eTotal Weight: 0.5 kg \/ 1.1 lbs\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\u003eWilliam Optics Slide-Base UniGuide 50mm Scope\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Slide-Base UniGuide 50mm Scope combines a fast f\/4.0 optical system with a 200mm focal length to deliver a bright, wide field of view ideal for autoguiding. Its 50mm doublet lens gathers ample light for tracking faint guide stars, while the entire assembly weighs just 0.5 kg (1.1 lbs), adding minimal load to your imaging setup.\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\u003e50mm f\/4.0 Optics: Bright Stars Across a Wide Field\u003c\/h3\u003e\n\u003cp\u003eFinding a suitable guide star is simplified with the UniGuide's optical design. The 50mm aperture and fast f\/4.0 focal ratio produce bright, sharp star fields, ensuring your autoguider has plenty of targets to choose from. The 200mm focal length provides an ideal image scale for guiding short-to-medium focal length imaging telescopes with precision.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoublet Lens:\u003c\/strong\u003e The air-spaced doublet objective is fully multi-coated to maximize light transmission and contrast, critical for detecting faint stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Field of View:\u003c\/strong\u003e The combination of the 50mm aperture and 200mm focal length creates a generous field of view, reducing the time spent hunting for a guide star near your deep-sky target.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRotoLock \u0026amp; Slide-Base: A 0.5 kg Zero-Flexure Guiding System\u003c\/h3\u003e\n\u003cp\u003eThis guide scope eliminates two common sources of guiding error: camera sag and differential flexure. The innovative mechanical design ensures a rock-solid connection from your guide camera straight through to your main telescope, all within a lightweight 0.5 kg package.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" RotoLock Adapter:\u003c\/strong\u003e Forget flimsy thumbscrews. The RotoLock system secures your guide camera with a simple twist, creating a perfectly centered, non-marring, and rotation-free connection that prevents sag and tilt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlide-Base Integration:\u003c\/strong\u003e Designed for modern William Optics telescopes, the integrated base slides directly into the scope's handle, eliminating the need for separate guide rings and dovetail bars. This creates a more rigid, compact, and lighter guiding setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48 Threading:\u003c\/strong\u003e For additional mounting flexibility, an M48 male thread is located under the RotoLock adapter, allowing for direct connection to other accessories.\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\"\u003eHow do I mount the William Optics UniGuide 50mm scope to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UniGuide 50mm features an integrated slide-base designed to fit directly into the saddle of compatible William Optics carrying handles. This provides a secure, low-profile attachment without extra hardware. For mounting on telescopes from other brands or those without this handle design, you will need a separate Vixen-style dovetail bar that can be attached to the base of the guide scope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the RotoLock adapter on the UniGuide 50mm better than standard thumbscrews?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1.25\" RotoLock adapter\u003c\/strong\u003e provides a superior connection for your guide camera. Unlike thumbscrews, which can cause tilt and do not guarantee perfect centering, the RotoLock uses a rotating compression ring. This ensures your camera is held securely on-axis, preventing sag and flexure that can ruin long exposures. It also avoids scratching or denting your camera's nosepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the UniGuide 50mm work well for guiding my RedCat on a target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent match. The UniGuide's 200mm focal length pairs very well with wide-field refractors like the RedCat series. Its wide field of view makes it easy to find a bright guide star within the large expanse of a target like the Andromeda Galaxy (M31), ensuring sharp stars across your entire image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of guide cameras are compatible with the UniGuide 50mm scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics UniGuide 50mm is compatible with any guide camera that has a standard \u003cstrong\u003e1.25\" nosepiece\u003c\/strong\u003e. This includes popular models from ZWO, QHY, Player One, and others. The RotoLock adapter provides a secure grip on any standard 1.25\" barrel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 200mm focal length of the UniGuide 50mm a good match for an 8\" f\/8 Ritchey-Chrétien?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it can work, a 200mm focal length is on the shorter side for guiding a telescope with a focal length of 1600mm or more. For optimal guiding with a long focal length RC, astronomers often prefer a guide scope with a longer focal length or use an off-axis guider (OAG). However, for exposures under a few minutes with a good mount, the UniGuide 50mm can still provide acceptable results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the William Optics UniGuide 50mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The UniGuide features an \u003cstrong\u003eM48 male thread\u003c\/strong\u003e concealed beneath the 1.25\" RotoLock adapter. If you unscrew the RotoLock portion, you can attach accessories with a corresponding M48 female thread, such as a filter holder or other adapters, though this is not a common application for a guide scope.\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\u003eLens Type\u003c\/td\u003e\n\u003ctd\u003eDoublet Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e200 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e252 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg \/ 1.1 lbs\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\"\u003eWilliam Optics Slide-Base UniGuide 50mm Scope\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\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Black and red","offer_id":50843684569373,"sku":"WO-M-G50PB-BR","price":275.0,"currency_code":"CAD","in_stock":true},{"title":"Red","offer_id":44967216775453,"sku":"WO-M-G50PB-WR","price":275.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":44967216709917,"sku":"WO-M-G50PB-WG","price":275.0,"currency_code":"CAD","in_stock":true},{"title":"Grey","offer_id":44967216808221,"sku":"WO-M-G50PB-TG","price":275.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-Uniguide-50mm.png?v=1722279198"},{"product_id":"william-optics-slide-base-uniguide-32mm-scope","title":"William Optics Slide-Base UniGuide 32mm Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e32mm Doublet Objective Lens\u003c\/li\u003e\n\u003cli\u003eFast f\/3.75 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e120mm Focal Length\u003c\/li\u003e\n\u003cli\u003eIntegrated Vixen\/Synta-Style Slide-Base\u003c\/li\u003e\n\u003cli\u003eUltra-Lightweight at 0.23 kg (0.51 lbs)\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\u003eWilliam Optics Slide-Base UniGuide 32mm Scope\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Slide-Base UniGuide 32mm Scope integrates a fast f\/3.75 optical system with a 120mm focal length into a rigid, featherlight 0.23 kg assembly. Its 32mm doublet objective lens provides bright, sharp guide stars, while the compact 147mm tube and integrated slide-base mount are engineered to eliminate the differential flexure that plagues traditional ring-mounted guide scopes.\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\u003eFast f\/3.75 Optics: A 32mm Doublet for Bright Guide Stars\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the UniGuide is a 32mm air-spaced doublet lens with full multi-coatings. This design delivers high-contrast images, rendering potential guide stars as sharp, tight points. The fast f\/3.75 focal ratio works with the 120mm focal length to produce a bright image, allowing your guide camera to use shorter exposures and track stars more effectively, even in areas of the sky with fewer bright targets.\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\u003eIntegrated Slide-Base Mount: A Rigid 0.23 kg Guiding Solution\u003c\/h3\u003e\n\u003cp\u003eWeighing only 0.23 kg (0.51 lbs), the UniGuide adds minimal load to your mount. Its key innovation is the integrated Vixen\/Synta-style slide-base, designed to attach directly to the handle bar or saddle of compatible William Optics telescopes. This single-piece construction creates a solid, flex-free connection between your imaging scope and guide scope, which is critical for maintaining accurate tracking over long exposures.\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\u003e1.25\" and M42 Threads: Universal Guide Camera Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe UniGuide is designed for broad compatibility with the most popular guide cameras on the market. It features a standard 1.25\" eyepiece holder with a secure locking mechanism, as well as a male M42x0.75 T-thread for direct, rigid connection to cameras that support it. This dual-interface system ensures you can securely mount compact guiders like the ZWO ASI120MM Mini or Starlight Xpress Lodestar for a stable, reliable setup.\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\u003eThe 0.23 kg UniGuide vs. Rings: Eliminating Differential Flexure\u003c\/h3\u003e\n\u003cp\u003eTraditional guide scopes rely on adjustable rings, which introduce multiple points of potential sag, slippage, and flexure as the telescope tracks across the sky. The UniGuide's 0.23 kg, single-body design bypasses this entire problem. By mounting directly and rigidly to the main optical tube, it ensures both telescopes move as one, eliminating a primary source of elongated stars and improving the quality of your final images.\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\"\u003eWhat guide cameras are compatible with the William Optics UniGuide 32mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UniGuide 32mm is compatible with a wide range of guide cameras thanks to its dual connection options. You can use any camera with a \u003cstrong\u003e1.25\" nosepiece\u003c\/strong\u003e or one that can connect via a standard \u003cstrong\u003eM42 T-thread\u003c\/strong\u003e. This includes popular models like the ZWO ASI120 Mini, QHY5L-II, and Starlight Xpress Lodestar.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount the UniGuide 32mm Scope to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UniGuide features an integrated \u003cstrong\u003eVixen\/Synta-style slide-base\u003c\/strong\u003e. This allows it to mount directly onto the carrying handle or saddle of most William Optics telescopes without any additional rings or hardware, ensuring a quick, simple, and rigid connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 120mm focal length of the UniGuide 32mm suitable for guiding an 8\" SCT at f\/10?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Modern guiding software is extremely accurate at calculating star centroids to a sub-pixel level. The 120mm focal length of the UniGuide provides a wide field of view to easily find guide stars and is more than precise enough to guide a telescope with a focal length of 2000mm or more, such as a typical 8\" SCT.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the UniGuide's slide-base over traditional guide rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is the elimination of \u003cstrong\u003edifferential flexure\u003c\/strong\u003e. Traditional rings can sag or allow the guide scope to shift slightly relative to the main telescope, causing guiding errors. The UniGuide's rigid, one-piece mounting system ensures both scopes move in perfect unison, leading to sharper, rounder stars in your long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the UniGuide 32mm work with a non-William Optics telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, as long as your telescope has a Vixen-style saddle clamp available where you want to mount the guide scope. The UniGuide's base conforms to the standard Vixen\/Synta profile, so it can be attached to any compatible saddle, not just those on William Optics telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging the North American Nebula (NGC 7000) with a wide-field refractor; is the UniGuide 32mm a good match?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UniGuide 32mm is an excellent match for wide-field refractors. Its light weight of 0.23 kg keeps the entire imaging payload balanced and manageable. The 120mm focal length provides a very wide field of view, making it extremely easy to find a suitable guide star within the expansive star fields around targets like the North American Nebula (NGC 7000).\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\u003eLens Type\u003c\/td\u003e\n\u003ctd\u003eDoublet Lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e32 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length\u003c\/td\u003e\n\u003ctd\u003e147 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.23 kg \/ 0.51 lbs\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\"\u003eWilliam Optics UniGuide 32mm Scope with Integrated Slide-Base\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\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Red","offer_id":44967216906525,"sku":"WO-M-G32PB-RD","price":189.0,"currency_code":"CAD","in_stock":true},{"title":"Grey","offer_id":44967216873757,"sku":"WO-M-G32PB-TG","price":189.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":44967216840989,"sku":"WO-M-G32PB-GD","price":189.0,"currency_code":"CAD","in_stock":true},{"title":"Blue","offer_id":48958897848605,"sku":"WO-M-G32PB-BU","price":189.0,"currency_code":"CAD","in_stock":true},{"title":"Black","offer_id":52839936360733,"sku":"WO-M-G32PB-BR","price":189.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-Uniguide-32mm.png?v=1722104957"},{"product_id":"william-optics-guide-star-61","title":"William Optics GuideStar 61","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFPL53 ED Air-Spaced Doublet Lens\u003c\/li\u003e\n\u003cli\u003eDual-Purpose Guide Scope and Imaging Telescope\u003c\/li\u003e\n\u003cli\u003eDraw-Tube (Push-Pull) Focuser\u003c\/li\u003e\n\u003cli\u003eRotating Lens Assembly for Image Framing\u003c\/li\u003e\n\u003cli\u003eCNC-Machined Aluminum Construction\u003c\/li\u003e\n\u003cli\u003eVixen\/Synta-Style Finder Dovetail Rail\u003c\/li\u003e\n\u003cli\u003eIncludes Padded Soft Carry Case\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\u003eWilliam Optics GuideStar 61 APO Refractor\u003c\/h2\u003e\n\u003cp\u003eThe William Optics GuideStar 61 uses an FPL53 ED doublet, the same 2-element lens found in the Zenithstar 61, for pure apochromatic performance. This single optical tube serves two critical roles for astrophotographers: a primary wide-field imager and a high-precision guide scope. Its design ensures one outcome for either application: sharp, high-contrast images free of false color, making it a crucial tool for any advanced setup.\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\u003eApochromatic Optics: The FPL53 ED Doublet Core\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the GuideStar 61 is an air-spaced doublet lens featuring premium FPL53 glass. This is the exact same optical design that earned the Zenithstar 61 its reputation for producing stunningly sharp, high-contrast images. The result is a view completely free of distracting chromatic aberration, ensuring stars are tight pinpoints against a dark sky background, a critical requirement for both precise guiding and quality 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\u003eImaging Mechanics: Draw-Tube Focuser and Rotating Lens Assembly\u003c\/h3\u003e\n\u003cp\u003eEngineered for portability and simplicity, the GuideStar 61 features a practical draw-tube (push-pull) focuser for coarse adjustments, with a rotating lens assembly for fine-tuning focus. This lightweight system is ideal for guide cameras and smaller imaging cameras where robust, heavy focusers are unnecessary. The entire optical tube is CNC-machined from aluminum, providing a rigid and durable platform that holds collimation, and includes a Vixen\/Synta-style rail for easy mounting.\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\u003eDual-Role Functionality: A Precision Guider and Portable Imager\u003c\/h3\u003e\n\u003cp\u003eThe GuideStar 61 is designed as a flexible, high-end solution for two distinct tasks. As a guide scope, its apochromatic optics deliver perfectly round guide stars, allowing your autoguiding software to make more accurate tracking corrections. As a primary imaging instrument, it becomes a powerful wide-field astrograph, capable of capturing entire nebulae or star clusters when paired with the optional Adjustable Flattener or 0.8x Reducer\/Flattener for the ZS61.\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\u003eGuideStar 61 vs. Zenithstar 61: Shared Optics, Different Missions\u003c\/h3\u003e\n\u003cp\u003eWhile both telescopes share the same superb FPL53 doublet lens, their mechanical systems are tailored for different purposes. The GuideStar 61 is the lighter, more portable option, with a simple and effective draw-tube focuser perfect for guiding or use with lightweight cameras. The Zenithstar 61, in contrast, incorporates a heavier, more precise rack-and-pinion focuser designed to handle larger cameras and accessories, making it the dedicated choice for primary deep-sky imaging.\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\"\u003eWhat is the main difference between the William Optics GuideStar 61 and the Zenithstar 61?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBoth models use the identical FPL53 ED doublet lens, so their optical quality is the same. The primary difference is mechanical: the \u003cstrong\u003eGuideStar 61\u003c\/strong\u003e has a lightweight draw-tube focuser designed for guiding and portability, while the \u003cstrong\u003eZenithstar 61\u003c\/strong\u003e has a more robust rack-and-pinion focuser to support heavier imaging cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the GuideStar 61 be used as a primary imaging telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The GuideStar 61's FPL53 optics make it an excellent portable, wide-field imaging refractor. For optimal results across a larger sensor, it is best paired with an optional field flattener, such as the William Optics Adjustable Flattener for ZS61.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the draw-tube focuser on the GuideStar 61 work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe GuideStar 61 uses a simple and reliable draw-tube, or \"push-pull,\" focuser. You achieve coarse focus by sliding the tube in and out, then lock it. Fine focus adjustments are then made by rotating the lens cell assembly itself, allowing for precise focus on your guide star or imaging target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the GuideStar 61 perform for guiding on a large SCT imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt would perform exceptionally well. The apochromatic FPL53 optics of the GuideStar 61 will produce very sharp, tight stars across the field of view of your guide camera. This allows your software to calculate a more accurate centroid, leading to smoother and more precise tracking corrections, which is essential for long exposures on a target like M31 with a long focal length SCT.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat accessories are needed to use the GuideStar 61 for imaging the North America Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo image a large target like the North America Nebula, you would need a solid mount, a guide camera (if using it as a guide scope), and your primary astronomy camera. To ensure sharp stars to the edge of your frame, a dedicated field flattener like the Adjustable Flattener for ZS61 is highly recommended. The optional 0.8x reducer\/flattener would provide an even wider field of view to capture the entire nebula complex.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the FPL53 lens in the William Optics GuideStar 61 truly apochromatic?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The use of FPL53, a high-grade extra-low dispersion (ED) glass, in an air-spaced doublet configuration effectively eliminates false color (chromatic aberration). This provides images with sharp focus across the visual spectrum, high contrast, and no purple fringing around bright stars, meeting the definition of an apochromatic refractor.\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\u003eAvailable Options\u003c\/td\u003e\n\u003ctd\u003eRed, Gold, Blue\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\"\u003eGuideStar 61 Optical Tube Assembly\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\"\u003eSoft Carry Case\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\"\u003eVixen\/Synta-style finder dovetail rail\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\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Red","offer_id":44967234339101,"sku":"WO-M-GS61-RD","price":631.0,"currency_code":"CAD","in_stock":true},{"title":"Gold","offer_id":44967234273565,"sku":"WO-M-GS61-GD","price":549.0,"currency_code":"CAD","in_stock":true},{"title":"Blue","offer_id":44967234306333,"sku":"WO-M-GS61-BU","price":549.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-GuideStar-61-1.jpg?v=1722277641"},{"product_id":"william-optics-slide-base-50mm-guiding-rings-no-adjustments-screws","title":"William Optics Slide-Base 50mm Guiding Rings - No Adjustments Screws","description":"\u003cul\u003e\n\t\u003cli\u003eSeamlessly integrate with your existing astrophotography gear.\u003c\/li\u003e\n\t\u003cli\u003eEnsures stable attachment of your telescope to your mount.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\t\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\t\u003cli\u003eIn the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\t\u003cli class=\"active\"\u003e\n\t\t\u003cp\u003eEnhance your astrophotography setup with the William Optics Slide-Base 50mm Guiding Rings, designed for precise guiding without the need for adjustment screws.\u003c\/p\u003e\n\n\t\t\u003cdiv\u003e\n\t\t\t\u003ch3\u003eKey Features\u003c\/h3\u003e\n\t\t\t\u003chr\u003e\n\t\t\t\u003cdiv class=\"two-columns-section\"\u003e\n\t\t\t\t\u003cdiv class=\"text-side-2\"\u003e\n\t\t\t\t\t\u003cp\u003e\n\t\t\t\t\t\tHere are some key benefits and features:\n\t\t\t\t\t\u003c\/p\u003e\n\t\t\t\t\t\u003cul\u003e\n\t\t\t            \u003cli\u003e\n\u003cb\u003eSlide-Base Design:\u003c\/b\u003e Allows for effortless adjustment and fine-tuning of guiding scopes.\u003c\/li\u003e\n\t\t\t            \u003cli\u003e\n\u003cb\u003eNo Adjustment Screws:\u003c\/b\u003e Simplifies setup and reduces maintenance.\u003c\/li\u003e\n\t\t\t            \u003cli\u003e\n\u003cb\u003eSecure Mounting:\u003c\/b\u003e Ensures stability during long exposure photography sessions.\u003c\/li\u003e\n\t\t\t            \u003cli\u003e\n\u003cb\u003eDurable Construction:\u003c\/b\u003e Crafted from high-quality materials for reliability and longevity.\u003c\/li\u003e\n\t\t\t            \u003cli\u003e\n\u003cb\u003eCompatibility:\u003c\/b\u003e Compatible with most telescopes and mounting systems.\u003c\/li\u003e\n\t\t\t        \u003c\/ul\u003e\n\t\t\t\t\u003c\/div\u003e\n\t\t\t\t\u003cdiv class=\"image-side-2\" data-mce-style=\"text-align: start;\" style=\"text-align: start;\"\u003e\n\t\t\t\t\t\u003cimg src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/William-Optics-Slide-Base-50mm-Guiding-Rings-M-GR50IISL-1__46491.1596133322.1280.1280_832x832.jpg?v=1684339652\" style=\"margin-bottom: 16px; float: none;\" alt=\"William Optics Slide-Base 50mm Guiding Rings - No Adjustments Screws\"\u003e\n\t\t\t\t\u003c\/div\u003e\n\t\t\t\u003c\/div\u003e\n\t\t\u003c\/div\u003e\n\t\t\u003cdiv\u003e\n\t\t\t\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\t\t\t\u003chr\u003e\n\t\t\t\u003cp\u003eAstrophotographers seeking precise guiding solutions for improved tracking.\u003cbr\u003eEnthusiasts looking to enhance their telescope setup with reliable accessories.\u003c\/p\u003e\n\t\t\u003c\/div\u003e\n\t\u003c\/li\u003e\n\t\u003cli\u003e\n\t\t\u003cul\u003e\n\t\t\t\u003cli\u003eSlide-Base 50mm Guiding Rings\u003c\/li\u003e\n\t\t\u003c\/ul\u003e\n\t\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44967240728861,"sku":"WO-M-GR50IISL","price":92.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/William-Optics-Slide-Base-50mm-Guiding-Rings-M-GR50IISL-1__46491.1596133322.1280.1280.jpg?v=1684339652"},{"product_id":"william-optics-slide-base-50mm-guiding-rings","title":"William Optics Slide-Base 50mm Guiding Rings","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSecurely holds guidescopes and finders with a 50mm tube diameter\u003c\/li\u003e\n\u003cli\u003eSlide-base design allows for fore-and-aft adjustment for precise balancing\u003c\/li\u003e\n\u003cli\u003eEssential for eliminating tracking errors caused by an imbalanced imaging rig\u003c\/li\u003e\n\u003cli\u003eFeatures thumbscrews for fine-pointing adjustments to center a guide star\u003c\/li\u003e\n\u003cli\u003eSignature William Optics fit and finish for durability and ease of use\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\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\u003eWilliam Optics Slide-Base 50mm Guiding Rings\u003c\/h2\u003e\n      \u003cp\u003eThe William Optics Slide-Base 50mm Guiding Rings are a fundamental component for serious astrophotographers, offering a secure, adjustable mounting solution for any guidescope with a 50mm tube diameter. This ring set's primary function is to enable perfect balance of your entire imaging payload, a critical step for achieving the sharpest possible long-exposure images with your 50mm guide scope.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eA Secure Mount for 50mm Class Guidescopes\u003c\/h3\u003e\n      \u003cp\u003eThese rings are engineered to firmly hold your 50mm guidescope, preventing any flexure or slippage that could ruin a sub-exposure. Equipped with adjustment thumbscrews, you can easily aim your guidescope independently of your main telescope, making the process of finding and centering a suitable guide star quick and simple. This ensures your autoguider has a solid lock, night after night.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe Slide-Base Advantage: Balancing Your 50mm Guide System\u003c\/h3\u003e\n      \u003cp\u003eThe key feature of this design is the slide-base, which allows you to move your 50mm guidescope forward or backward along the telescope's optical axis. This capability is crucial for achieving perfect balance in both right ascension and declination. An imbalanced rig forces your mount's motors to work harder, introducing tracking errors that result in elongated stars; these rings directly solve that problem by giving you fine control over your setup's center of gravity.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the William Optics Slide-Base 50mm Guiding Rings over fixed rings?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary advantage is \u003cstrong\u003ebalance\u003c\/strong\u003e. Fixed rings lock your guidescope in one position, but the \u003cstrong\u003eWilliam Optics Slide-Base 50mm Guiding Rings\u003c\/strong\u003e allow you to slide the guidescope fore and aft. This adjustment is critical for precisely balancing your entire telescope and camera payload, which reduces strain on your mount and improves autoguiding accuracy.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the William Optics 50mm Guiding Rings fit a guidescope from another brand?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The William Optics 50mm Guiding Rings are designed to work with any guidescope or finderscope that has an outer tube diameter of \u003cstrong\u003e50mm\u003c\/strong\u003e, regardless of the manufacturer.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do these WO Slide-Base 50mm Rings help balance a heavy setup like an 8\" SCT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor a telescope like an 8\" SCT with a camera and other accessories, achieving perfect balance is difficult. The \u003cstrong\u003eWilliam Optics Slide-Base 50mm Guiding Rings\u003c\/strong\u003e provide a second axis of adjustment. After balancing the main scope, you can slide the guidescope within the rings to fine-tune the balance point without having to move the entire telescope in its saddle, leading to much better tracking.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mounting plate do I need for the William Optics Slide-Base 50mm Guiding Rings?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThese rings are designed to be mounted onto a compatible base, such as the saddle handle found on many William Optics telescopes or a universal dovetail bar that accepts this type of sliding base. This allows the rings to move freely for balancing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eMy William Optics RedCat 51 is hard to balance. Will these 50mm rings help?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. Compact, wide-field refractors like the RedCat 51 can become unbalanced quickly when a guidescope and camera are added. The \u003cstrong\u003eWilliam Optics Slide-Base 50mm Guiding Rings\u003c\/strong\u003e are an ideal solution, as they allow you to precisely counteract the weight of your accessories and achieve the perfect balance necessary for sharp, round stars.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the William Optics Slide-Base 50mm Rings for a finderscope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. If your finderscope has a \u003cstrong\u003e50mm\u003c\/strong\u003e tube diameter, these rings will hold it securely. The slide-base functionality also allows you to position the finder eyepiece at a more comfortable viewing angle.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatible Guidescope Diameter\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Style\u003c\/td\u003e\n\u003ctd\u003eSlide-Base\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003eSlide-Base 50mm Guiding Rings\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44967240794397,"sku":"WO-M-GR50SL","price":105.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/William-Optics-Slide-Base-50mm-Guiding-Rings-M-GR50SL-1__06866.1596133323.1280.1280.jpg?v=1684339658"},{"product_id":"william-optics-120mm-saddle-handle-bar-with-50mm-guiding-rings-no-adjustments-screws","title":"William Optics 120mm Saddle Handle Bar with 50mm Guiding Rings - No Adjustments Screws","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e120 mm Length\u003c\/li\u003e\n\u003cli\u003eIntegrated 50mm Guide Rings\u003c\/li\u003e\n\u003cli\u003eMini-Vixen Style Top Saddle\u003c\/li\u003e\n\u003cli\u003e44 mm Width\u003c\/li\u003e\n\u003cli\u003eDesigned for Maximum Rigidity\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\u003eWilliam Optics 120mm Saddle Handle Bar with 50mm Guiding Rings\u003c\/h2\u003e\n\u003cp\u003eThe William Optics 120mm Saddle Handle Bar combines a secure carrying handle with an integrated 44mm wide Mini-Vixen style saddle for mounting accessories. Designed for absolute rigidity, this 120mm long handle features a pair of fixed 50mm guide rings, creating a streamlined and flexure-free platform for a compact autoguiding system.\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\u003eDual-Function Design: A 120mm Handle and Mini-Vixen Saddle\u003c\/h3\u003e\n\u003cp\u003eThis handle simplifies both the transport and the outfitting of your telescope. The 120mm length provides a sturdy, comfortable grip for carrying your optical tube, reducing the risk of drops during setup and teardown. Once mounted, the top surface acts as a Mini-Vixen saddle, allowing you to securely attach guide scopes, finderscopes, or other accessories with a standard V-style dovetail.\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\u003eIntegrated 50mm Guide Rings for a Rigid, Non-Adjustable Setup\u003c\/h3\u003e\n\u003cp\u003eBy eliminating adjustment screws, William Optics has engineered these 50mm guide rings for maximum stability. This design choice removes a common source of differential flexure, ensuring your guide scope and main imaging telescope remain perfectly parallel throughout an imaging session. This results in tighter stars and removes a frustrating variable from your guiding workflow.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this rigidity is a lack of independent aiming for the guide scope. You will rely on the wide field of view of your 50mm guide scope and modern guiding software like PHD2 to automatically locate a suitable guide star within the frame.\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\u003eChoosing Your Guiding Philosophy: Non-Adjustable vs. Adjustable Rings\u003c\/h3\u003e\n\u003cp\u003eThe choice between this handle and one with adjustable rings comes down to your priorities. An adjustable system offers the flexibility to manually point your guide scope toward a brighter guide star, which can be useful in star-poor regions of the sky. This non-adjustable version prioritizes mechanical simplicity and absolute rigidity. With no screws to work loose or shift, it provides a solid, set-and-forget mounting solution that virtually eliminates guiding errors caused by hardware flex.\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\"\u003eWhat is the benefit of the William Optics 120mm handle bar having non-adjustable 50mm rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is \u003cstrong\u003erigidity\u003c\/strong\u003e. By removing adjustment screws, William Optics eliminates a potential source of differential flexure. This ensures your guide scope and imaging scope remain perfectly aligned, leading to better guiding accuracy and sharper stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I mount on the Mini-Vixen saddle of this WO handle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Mini-Vixen saddle is compatible with any accessory that uses a standard Vixen (V-style) dovetail bar. This includes most finderscopes, guide scopes (like the William Optics UniGuide series), and other small astronomical accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 120mm length of this handle suitable for a portable setup with a William Optics RedCat or ZenithStar telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, its compact 120mm length is an excellent match for smaller William Optics refractors like the RedCat, ZenithStar, and Gran Turismo series. It provides essential handle and guiding functionality without adding unnecessary weight or bulk to a portable imaging rig.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I center a guide star using the WO 120mm handle if the 50mm rings don't have adjustment screws?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou rely on the wide field of view of your guide scope and your guiding software. A typical 50mm guide scope provides a large enough patch of sky that software like \u003cstrong\u003ePHD2 Guiding\u003c\/strong\u003e can almost always find a suitable guide star automatically without any need for manual aiming.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this handle bar fit non-William Optics telescopes?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt may, but compatibility depends on the mounting hole spacing on the top of your telescope's tube rings. This handle is designed specifically for the hole patterns found on William Optics telescopes, so you should measure your scope's ring spacing before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Mini-Vixen saddle on the WO 120mm handle compatible with standard Losmandy-style dovetail plates?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The saddle is designed for the narrower Vixen-style (V-style) dovetail profile. It is not wide enough to accept a larger Losmandy-style (D-style) plate.\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\u003eLength\u003c\/td\u003e\n\u003ctd\u003e120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop Saddle Dovetail Type\u003c\/td\u003e\n\u003ctd\u003eMini-Vixen (V-Style)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Ring Inner Diameter\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Ring Adjustment\u003c\/td\u003e\n\u003ctd\u003eNone (Fixed)\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\"\u003e120mm Saddle Handle Bar with 50mm Guiding Rings\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\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44967241679133,"sku":"WO-M-HC120BL-GR50IISL","price":140.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/William-Optics-120mm-Saddle-Handle-Bar-with-50mm-Guiding-Rings-M-HC120BL-GR50IISL-1__92525.1596133327.1280.1280.jpg?v=1684339685"},{"product_id":"william-optics-120mm-saddle-handle-bar-with-50mm-guiding-rings","title":"William Optics 120mm Saddle Handle Bar with 50mm Guiding Rings","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e120 mm Total Length\u003c\/li\u003e\n\u003cli\u003ePatented Handle and Saddle Design\u003c\/li\u003e\n\u003cli\u003eMini-Vixen Dovetail Saddle\u003c\/li\u003e\n\u003cli\u003eIncludes 50mm Guide Rings\u003c\/li\u003e\n\u003cli\u003e44 mm Width\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\u003eDownloads\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\u003eWilliam Optics 120mm Saddle Handle Bar with 50mm Guiding Rings\u003c\/h2\u003e\n\u003cp\u003eThe patented William Optics 120mm Saddle Handle Bar is a dual-purpose accessory, combining a secure carry handle and a Mini-Vixen dovetail saddle into a single 120 mm component. This kit arrives with a matched set of 50mm guiding rings, creating a complete mounting solution for your guide scope and an essential upgrade for both portability and autoguiding.\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\u003eA Patented 120mm Carry Handle and Mini-Vixen Saddle\u003c\/h3\u003e\n\u003cp\u003eThis patented design solves two common problems with a single accessory. It functions as a rigid, comfortable handle for safely transporting your optical tube, while the integrated 44 mm wide top surface is a Mini-Vixen style dovetail saddle for mounting guide scopes, finders, or other accessories.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose Engineering:\u003c\/strong\u003e Combines a secure carry handle and a versatile accessory saddle into one CNC-machined unit, increasing rigidity and reducing weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMini-Vixen Compatibility:\u003c\/strong\u003e The 120 mm long saddle accepts any accessory equipped with a standard Vixen-style dovetail bar, secured by two robust locking screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe and Easy Transport:\u003c\/strong\u003e Offers a confident grip for moving your fully-loaded telescope to and from your observing site, minimizing the risk of accidental drops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIncluded 50mm Rings for Autoguiding Setups\u003c\/h3\u003e\n\u003cp\u003eThis kit is purpose-built for imagers, arriving with a matched pair of 50mm guiding rings. These rings mount directly to the handle bar, creating a stable platform for popular 50mm guide scopes. This integrated approach ensures solid alignment and rigidity, eliminating a common source of flexure in autoguiding systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Guiding Package:\u003c\/strong\u003e Includes two 50mm rings with non-marring nylon-tipped thumbscrews, ready for your guide scope right out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlex-Free Connection:\u003c\/strong\u003e Attaching the guide scope directly to the main OTA's handle bar creates a more rigid system than mounting it on a separate dovetail, reducing differential flexure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight and Strong:\u003c\/strong\u003e The entire assembly adds minimal weight to your imaging train while significantly improving its structural integrity and ease of use.\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\"\u003eWill the William Optics 120mm Saddle Handle Bar fit my RedCat 51 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this handle bar is designed as a standard accessory for many William Optics telescopes, including the \u003cstrong\u003eRedCat series\u003c\/strong\u003e. It provides both a carrying handle and a solid mounting point for the included 50mm guide rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a 60mm guide scope with the included rings on the William Optics Handle Bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the rings included in this specific package are designed for a \u003cstrong\u003e50mm diameter guide scope\u003c\/strong\u003e. For larger guide scopes, you would need to purchase separate, larger rings and mount them to the handle's Mini-Vixen saddle if they are attached to a Vixen bar.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat type of dovetail does the saddle on the William Optics 120mm Handle Bar accept?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe top saddle features a \u003cstrong\u003eMini-Vixen style clamp\u003c\/strong\u003e. It is designed to accept accessories that have a standard Vixen-style dovetail bar, such as guide scopes, finderscopes, or other small accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the length of the William Optics Saddle Handle Bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe handle bar has a total length of \u003cstrong\u003e120 mm\u003c\/strong\u003e. Its compact size ensures a rigid connection and makes it an ideal fit for small to medium-sized refractors without adding unnecessary bulk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy separate rings for my 50mm guide scope with this William Optics handle?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is a complete kit. The William Optics 120mm Saddle Handle Bar comes bundled with a pair of \u003cstrong\u003e50mm guiding rings\u003c\/strong\u003e, so you have everything you need to mount a compatible guide scope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this William Optics handle bar improve my imaging setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt improves your setup in two key ways. First, it provides a \u003cstrong\u003esecure handle for transport\u003c\/strong\u003e, reducing the risk of damaging your OTA. Second, it creates a \u003cstrong\u003erigid, integrated platform\u003c\/strong\u003e for your 50mm guide scope, which can reduce differential flexure and lead to tighter, rounder stars in your long-exposure images.\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\u003eLength\u003c\/td\u003e\n\u003ctd\u003e120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Saddle Type\u003c\/td\u003e\n\u003ctd\u003eMini-Vixen\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\"\u003e120mm Saddle Handle Bar\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\"\u003e50mm Guiding Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo downloads are available for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44967241744669,"sku":"WO-M-HC120BL-GR50SL","price":163.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/William-Optics-120mm-Saddle-Handle-Bar-with-50mm-Guiding-Rings-M-HC120BL-GR50SL-1__08953.1596133328.1280.1280.jpg?v=1684339490"},{"product_id":"william-optics-243mm-saddle-handle-bar-with-all-50mm-guiding-rings","title":"William Optics 243mm Saddle Handle Bar with 50mm Guiding Rings","description":"\u003cul\u003e\n\t\u003cli\u003eCompatible with William Optics' slide-base guide rings\u003c\/li\u003e\n\t\u003cli\u003eCan be used to make William Optics telescopes portable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\t\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\t\u003cli class=\"active\"\u003e\n\t\t\u003cp\u003e\n\t\t\tThe William Optics 243mm Saddle Handle Bar with 50mm guiding rings is a sturdy and versatile accessory designed for telescope systems. It provides a secure and comfortable grip for carrying and handling the telescope, while also offering a mounting point for guiding rings and other accessories. The handle bar is precision-made from high-quality materials, ensuring a durable and reliable performance. Its compatibility with William Optics' slide-base guide rings and UniGuide 50mm Slide-Base Guide Scope makes it an ideal addition to any telescope setup.\n\t\t\u003c\/p\u003e\n\t\t\u003cdiv class=\"warning\"\u003e\n\t\t\t\u003cimg alt=\"Disclaimer\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" width=\"25px\"\u003e\n\t\t\t\u003cp\u003e\n\t\t\t\t\u003cb\u003eCompatible with William Optics' slide-base guide rings\u003c\/b\u003e\n\t\t\t\u003c\/p\u003e\n\t\t\u003c\/div\u003e\n\n\t\t\u003cdiv\u003e\n\t\t\t\u003ch3\u003eBenefits and Features\u003c\/h3\u003e\n\t\t\t\u003chr\u003e\n\t\t\t\u003cdiv class=\"two-columns-section\"\u003e\n\t\t\t\t\u003cdiv class=\"text-side-2\"\u003e\n\t\t\t\t\t\u003cp\u003e\n\t\t\t\t\t\tHere are some key benefits and features:\n\t\t\t\t\t\u003c\/p\u003e\n\t\t\t\t\t\u003cul\u003e\n\t\t\t\t\t\t\u003cli\u003eWeight: 405 grams\u003c\/li\u003e\n\t\t\t\t\t\t\u003cli\u003eWidth: 44 mm\u003c\/li\u003e\n\t\t\t\t\t\t\u003cli\u003eCan be used with the William Optics UniGuide 50mm Slide-Base Guide Scope\u003c\/li\u003e\n\t\t\t\t\t\t\u003cli\u003eIncludes two screws for installation\u003c\/li\u003e\n\t\t\t\t\t\t\u003cli\u003eCan be used to make William Optics telescopes portable\u003c\/li\u003e\n\t\t\t\t\t\u003c\/ul\u003e\n\t\t\t\t\u003c\/div\u003e\n\t\t\t\t\u003cdiv class=\"image-side-2\" data-mce-style=\"text-align: start;\" style=\"text-align: start;\"\u003e\n\t\t\t\t\t\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/William-Optics-243mm-Saddle-Handle-Bar-with-All-50mm-Guiding-Rings-M-HC243BL-GR50IISL-1__29391.1596133330.1280.1280.jpg?v=1684339698\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\t\t\t\t\u003c\/div\u003e\n\t\t\t\u003c\/div\u003e\n\t\t\u003c\/div\u003e\n\t\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44967243415837,"sku":"WO-M-HC243BL-GR50IISL","price":203.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/William-Optics-243mm-Saddle-Handle-Bar-with-All-50mm-Guiding-Rings-M-HC243BL-GR50IISL-1__29391.1596133330.1280.1280.jpg?v=1684339698"},{"product_id":"baader-off-axis-guider-for-baader-flipmirror-ii","title":"Baader Off Axis Guider for Baader FlipMirror II","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned exclusively for the Baader FlipMirror II (BFM II)\u003c\/li\u003e\n\u003cli\u003eAttaches directly to the 19 mm bottom port\u003c\/li\u003e\n\u003cli\u003eTunable prism allows for precise guide star centering\u003c\/li\u003e\n\u003cli\u003e17.5 mm prism offset maximizes illumination without vignetting\u003c\/li\u003e\n\u003cli\u003eEnables autoguiding regardless of the flip mirror's position\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\u003eDownloads\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\u003eBaader Off Axis Guider for Baader FlipMirror II\u003c\/h2\u003e\n\u003cp\u003eThe Baader Off Axis Guider for Baader FlipMirror II (BFM-OAG) integrates directly with the BFM II's 19 mm bottom port, using a tunable prism to pick off guide stars independent of the mirror's position. Removing the included 4mm spacer ring sets the prism at a 17.5mm offset from the optical axis, maximizing the illuminated field for your autoguider without causing vignetting on the main sensor.\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 Integration via the 19mm BFM II Port\u003c\/h3\u003e\n\u003cp\u003eThis Off-Axis-Guider is engineered specifically for the Baader FlipMirror II, attaching securely to its 19 mm bottom port. The pick-up prism is positioned permanently below the main mirror, ensuring it is always in the light path. This allows for continuous autoguiding whether you are visually observing with an eyepiece in the top port (mirror down) or imaging with a camera on the rear port (mirror up).\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\u003eTunable Prism and 17.5mm Offset for Maximum Illumination\u003c\/h3\u003e\n\u003cp\u003eThe BFM-OAG features a unique, movable prism that can be adjusted to actively center a guide star on your autoguider's chip—a critical function for precise tracking. With the 4mm spacer ring removed, the prism sits 17.5mm from the optical axis, a distance calculated to provide the largest possible vignetting-free field for the guide camera. If the prism protrudes too far into the light path for your specific setup, the 4mm spacer can be re-inserted, although this will slightly reduce the usable illuminated area of the prism.\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\u003eAchieving Parfocality with 18.5mm DT-4 Extensions\u003c\/h3\u003e\n\u003cp\u003eMaking your guide camera and main camera parfocal is straightforward. For cameras with short backfocus, the resulting image plane is approximately 24mm behind the BFM II's T-2 threads. For systems requiring more distance, such as a DSLR, the Baader DT-4 nosepiece extension (#1905130) adds 18.5mm of length to your 1.25\" autoguider. Using one or two DT-4 extensions provides the flexibility to bring virtually any guide camera into the same focal plane as your primary imaging camera.\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 Baader BFM-OAG attach to the FlipMirror II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader BFM-OAG is designed to connect directly to the \u003cstrong\u003e19 mm nosepiece port\u003c\/strong\u003e located on the bottom of the Baader FlipMirror II diagonal. This provides a secure, dedicated connection point that keeps the guider perfectly aligned with the optical train.\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 4mm spacer ring on the Baader BFM-OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e4mm spacer ring\u003c\/strong\u003e adjusts how far the pick-up prism intrudes into the light path. Removing it sets the prism at the optimal 17.5mm offset for maximum guide field illumination. However, if this causes any obstruction in your specific optical setup, you can re-install the ring to pull the prism back slightly, at the cost of a marginally smaller illuminated area for guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Baader BFM-OAG without a FlipMirror II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this unit is specifically designed to mate with the FlipMirror II's bottom port. To use this OAG with a standard telescope setup, you would need the complete \u003cstrong\u003eBaader Off Axis Guider for RCC (RCC-OAG) #2956950\u003c\/strong\u003e, which includes this prism assembly along with the necessary T-2 adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy guide camera is not parfocal with my main camera using the Baader BFM-OAG. How do I fix this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need to adjust the distance of the guide camera from the OAG body. The easiest way to do this is with spacing rings or dedicated extenders. Baader recommends using one or two \u003cstrong\u003eDT-4 nosepiece extensions (#1905130)\u003c\/strong\u003e, which thread into the 1.25\" filter threads of your guide camera to push it further out until it reaches the same focal plane as your main imager.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging Jupiter with a planetary camera on my FlipMirror II's top port. Can I still guide with the Baader BFM-OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The BFM-OAG prism is located in the body of the FlipMirror II, below the mirror itself. This means it picks off guide stars from the incoming light path \u003cstrong\u003ebefore\u003c\/strong\u003e the light hits the flip mirror. As a result, the OAG functions perfectly whether the mirror is down (sending light to the top port) or up (sending light to the rear port).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen using the Baader BFM-OAG with my SCT and a DSLR, where should the prism be positioned?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor the best results with a rectangular sensor like that in a DSLR, the FlipMirror II body should be oriented so the OAG prism sits \u003cstrong\u003eunder the long side of the camera sensor\u003c\/strong\u003e. This placement allows the prism to find guide stars in the largest available off-axis field of view without risk of intruding into the corners of your main image frame.\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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eBaader FlipMirror II (BFM II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection to BFM II\u003c\/td\u003e\n\u003ctd\u003e19 mm Nosepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Offset from Optical Axis\u003c\/td\u003e\n\u003ctd\u003e17.5 mm (with 4mm spacer removed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemovable Spacer Ring\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.07\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eGuider\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e43mm + 3.5mm Extension tube (requires 24mm Back focus on BFM II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eø 1¼\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrisms Width\u003c\/td\u003e\n\u003ctd\u003e9.5 mm\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\"\u003eOff Axis Guider for Baader FlipMirror II\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\"\u003e4mm Spacer Ring\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967300727069,"sku":"BAA-2956951","price":178.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Baader-Off-Axis-Guider-for-Baader-FlipMirror-II-1__74182.1597110541.1280.1280.jpg?v=1684340034"},{"product_id":"baader-guide-scope-rings-bp-i-60-120mm","title":"Baader Guide Scope Rings BP I - 60-120mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAccommodates Tube Diameters: 60mm to 120mm\u003c\/li\u003e\n\u003cli\u003eRing Width: 28mm\u003c\/li\u003e\n\u003cli\u003eAdjustment Screws: Three M10 with Non-Rotating Ball-Bearing Tips\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid Turned Aluminum\u003c\/li\u003e\n\u003cli\u003eAccessory Ports: Four ¼\" Threaded Mounting Points\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\u003eDownloads\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\u003eBaader Guide Scope Rings BP I - 60-120mm\u003c\/h2\u003e\n\u003cp\u003eThe Baader Guide Scope Rings BP I provide a rigid, non-slip mounting solution for guide scopes with tube diameters from 60mm to 120mm. Each 28mm wide ring is machined from solid aluminum and features three oversized M10 adjustment screws with 10mm diameter, non-rotating, ball-bearing tips for precise, scratch-free alignment. Mounting is handled by a central ¼\" photo thread and two 5mm through-holes, while four additional ¼\" threaded surfaces allow for secure attachment of 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\u003eRock-Solid Support for Guide Scopes from 60mm to 120mm\u003c\/h3\u003e\n\u003cp\u003eMachined from solid, turned aluminum, these 28mm wide rings provide a massive, stable platform that eliminates flexure in your guiding setup. The wide contact surface and robust build are designed to securely hold guide scopes ranging from compact 60mm models to larger 120mm refractors, ensuring your autoguiding remains precise throughout a long imaging session.\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\u003eM10 Adjustment Screws: Precision Pointing Without Tube Damage\u003c\/h3\u003e\n\u003cp\u003eThe core of the BP I design is its advanced adjustment system. Three large M10 screws on each ring allow for fine, deliberate alignment of the guide scope. Crucially, each 10mm diameter screw tip features an internal ball-bearing surface made of V2A steel, which prevents the hard rubber contact pad from rotating as you tighten it. This eliminates the torsional stress and paint marring common with simpler nylon-tipped screws, keeping your guide scope held firmly without risk of scratches or slippage.\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\u003eIntegrated Accessory Mounting: 4 Additional 1\/4\" Threaded Ports\u003c\/h3\u003e\n\u003cp\u003eBeyond their primary function, the BP I rings serve as a versatile mounting hub. Each ring features four milled planar surfaces on its outer diameter, each equipped with a standard ¼\" photo-threaded hole. This allows you to piggyback additional accessories directly onto the rings, such as a finderscope, a WiFi adapter, or cable management hardware, creating a clean and integrated imaging train.\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\u003eBaader BP I vs. Standard Rings: The Advantage of Non-Rotating Tips\u003c\/h3\u003e\n\u003cp\u003eWhile many guide rings use a simple bolt with a fixed nylon tip, the Baader BP I rings incorporate a superior mechanical design. The difference is most apparent during final adjustments.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Rings:\u003c\/strong\u003e As you tighten a standard screw, the tip twists against the telescope tube. This can cause the guide scope to \"walk\" out of position, mar the paint finish over time, and apply uneven, slipping pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader BP I Rings:\u003c\/strong\u003e The ball-bearing mechanism isolates the rotational force. Only pure linear pressure is applied to the guide scope, resulting in an absolutely solid, non-slip grip that holds alignment perfectly and protects your equipment's finish.\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 Baader BP I rings better than cheaper guide scope rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of the Baader BP I rings is the \u003cstrong\u003enon-rotating, ball-bearing tips\u003c\/strong\u003e on the M10 adjustment screws. This design prevents the guide scope from shifting or being scratched during tightening, a common issue with simpler rings that use basic nylon-tipped screws. The solid aluminum construction and 28mm width also provide superior rigidity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I mount the Baader BP I rings on any dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The base of each ring has a central \u003cstrong\u003e¼\" photo-threaded hole\u003c\/strong\u003e and two additional \u003cstrong\u003e5mm through-holes\u003c\/strong\u003e. This combination allows you to securely bolt them to virtually any dovetail plate or mounting bar that accepts standard ¼\"-20 or M5 hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the adjustment screws on the Baader BP I rings scratch my guide scope's finish?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The screw tips are covered with a hard rubber sheath and, more importantly, they do not rotate when tightened. This \u003cstrong\u003enon-rotating design\u003c\/strong\u003e ensures that the tip presses straight onto the tube without any twisting or scraping motion, protecting your telescope's paint and finish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the maximum diameter scope I can use with the Baader BP I rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader BP I rings are designed for tube diameters ranging from \u003cstrong\u003e60mm up to 120mm\u003c\/strong\u003e. The long M10 adjustment screws provide ample travel to accommodate any telescope within this range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I use the four extra threaded holes on the Baader BP I rings for a finder scope like the SkySurfer III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe four milled surfaces with ¼\" threads are ideal for piggybacking accessories. To mount a Baader SkySurfer III or similar finder, you would attach the finder's mounting shoe or stalk to one of the threaded holes using a standard ¼\"-20 bolt. This creates a solid, integrated pointing system directly on your guide scope assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the Baader BP I rings suitable for holding a small, wide-field refractor like a 70mm f\/5 for piggyback imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While designed for guiding, the massive, 28mm wide construction of the Baader BP I rings makes them exceptionally rigid and perfectly capable of holding a small imaging refractor. A 70mm scope fits comfortably within the 60-120mm range, and the rings' stability will prevent flexure during imaging.\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\u003eSupported Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e60mm - 120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Material\u003c\/td\u003e\n\u003ctd\u003eSolid Turned Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Screws\u003c\/td\u003e\n\u003ctd\u003e3x M10 per ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Design\u003c\/td\u003e\n\u003ctd\u003eBall-bearing with hard rubber sheath (non-rotating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Diameter\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Material\u003c\/td\u003e\n\u003ctd\u003eV2A Steel (ball bearing surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Mounting\u003c\/td\u003e\n\u003ctd\u003e1x ¼\" photo thread, 2x 5mm through-holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Mounting\u003c\/td\u003e\n\u003ctd\u003e4x ¼\" photo threads on milled surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 rings per set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.76\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eball bearing tips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003e6x large handknobs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eAll Telescopes in given Tube sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameters\u003c\/td\u003e\n\u003ctd\u003e60 – 120 mm\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\"\u003eBaader Guide Scope Rings BP I (Set of 2)\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967373177117,"sku":"BAA-1500201","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Guide-Scope-Rings-BP-I-60-120mm-1__80408.1597111060.1280.1280.jpg?v=1684341585"},{"product_id":"baader-guide-scope-rings-bp-ii-110-160mm","title":"Baader Guide Scope Rings BP II - 110-160mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAccommodates Tube Diameters from 110mm to 160mm\u003c\/li\u003e\n\u003cli\u003eMassive 28mm Ring Width for High Rigidity\u003c\/li\u003e\n\u003cli\u003eThree M10 Adjustment Screws Per Ring\u003c\/li\u003e\n\u003cli\u003e10mm Non-Rotating, Ball-Bearing Steel Tips\u003c\/li\u003e\n\u003cli\u003eBase Mounting via ¼\" Thread or 5mm Holes\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\u003eBaader Guide Scope Rings BP II - 110-160mm\u003c\/h2\u003e\n\u003cp\u003eThis pair of Baader Guide Scope Rings BP II securely holds optical tubes from 110mm to 160mm in diameter, utilizing a massive 28mm wide turned aluminum construction for absolute rigidity against flexure. Each ring features three M10 adjustment screws with large knobs, terminating in 10mm diameter, non-rotating, ball-bearing tips made from V2A steel to prevent slipping or scratching your guide scope. Mounting is handled by a central ¼\" photo thread and two 5mm through-holes, while four additional photo-threaded holes on the outer diameter allow for flexible accessory attachment.\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\u003eSecure Mounting for Tubes from 110mm to 160mm\u003c\/h3\u003e\n\u003cp\u003eEngineered from solid, turned aluminum, these Baader rings provide a mechanically stable platform for guide scopes and secondary instruments with tube diameters between 110mm and 160mm. The substantial 28mm width of each ring creates a broad contact area, distributing the load and minimizing mechanical flexure—a critical factor for maintaining precise guiding accuracy over long exposures.\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\u003eNon-Rotating 10mm Ball-Bearing Tips: Precision Without Scratches\u003c\/h3\u003e\n\u003cp\u003eThe standout feature of the BP II rings is the design of the three M10 adjustment screws. Each screw is tipped with a 10mm V2A steel surface that makes contact with the guide scope. Thanks to an internal ball-bearing mechanism, this tip does not rotate as you tighten the screw, eliminating the risk of twisting the guide scope out of alignment or marring its finish. A hard rubber sheath provides a non-slip grip that holds your instrument securely without causing damage.\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\u003eVersatile Mounting: ¼\" Threads and 5mm Through-Holes\u003c\/h3\u003e\n\u003cp\u003eBaader ensures broad compatibility by incorporating multiple mounting options. The base of each ring has a central ¼\" photo-threaded hole for direct attachment to dovetail bars and saddles, flanked by two 5mm through-holes for custom bolt-on solutions. Additionally, four milled planar surfaces on the outer diameter of each ring feature their own photo-threaded holes, allowing you to piggyback accessories like a finder scope or control box directly onto the ring system.\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\u003eBaader BP II Rings vs. Standard Guide Rings: A Mechanical Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile standard guide rings with simple nylon-tipped screws may be sufficient for smaller guide scopes, they introduce potential sources of error. The Baader BP II rings are an engineering solution to common guiding problems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotational Shift:\u003c\/strong\u003e Standard screws can twist the guide scope as they are tightened, slightly altering alignment. The BP II's non-rotating, ball-bearing tips prevent this entirely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Flexure:\u003c\/strong\u003e The massive 28mm width and solid aluminum build of the BP II rings provide superior rigidity compared to narrower, less substantial rings, which can flex under the weight of a heavier instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Grip:\u003c\/strong\u003e The V2A steel and rubber tips offer a more positive, non-slip grip than simple nylon screws, ensuring your guide scope does not shift during a long imaging session.\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\"\u003eHow do the Baader BP II Guide Scope Rings prevent scratching my telescope tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader BP II rings use a unique adjustment screw design. The \u003cstrong\u003e10mm V2A steel tips\u003c\/strong\u003e are covered with a hard rubber sheath, providing a firm but non-marring contact surface. Critically, the tips are mounted on a \u003cstrong\u003eball-bearing system\u003c\/strong\u003e, so they do not rotate as you tighten them, preventing any grinding or twisting motion against the telescope's finish.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the non-rotating tips on the Baader BP II adjustment screws?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is precision. When a standard screw tip rotates against a tube, it can cause the tube to shift or twist slightly, throwing off your guide star alignment. The non-rotating design of the Baader BP II rings ensures that the only motion is linear, pressing the scope securely into place without altering its pointing direction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the mounting options on the base of the Baader Guide Scope Rings BP II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEach ring offers two primary mounting methods on its base: a central \u003cstrong\u003e¼\" standard photo thread\u003c\/strong\u003e for easy attachment to most astronomical dovetail bars, and \u003cstrong\u003etwo 5mm diameter through-holes\u003c\/strong\u003e for a more permanent, custom-bolted connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I mount other accessories onto the Baader BP II rings themselves?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Each ring has \u003cstrong\u003efour milled planar surfaces\u003c\/strong\u003e on its outer circumference, and each surface is equipped with a standard photo-threaded hole. This allows you to attach additional accessories like finder scopes, laser pointers, or small control units directly to the rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI plan to use a 6\" f\/4 Newtonian (approx. 150mm tube diameter) as a wide-field astrograph piggybacked on my main telescope. Are the Baader BP II rings rigid enough for this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The 110-160mm range of the Baader BP II rings is perfect for a 150mm tube. Their massive \u003cstrong\u003e28mm width\u003c\/strong\u003e and solid aluminum construction are specifically designed to prevent flexure, making them an ideal choice for securely mounting a relatively heavy instrument like a 6\" Newtonian for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the Baader BP II Guide Scope Rings to a standard Vixen or Losmandy dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe easiest method is to use the central ¼\" threaded hole on the bottom of each ring. You will need two ¼\"-20 screws of appropriate length to thread up from the bottom of your dovetail bar into the base of the rings. This provides a secure and standard connection.\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\u003eCompatible Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e110mm - 160mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Width\u003c\/td\u003e\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing Material\u003c\/td\u003e\n\u003ctd\u003eTurned Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Screws\u003c\/td\u003e\n\u003ctd\u003e3x M10 per ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Diameter\u003c\/td\u003e\n\u003ctd\u003e10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Design\u003c\/td\u003e\n\u003ctd\u003eBall-bearing, non-rotating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Tip Material\u003c\/td\u003e\n\u003ctd\u003eV2A Steel with rubber sheath\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase Mounting\u003c\/td\u003e\n\u003ctd\u003e1x ¼\" photo thread, 2x 5mm through-holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Mounting\u003c\/td\u003e\n\u003ctd\u003e4x ¼\" photo threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 rings per set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e1.03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Features\u003c\/td\u003e\n\u003ctd\u003eball bearing tips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Type\u003c\/td\u003e\n\u003ctd\u003e6x large handknobs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eAll Telescopes in given Tube sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameters\u003c\/td\u003e\n\u003ctd\u003e110 – 160 mm\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\"\u003eBaader Guide Scope Rings BP II (110-160mm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967373209885,"sku":"BAA-1500202","price":271.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Guide-Scope-Rings-BP-II-110-160mm-1__75978.1597111062.1280.1280.jpg?v=1684341595"},{"product_id":"baader-off-axis-guider-for-rcc-coma-corrector","title":"Baader Off-Axis Guider for RCC Coma Corrector","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTunable pick-off prism for guide star centering\u003c\/li\u003e\n\u003cli\u003eDesigned for the Baader RCC Newtonian Coma Corrector\u003c\/li\u003e\n\u003cli\u003eAccepts standard 1 1\/4\" guide cameras and eyepieces\u003c\/li\u003e\n\u003cli\u003eEliminates differential flexure from separate guidescopes\u003c\/li\u003e\n\u003cli\u003eMaintains a rigid, co-axial optical train\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\u003eDownloads\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\u003eBaader Off-Axis Guider for RCC Coma Corrector\u003c\/h2\u003e\n\u003cp\u003eThe Baader Off-Axis Guider for the RCC Coma Corrector is the only OAG designed for this system with a fully tunable pick-off prism, allowing you to precisely center a guide star on your sensor using a standard 1 1\/4\" eyepiece holder without ever rotating your camera.\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\u003ePrecision Guiding: The Tunable Pick-Off Prism\u003c\/h3\u003e\n\u003cp\u003eThe core challenge of any off-axis guider is finding a suitable guide star in the corrected field. This Baader OAG solves the problem with an adjustable pick-off prism. Instead of being forced to rotate your entire imaging assembly to hunt for a star, you can tune the prism's position independently, actively centering a guide star on your autoguider's chip. This capability dramatically speeds up your setup time and ensures you can guide on the best possible star in the field.\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\u003eDesigned Exclusively for the Baader RCC Coma Corrector\u003c\/h3\u003e\n\u003cp\u003eThis off-axis guider is not a universal-fit accessory; it is engineered specifically to integrate with the Baader Rowe Coma Corrector (RCC). This ensures correct spacing, a rigid connection, and optimal placement of the pick-off prism within the RCC's corrected light cone. The result is a solid, flexure-free guiding solution that becomes a seamless part of your Newtonian imaging train, preserving the optical corrections of the RCC for both your main camera and your guider.\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\u003eBaader RCC OAG vs. Fixed-Prism Designs: The Advantage of Adjustment\u003c\/h3\u003e\n\u003cp\u003eMany off-axis guiders use a fixed-stalk or helical-only focusing mechanism, which limits your guide star selection to a narrow annulus at the edge of the field. The Baader RCC OAG provides a distinct advantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed-Prism OAGs:\u003c\/strong\u003e These often force a compromise. If no bright star falls exactly where the prism sits, you must rotate the entire camera and OAG, ruining your framing. You are often left with a faint, suboptimal guide star.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaader's Tunable Prism:\u003c\/strong\u003e This design lets you decouple framing from guide star selection. Once your main camera is framed on the target, you can move the prism to find and center the brightest, most stable guide star available. This leads to tighter guiding, sharper main images, and less time wasted in the field.\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 Baader RCC Off-Axis Guider's prism unique?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts key feature is the \u003cstrong\u003etunable pick-off prism\u003c\/strong\u003e. Unlike fixed-prism OAGs, this design allows you to adjust the prism's position to actively find and center a suitable guide star on your autoguider's sensor without rotating your primary camera, which saves significant setup time and improves guiding accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size guide camera does the Baader RCC OAG accept?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Baader RCC Off-Axis Guider is equipped with a standard \u003cstrong\u003e1 1\/4\" eyepiece holder\u003c\/strong\u003e. This allows it to accept any autoguider or guiding eyepiece with a 1.25\" nosepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader RCC OAG compatible with other coma correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this Off-Axis Guider is specifically designed for a seamless mechanical and optical fit with the \u003cstrong\u003eBaader Planetarium RCC (Rowe Coma Corrector)\u003c\/strong\u003e for Newtonian telescopes. Its spacing and threading are optimized for that specific corrector and it is not intended for universal use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use the Baader RCC OAG instead of a separate guidescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn off-axis guider uses the same light path as your main imaging camera, which completely eliminates the problem of \u003cstrong\u003edifferential flexure\u003c\/strong\u003e. This is where the main telescope and a separate guidescope physically shift slightly relative to each other, causing guiding errors and elongated stars. The RCC OAG ensures your guiding is based on the exact same motion your main sensor sees.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Baader RCC OAG a good choice for an 8\" f\/4 Newtonian astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. An 8\" f\/4 astrograph is precisely the type of instrument the Baader RCC Coma Corrector is designed for. Pairing it with this dedicated OAG creates a rigid, high-performance imaging train that corrects for coma while providing the most accurate guiding possible by eliminating guidescope flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Baader RCC OAG help when imaging a target like the galaxy cluster Abell 2151 where guide stars are sparse?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn star-poor regions like the field around the Hercules Cluster (Abell 2151), a fixed-prism OAG might not find any usable guide star at all. The \u003cstrong\u003etunable prism\u003c\/strong\u003e of the Baader RCC OAG allows you to scan a much wider area for a potential guide star after you've framed your target. This significantly increases your chances of finding a star bright enough for reliable guiding, a task that would be nearly impossible with a fixed-prism design.\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\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size (in)\u003c\/td\u003e\n\u003ctd\u003e1¼\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eGuider\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical length (mm)\u003c\/td\u003e\n\u003ctd\u003e36.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Connection (eyepiece\/-camera-sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Connection (lens sided)\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePivoting Range\u003c\/td\u003e\n\u003ctd\u003e140°\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44967374192925,"sku":"BAA-2956950","price":244.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Baader-Off-Axis-Guider-for-RCC-Coma-Corrector-1__73343.1597111085.1280.1280.jpg?v=1684341652"},{"product_id":"zwo-oag-l","title":"ZWO OAG-L","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLarge 12mm x 12mm prism for brighter guide stars\u003c\/li\u003e\n\u003cli\u003eM68, M54, and M48 connection options\u003c\/li\u003e\n\u003cli\u003e17.5mm thickness preserves 55mm backfocus\u003c\/li\u003e\n\u003cli\u003eDesigned for ZWO ASI Mini guide cameras\u003c\/li\u003e\n\u003cli\u003eSupports full-frame and APS-C imaging sensors\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\u003eDownloads\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\u003eZWO M68 Large Off-Axis Guider (OAG-L)\u003c\/h2\u003e\n\u003cp\u003eThe ZWO OAG-L M68 Off-Axis Guider uses a large 12mm x 12mm prism to intercept more light, improving guiding accuracy for full-frame and APS-C sensors. Its rigid, 17.5mm body maintains the standard 55mm backfocus distance in your imaging train, while the included 5mm thick tilt plate uses M48 threads for a secure connection to your corrector or flattener.\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\u003eLarge 12mm x 12mm Prism for Brighter Guide Stars\u003c\/h3\u003e\n\u003cp\u003eThe core of the OAG-L is its oversized 12mm x 12mm prism, which provides a significantly larger surface area to send light to your guide camera. This design delivers a bright, clear view of potential guide stars, even in sparse star fields. With an effective light-passing aperture of 11.7mm x 8.3mm, you can use fainter stars for guiding, resulting in more consistent tracking and sharper final images.\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\u003eRigid, 17.5mm Profile for Full-Frame Stability\u003c\/h3\u003e\n\u003cp\u003eEngineered for modern imaging trains, the OAG-L adds only 17.5mm of backfocus, making it easy to integrate while maintaining the critical 55mm spacing required by most correctors. ZWO removed internal threads in favor of a direct, bolt-on connection between the OAG, filter wheel, and camera, creating a solid, flexure-free imaging stack. This rigidity is critical when using full-frame sensors like the ASI6200, ensuring no tilt or sag ruins long exposures.\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\u003eZWO OAG-L vs. Previous M68 OAG\u003c\/h3\u003e\n\u003cp\u003eThe primary advantage of the OAG-L is its larger 12mm x 12mm prism. This upgrade allows it to gather significantly more light than the previous generation M68 OAG, directly improving the signal-to-noise ratio at the guide camera. This makes finding and locking onto guide stars easier and more reliable, especially with longer focal length telescopes where the field of view is narrow.\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\u003eHelical Focuser for ZWO ASI Mini Cameras\u003c\/h3\u003e\n\u003cp\u003eThis off-axis guider is specifically designed for ZWO's ASI Mini guide cameras, such as the ASI174MM Mini or ASI220MM Mini. A precise helical focuser allows you to perfectly match the focus of your guide camera to your main imaging camera. Once you achieve focus during the day on a distant object, you can lock it down, ensuring both your main camera and guider reach focus simultaneously under the stars.\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\"\u003eWhich guide cameras are compatible with the ZWO OAG-L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ZWO OAG-L is compatible only with guide cameras that have a 1.25\" barrel body, such as the ZWO ASI Mini series. This includes popular models like the \u003cstrong\u003eASI174MM Mini\u003c\/strong\u003e, \u003cstrong\u003eASI220MM Mini\u003c\/strong\u003e, and \u003cstrong\u003eASI120MM Mini\u003c\/strong\u003e. Other cameras will not reach focus on the guider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the ZWO OAG-L cause vignetting with my full-frame camera like the ASI6200?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The ZWO OAG-L is designed with a large clear aperture to fully support full-frame sensors without vignetting, provided the prism is positioned correctly. For full-frame cameras like the ASI6200 or ASI2600, you should position the prism so it does not physically obstruct the main imaging sensor's light path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the OAG-L improve guiding over a separate guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn off-axis guider eliminates differential flexure, which is the tiny amount of mechanical sag or bending that occurs between a main telescope and a separate guide scope. By using the same light path for both imaging and guiding, the OAG-L ensures the guide camera sees the exact same movement the main camera does, leading to more accurate guiding corrections and sharper stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the backfocus consumption of the ZWO OAG-L?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main body of the ZWO OAG-L consumes \u003cstrong\u003e17.5mm\u003c\/strong\u003e of backfocus. This allows it to fit comfortably within the standard 55mm backfocus distance when paired with a ZWO filter wheel 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 the ZWO OAG-L to my telescope and camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ZWO OAG-L bolts directly to a ZWO 2\" or 36mm filter wheel, which then bolts to the camera. On the telescope side, it includes an M48 tilt adapter for connecting to most field flatteners or correctors. Optional M54 and M68 tilt adapters are also available for different thread standards.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ZWO OAG-L a good choice for a fast Newtonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but with a consideration. In very fast optical systems (f\/4 or faster), the OAG's prism can cast a slight shadow on the main imaging sensor if it's lowered too far into the light path. You must find the optimal balance between prism height for bright guide stars and minimizing any potential obstruction of the main sensor.\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\u003eSKU Number\u003c\/td\u003e\n\u003ctd\u003eZWO-OAG-L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eZWO OAG-L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.58 lb (265 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eZWO - 2 Years\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\"\u003eM68 Large Off-Axis Guider\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\"\u003eM48 Sensor Tilt Plate (5mm)\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44967442088221,"sku":"ZWO-OAG-L","price":279.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ZWO-OAG-L-1__61693.1648571086.1280.1280.jpg?v=1684342019"},{"product_id":"zwo-oag","title":"ZWO OAG","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEliminates Differential Flexure\u003c\/li\u003e\n\u003cli\u003eReduces Overall System Weight\u003c\/li\u003e\n\u003cli\u003eIncludes 1.25\" Guide Camera Holder\u003c\/li\u003e\n\u003cli\u003e5mm T2 Extender for Spacing Adjustment\u003c\/li\u003e\n\u003cli\u003eM42 and M48 Adapters Included\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\u003eDownloads\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\u003eZWO OAG Off-Axis Guider\u003c\/h2\u003e\n\u003cp\u003eThe ZWO OAG integrates guiding directly into your main optical path using an included 1.25” holder for your guide camera. It ships with a 5mm T2 extender and multiple adapters to solve critical spacing and connection challenges, effectively eliminating the differential flexure that can plague separate guidescope setups.\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\u003eEnd Differential Flexure with a 1.25\" Integrated Guider\u003c\/h3\u003e\n\u003cp\u003eThe ZWO OAG solves the most persistent problem in long-exposure astrophotography: differential flexure. By using a prism to pick off a small portion of the light from your main telescope's imaging cone, it ensures your guide camera and imaging camera see the exact same minute movements. Any tube flexure, mirror flop, or mount shift is seen by both cameras simultaneously, resulting in perfectly round stars even at long focal lengths.\u003c\/p\u003e\n\u003cp\u003eThis design makes a separate, heavy guidescope unnecessary, reducing the overall weight and complexity of your rig. The OAG includes a standard 1.25” holder, making it compatible with a wide range of popular autoguiding cameras.\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\u003eFine-Tune Focus with the Included 5mm T2 Extender\u003c\/h3\u003e\n\u003cp\u003eAchieving simultaneous focus between your main imager and guide camera is critical. The ZWO OAG kit includes a versatile set of adapters to manage the precise spacing required. The package contains M42 and M48 adapters for direct connection to most ZWO cameras, filter wheels, and telescope focusers. \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5mm T2 Extender:\u003c\/strong\u003e This crucial spacer helps adjust the distance between the OAG and your main camera, providing the mechanical back focus needed to bring the guide camera into focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapter Suite:\u003c\/strong\u003e With included M42, M48, and M48-M42 adapters, you have the flexibility to connect to nearly any imaging train configuration right out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eZWO OAG vs. Traditional 50mm Guidescopes\u003c\/h3\u003e\n\u003cp\u003eWhile a 50mm guidescope offers a wider field of view for finding a guide star, the OAG provides superior guiding accuracy where it matters most.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero Flexure:\u003c\/strong\u003e The ZWO OAG physically eliminates differential flexure, a mechanical problem that guiding software cannot correct. This is the single largest source of elongated stars in systems using a separate guidescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Weight and Better Balance:\u003c\/strong\u003e By removing the guidescope, mounting rings, and dovetail bar, you reduce the payload on your mount. This improves tracking and allows the mount to perform more efficiently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Focal Length Precision:\u003c\/strong\u003e For Schmidt-Cassegrains and Ritchey-Chrétiens, the OAG guides at the same image scale as your main camera. This allows for far more precise corrections than a short focal length guidescope can deliver, leading to fundamentally sharper images.\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\"\u003eWhy should I use the ZWO OAG instead of a guidescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary reason is to \u003cstrong\u003eeliminate differential flexure\u003c\/strong\u003e. This is any small mechanical shift between your main telescope and your guidescope that causes trailing stars, even with perfect guiding. The ZWO OAG uses one optical path for both cameras, making this problem impossible. It also reduces the weight and complexity of your setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the ZWO OAG work with my Celestron EdgeHD 8\" and an ASI533MC Pro camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an excellent combination. Long focal length systems like the EdgeHD 8\" are the most susceptible to differential flexure, making the ZWO OAG the ideal guiding solution. The included M42 and M48 adapters will allow you to connect the OAG to your camera and the telescope's reducer or focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the guide camera with the ZWO OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFirst, achieve sharp focus with your main imaging camera. Then, loosen the thumbscrew on the 1.25\" holder and slide your guide camera up or down until the stars in your guiding software are also sharp. The goal is to make the distance from the prism to the guide sensor equal to the distance from the prism to the main imaging sensor. The included 5mm T2 extender can be used to adjust the main camera's position to help achieve this.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm imaging the Pelican Nebula (IC 5070). Will I have trouble finding a guide star?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Pelican Nebula is in a dense region of the Milky Way, so finding a guide star with the ZWO OAG should be straightforward. The main trade-off of an OAG is a smaller field of view for finding stars compared to a guidescope. In star-poor regions, you may need to rotate your camera to place a suitable guide star onto the prism, but for most deep-sky targets, this is not an issue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapters come included with the ZWO OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ZWO OAG comes with a comprehensive set of adapters to fit most imaging trains. Included are an \u003cstrong\u003eM48 adapter\u003c\/strong\u003e for 2\" filter threads, an \u003cstrong\u003eM42 adapter\u003c\/strong\u003e for T-threads, and an \u003cstrong\u003eM48-M42 adapter\u003c\/strong\u003e ring for additional flexibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a non-ZWO guide camera with this OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The ZWO OAG includes a standard \u003cstrong\u003e1.25” holder\u003c\/strong\u003e. Any guide camera with a 1.25\" nosepiece form factor will fit and can be used for autoguiding.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eZWO-OAG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 Years\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\"\u003eZWO OAG 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\"\u003e1.25” Holder\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\"\u003e5mm T2 Extender\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\"\u003eM42 Adapter\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\"\u003eM48 Adapter\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\"\u003eM48-M42 Adapter\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\"\u003eHexagon Wrench\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44967445561629,"sku":"ZWO-OAG","price":179.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ZWO-OAG-1__40053.1642537735.1280.1280.jpg?v=1684342114"},{"product_id":"apm-50mm-image-master-guide-scope","title":"APM 50mm Image Master Guide Scope","description":"\u003c!-- more --\u003e\u003cb\u003eAPM Image Master Mini Guiding Scope 50 mm - Deluxe Finder Scope\u003cbr\u003e\u003cbr\u003e\u003c\/b\u003e\u003ci\u003eThe compact lightweight mini Telescope - perfect for guiding, searching or spotting\u003cbr\u003e\u003c\/i\u003e\u003cbr\u003eThis small telescope is specially made as guiding telescope for Autoguiding but it´s also perfect as a finder or little richfield telescope.\u003cbr\u003eTogether with the M-Gen the Image Master becomes an autoguider. A crosshair eyepiece makes it to a perfect finder scope and with an eyepiece it becomes a small telescope. M-Gen, crosshair eyepiece, and eyepieces are not included.\u003cbr\u003e\u003cbr\u003eThe focuser is a precise helical type with a millimeter scale and 8 mm focusing travel. The backfocus is 21 mm max.\u003cbr\u003e\u003ci\u003e\u003cbr\u003e\u003c\/i\u003e\u003cul\u003e\n\u003cli\u003ePrecise helical focuser\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eT2 thread\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLocking screw at focuser\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGuiding cradle rings with dovetail\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFor all 1.25\" eyepieces (straight)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eDelivery contents\u003c\/b\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eMini Telescope\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTuberings\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDovetail Rail\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eType of telescope:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAchromat Refractor\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLens:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAchromat\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eColor:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eblack\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube material:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eAperture:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e50 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal ratio:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003ef\/4.1\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e205 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCoating:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eMulticoated\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eMax. useful visual power:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e100 x\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eBackfokus:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e21 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocuser:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eHelical Focuser with 8 mm Travel\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eConnection to eyepiece:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1.25\" and T2\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eIncluded accessories:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eTuberings and Dovetail Rail\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTotal weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eca. 1.1 lb\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967662485789,"sku":"APM-50-GUIDE","price":206.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/APM-50mm-Image-Master-Guide-Scope-1__52831.1648151833.1280.1280.jpg?v=1684345417"},{"product_id":"apm-60mm-image-master-guide-scope","title":"APM 60mm Image Master Guide Scope","description":"\u003c!-- more --\u003e\u003cb\u003eAPM Mini Guiding Scope 60 mm - Deluxe Finder Scope\u003cbr\u003e\u003cbr\u003e\u003c\/b\u003e\u003ci\u003eThe compact lightweight mini Telescope - perfect for guiding, searching or spotting\u003c\/i\u003e\u003ci\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/i\u003e\u003cbr\u003eThis small telescope is specially made as guiding telescope for Autoguiding e.g. the M-Gen, but it´s also perfect as a finder or little richfield telescope.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eThe focuser is a precise helical type with a millimeter scale and 8 mm focusing travel. The backfocus is 20 mm max.\u003cbr\u003e\u003ci\u003e\u003cbr\u003e\u003c\/i\u003e\u003cul\u003e\n\u003cli\u003ePrecise helical focuser\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eT2 thread\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLocking screw at focuser\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGuiding cradle rings with dovetail\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFor all 1.25\" eyepieces (straight)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eType of telescope:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAchromat Refractor\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLens:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAchromat\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eColor:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eblack \/ white\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube material:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eAluminium\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eAperture:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e60 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal ratio:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003ef\/4\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocal length:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e240 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eCoating:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eMulticoated\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eBackfokus:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e20 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eFocuser:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eHelical Focuser with 8 mm Travel\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eConnection to eyepiece:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e1.25\"\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTube diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e63 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eLength during observing:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e252 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eDewcap diameter:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e72 mm\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eIncluded accessories:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eTuberings and Dovetail Rail\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cb\u003eTotal weight:\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003eca. 1.2 lb\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"APM","offers":[{"title":"Default Title","offer_id":44967662715165,"sku":"APM-60-GUIDE","price":258.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/APM-60mm-Image-Master-Guide-Scope-1__38798.1600124035.1280.1280.jpg?v=1684345425"},{"product_id":"sbig-oag-8300-off-axis-guider","title":"SBIG OAG-8300  Off Axis Guider","description":"\u003c!-- more --\u003e#N\/A","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967710490909,"sku":"DL-OAG-8300","price":863.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"sbig-ao-8-adaptative-optics","title":"SBIG AO-8 Adaptative Optics","description":"\u003c!-- more --\u003e\u003cdiv\u003eAdaptive Optics unit for Aluma and STF cameras\u003cp\u003eThe AO-8A works with the STF and Aluma series cameras.\u003c\/p\u003e\n\u003cp\u003eThe AO-8A requires an off-axis guide camera behind the device.  For Aluma cameras this requires either a \u003ca href=\"https:\/\/diffractionlimited.com\/product\/sc-2\/\"\u003eStarChaser SC-2\u003c\/a\u003e or a \u003ca href=\"https:\/\/diffractionlimited.com\/product\/sttstxlstx-remote-guide-head\/\"\u003eRemote Guide Head\u003c\/a\u003e used with a custom Off-Axis Guider.  All STF cameras are supported via the StarChaser SC-2 (except STF-402 due to different mounting interface). Also works with older self-guided Aluma wheels.\u003c\/p\u003e\n\u003ch3\u003eAO Results\u003c\/h3\u003e\n\u003cp\u003eThe images below are actual star images showing the effect of image wander corrected at 1 Hz and 10 Hz:\u003c\/p\u003e\n\u003cp\u003e1 Hz Corrections\u003c\/p\u003e\n\u003cp\u003e10 Hz Corrections\u003c\/p\u003e\n\u003cp\u003eAnd the resulting size of the star image in a long exposure:\u003c\/p\u003e\n\u003cp\u003e1 Hz Corrections\u003c\/p\u003e\n\u003cp\u003e10 Hz Corrections\u003c\/p\u003e\n\u003cp\u003eOther data gathered by Brad Wallis of JPL (Brad Wallis and Benoit Schillings developed the prototype for the original AO-7) show the the effect of rapid corrections on poor seeing.  At 1 Hz the larger, slower component is reduced, but the amplitude of the jitter remains about the same:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eHowever, at a 5Hz correction rate, the faster jitter is reduced:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eAnd at a 10 Hz correction rate, significant improvement is seen:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThe improvement in stellar profiles can also be seen at corrections above 1 Hz.  First by looking at the non-AO guided image:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eAnd comparing the non-AO guided image to the AO guided image there is again significant improvement in the FWHM of the star profile:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eTelescope mounts cannot correct faster than about once per second.  The 10Hz rate of the AO will clearly result in improved resolution under the right conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eOS Compatibility\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWindows 32 and 64 bit OS, Mac\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComputer Interface\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eI2C\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eDownloads\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003ch4\u003eUser’s Manual\u003c\/h4\u003e\n\u003cp\u003eManual for the AO-8T adaptive optics unit.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_ao8manual.pdf?v=1684345404\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003cp\u003e\u003c\/p\u003e\n\u003ch4\u003eBackfocus Table\u003c\/h4\u003e\n\u003cp\u003eBackfocus configuration table\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_backfocus.993x0.gif?v=1684345406\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"AO-8A for Aluma cameras","offer_id":44967711408413,"sku":"DL-AO-8A","price":1429.0,"currency_code":"CAD","in_stock":true},{"title":"AO-8T for STT cameras","offer_id":44967711441181,"sku":"DL-AO-8T","price":1429.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"sbig-ao-x-adaptive-optics","title":"SBIG AO-X Adaptive Optics","description":"\u003c!-- more --\u003e\u003cdiv\u003eThe next-generation of adaptive optics for our SBIG large-format cameras.\u003cp\u003eThe SBIG AO-X is a large aperture AO designed to be compatible with all large format SBIG cameras,  including STX-16803, STXL-16200, STXL-11000, STXL-6303, and Aluma AC4040.  The AO-X requies minimal backfocus while offering a large 3″ aperture optical element, which is large enough to cover all sensors available in the STX, STXL, and Aluma AC series.\u003c\/p\u003e\n\u003cp\u003eThe AO-X requires an off-axis guide camera behind the device and in front of the filter wheel (FW8S-STXL or FW7-STX), such as the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/sc-3\/\"\u003eStarChaser SC-3\u003c\/a\u003e. A \u003ca href=\"https:\/\/diffractionlimited.com\/product\/sttstxlstx-remote-guide-head\/\"\u003eRemote Guide Head\u003c\/a\u003e may also be used if you have a custom Off-Axis Guider setup.  Also works with the discontinued STX Guider and self-guided STXL filter wheels.\u003c\/p\u003e\n\u003ch3\u003eAO Results\u003c\/h3\u003e\n\u003cp\u003eThe images below are actual star images showing the effect of image wander corrected at 1 Hz and 10 Hz:\u003c\/p\u003e\n\u003cp\u003e1 Hz Corrections\u003c\/p\u003e\n\u003cp\u003e 10 Hz Corrections\u003c\/p\u003e\n\u003cp\u003eAnd the resulting size of the star image in a long exposure:\u003c\/p\u003e\n\u003cp\u003e1 Hz Corrections\u003c\/p\u003e\n\u003cp\u003e10 Hz Corrections\u003c\/p\u003e\n\u003cp\u003eOther data gathered by Brad Wallis of JPL (Brad Wallis and Benoit Schillings developed the prototype for the original AO-7) show the the effect of rapid corrections on poor seeing.  At 1 Hz the larger, slower component is reduced, but the amplitude of the jitter remains about the same:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eHowever, at a 5Hz correction rate, the faster jitter is reduced:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eAnd at a 10 Hz correction rate, significant improvement is seen:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eThe improvement in stellar profiles can also be seen at corrections above 1 Hz.  First by looking at the non-AO guided image:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eAnd comparing the non-AO guided image to the AO guided image there is again significant improvement in the FWHM of the star profile:\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003eTelescope mounts cannot correct faster than about once per second.  The 10Hz rate of the AO-X will clearly result in improved resolution under the right conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eSupplied through Camera’s I2C Port\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOS Compatibility\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWindows 32 and 64 bit OS, Mac\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComputer Interface\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eI2C\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e6 x 7 x 1.2 in.\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e2.2 lbs (1 kg)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eDownloads\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch4\u003eSpecification Sheet\u003c\/h4\u003e\n\u003cp\u003eTechnical specifications for the AO-X.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_AAS_AOX.pdf?v=1684345412\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eUser’s Manual\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation instructions for your AO-X adaptive optics unit.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_aox_manual_v1_3.pdf?v=1684345416\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967711932701,"sku":"DL-AO-X","price":3249.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SBIG-AO-X-Adaptive-Optics-1__18506.1600282391.1280.1280.jpg?v=1684345581"},{"product_id":"sbig-starchaser-sc-2-off-axis-guider-camera-stf-aluma-and-stc-series","title":"SBIG StarChaser SC-2 Off Axis Guider Camera - STF, Aluma and STC series","description":"\u003c!-- more --\u003e\u003cdiv\u003eThe SBIG StarChaser is the world’s first all-in-one off-axis guider with built-in camera and integrated AO support. Comes complete with MaxIm LT software.\u003ch3\u003eSBIG StarChaser Off-Axis Guider Cameras\u003c\/h3\u003e\n\u003cp\u003eDiffraction Limited’s new SBIG StarChaser is the world’s first, all-in-one independent Off-Axis Guiding Camera with Adaptive Optics support. The StarChaser operates independently of the main camera. It combines a pick-off mirror, guider camera, guide port, and Adaptive Optics control.\u003c\/p\u003e\n\u003cp\u003eStop wasting time with ruined exposures caused by flexure between the main camera and guider.  Off-axis guiding eliminates this problem by using the same optical path for the main camera and the guider.\u003c\/p\u003e\n\u003cp\u003eMost off-axis guider assemblies are awkward to use, consume too much back focus, and require you to focus by slipping a camera inside an eyepiece holder.  SBIG pioneered simplified off-axis guiding, with guide sensors built into CCD cameras. Later, we created the self-guiding filter wheel, placing the guide sensor in the light path ahead of photon-robbing narrowband filters. The StarChaser is the next step in this progression – a fully independent guide camera with AO capability.\u003c\/p\u003e\n\u003ch3\u003eThree Versions Available\u003c\/h3\u003e\n\u003cp\u003eSC-2 is designed to work with our compact SBIG cameras.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-8a\/\"\u003eAO-8A\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTC-7, STC-428 with \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eSTF series (except STF-402) with FW8-8300 or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluma series with FW8S-Aluma or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eLegacy STL cameras with internal filter wheel (requires \u003ca href=\"https:\/\/diffractionlimited.com\/product\/stl-to-starchaser-adapter\/\"\u003eadapter\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eLegacy STT cameras with FW8S-STT filter wheel or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSC-3-LONG is designed to work with large format SBIG cameras with longer backfocus distance.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-x\/\"\u003eAO-X\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTX-16803, STX-16801, STX-9000 with or without FW7-STX\u003c\/li\u003e\n\u003cli\u003eLegacy STL cameras with external filter wheel (requires \u003ca href=\"https:\/\/diffractionlimited.com\/product\/stl-to-starchaser-adapter\/\"\u003eadapter\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eAluma AC 4040 w\/ FW7-STX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSC-3-SHORT is designed to work with large format SBIG cameras with shorter backfocus distance.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-x\/\"\u003eAO-X\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eSTXL-11002, STXL-6303, STXL 16200 with FW8S-STXL\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eNext-Generation Off-Axis Guiding\u003c\/h3\u003e\n\u003cp\u003eThe StarChaser represents our next generation of off-axis guide technology.  It features a high-sensitivity 1.3 megapixel Global Shutter CMOS sensor with 4.8 micron pixels. Unlike competing autoguiders, the StarChaser has a mechanical shutter for easy dark frame correction.  This feature, standard on all SBIG guiders, optimizes sensitivity and eliminates hot pixels that could degrade guiding accuracy.\u003c\/p\u003e\n\u003cp\u003eThe pick-off mirror position is adjustable by loosening a locking knob and sliding the mirror into or out of the housing. You can avoid vignetting the main sensor while optimizing the light path into the guide sensor.  Once that is set, focus is adjusted simply by turning a second knob.\u003c\/p\u003e\n\u003ch3\u003eAdaptive Optics Control\u003c\/h3\u003e\n\u003cp\u003eThanks to the SBIG StarChaser series, our renowned Adaptive Optics (AO) technology is now available for virtually our entire camera line! Our AO-X (available separately) bolts onto the front of the StarChaser SC-3.  Our AO-8A (available separately) bolts onto the front of the StarChaser SC-2.  The StarChaser is in turn attached to the front of an SBIG standard filter wheel and camera.\u003c\/p\u003e\n\u003cp\u003eAdaptive Optics technology eliminates guiding errors caused by common mount problems such as stiction, periodic error, and wind loads.  It can even reduce “slow seeing” effects resulting in higher resolution images.\u003c\/p\u003e\n\u003ch3\u003eThin and Adaptable\u003c\/h3\u003e\n\u003cp\u003eThe SC-2 is just 0.800″ (20.3 mm) thick.  When attaching to a filter wheel the existing adapter plate (0.147″ \/ 3.7 mm thick) would normally be moved from the filter wheel onto the front of the SC-2. When attaching an AO-8A to the front of the SC-2, the adapter plate is not used.\u003c\/p\u003e\n\u003cp\u003eThe SC-3 is just 0.870″ (22.1 mm) thick. When attaching to a filter wheel the existing plate (0.200″ \/ 5.1 mm thick) would normally be moved from the filter wheel onto the front of the StarChaser.\u003c\/p\u003e\n\u003cp\u003ePlease note that smaller diameter adapter plates may vignette the guide sensor.  A variety of optional adapter plates are \u003ca href=\"https:\/\/diffractionlimited.com\/mechanical-adapters\/\"\u003eavailable\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eHighly Adjustable\u003c\/h3\u003e\n\u003cp\u003eEach StarChaser has a range of adjustment for the mirror position and the camera’s backfocus distance.  The mirror position is set to avoid vignetting the main sensor and the guide sensor.  The focus adjustment allows you to parfocalize the StarChaser’s guide sensor with the main camera’s sensor.\u003c\/p\u003e\n\u003cp\u003eThree StarChaser models are available.  The SC-2 accommodates our compact cameras such as STC-7 and Aluma CCD.  The SC-3-LONG accommodates large format cameras with long backfocus distance, such as the STX-16803 with FW7-STX.  The SC-3-SHORT was designed to support our new large format CMOS cameras, which have much shorter backfocus distance than our legacy CCD models.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser pickoff mirror can be adjusted to accommodate different sensors sizes, and it also has an impact on the focus range.\u003c\/p\u003e\n\u003cp\u003eIn the table below, \u003cstrong\u003eMirror Offset Adjustment Range\u003c\/strong\u003e gives the distance from the inner edge of the guide sensor to the optical center.  To avoid vignetting, the mirror should be positioned so it clears the edge of the main sensor.  At faster f\/ratios the separation may need to be increased.  In some optical systems if the mirror is pulled all the way back then the guide sensor may be vignetted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBack Focus Range, Mirror Retracted\u003c\/strong\u003e gives the focus range of the StarChaser model when the mirror is pulled back as far away from the main sensor as possible. This distance is measured from the front of the StarChaser (without any adapters) to the focal plane of the main camera.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBack Focus Range, Mirror Extended \u003c\/strong\u003egives the focus range of the StarChaser model when the mirror is adjusted as far as possible towards the main optical axis.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003ctr\u003e\n\u003cth\u003eModel (Recommended Camera Series)\u003c\/th\u003e\n\u003cth\u003eMirror Offset Adjustment Range\u003c\/th\u003e\n\u003cth\u003eBack Focus Range, Mirror Retracted\u003c\/th\u003e\n\u003cth\u003eBack Focus Range, Mirror Extended\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctbody class=\"row-hover\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-2 (STC, STF, Aluma CCD)\u003c\/td\u003e\n\u003ctd\u003e0.40\" to 0.75\" (10.2 mm to 19.1 mm)\u003c\/td\u003e\n\u003ctd\u003e1.73\" to 2.61\" (43.9 mm to 66.3 mm)\u003c\/td\u003e\n\u003ctd\u003e2.07\" to 2.96\" (52.6 mm to 75.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-3-LONG (STX)\u003c\/td\u003e\n\u003ctd\u003e0.33\" to 1.08\" (8.4 mm to 27.4 mm)\u003c\/td\u003e\n\u003ctd\u003e2.23\" to 3.48\" (56.6 mm to 88.4 mm)\u003c\/td\u003e\n\u003ctd\u003e2.97\" to 4.23\" (75.4 mm to 107.4 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-3-SHORT (Aluma AC, STXL)\u003c\/td\u003e\n\u003ctd\u003e0.66\" to 0.88\" (16.8 mm to 22.4 mm)\u003c\/td\u003e\n\u003ctd\u003e1.51\" to 2.84\" (33.4 mm to 72.1 mm)\u003c\/td\u003e\n\u003ctd\u003e1.73\" to 3.06\" (43.9 mm to 77.7 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003eShowing 1 to 3 of 3 entries\u003c!-- #tablepress-10 from cache --\u003e\u003ch3\u003eSupports Your SBIG Investment\u003c\/h3\u003e\n\u003cp\u003eOur renowned MaxIm LT software is included, providing integrated control of your StarChaser and SBIG main camera.  We also provide API interfaces for third-party software running under Windows, MacOS, or Linux.  An ASCOM standard camera interface is included. ASCOM does not currently support Adaptive Optics.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser series support all currently-manufactured SBIG models, and many of the legacy models.  This includes STC, Aluma AC, Aluma CCD, STX, STXL, STF-1603, STF-3200, ST-1603, ST-3200, and STL research series cameras (via available adapter).\u003c\/p\u003e\n\u003cp\u003eStarChasers support AO-8A (SC-2) and AO-X (SC-3) Adaptive Optics units.  This brings modern AO capability to many models that previously could not support AO operation.  All guiding and AO operations take place independently of the main camera.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser requires a 12V power supply (included) and a USB 2.0 mini cable (6 foot \/ 2 meter cable included).  The StarChaser can send guider commands to the telescope either via ASCOM PulseGuide or an “ST-4” style tracking interface cable (included).\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Regulation\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eNo\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOS Compatibility\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWindows 7, 8, 10 x86\/x64, MacOS 10.14 \"Mojave\" x86 binaries, Ubuntu 18.04 LTS x64, Raspbian Buster armhf, Ubuntu MATE arm64\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComputer Interface\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eUSB 2.0 Mini\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Frame Download\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e0.2 sec\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdaptive Optics Option\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWorks with AO-X (cable required)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePixel Digitization Rate\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e72 megapixels \/ second\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eA\/D Converter\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e10 bits\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e0.9 lb \/ 400 g\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRead Noise\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e5 e- typical\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e12V, 300 mA\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExposure\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e13.5 ns to 59.26 s\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePixel Size\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e4.8 μm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Pixels\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e1,310,720 pixels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor Size\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e6.18 mm x 4.95 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShutter\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eElectronic Global Shutter plus Mechanical Dark Frame Shutter\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImaging Sensor\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAstronomical CMOS 1.3 Megapixel\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter Wheel Option\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAttaches to FW7-STX and FW8S-STXL filter wheels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDark Current e\/p\/s at 0 C\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e5 e-\/p\/s typical at 20C\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImaging \/ Pixel Array\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e1280 x 1024 pixels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Well Capacity\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e10,000 e-\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBackfocus\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAdds 0.87\" (22.1 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eDownloads\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003ch4\u003eProduct overview\u003c\/h4\u003e\n\u003cp\u003eProduct overview of StarChaser guide cameras.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_StarChaserOverview.pdf?v=1684345420\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eUser Manual\u003c\/h4\u003e\n\u003cp\u003eUser’s manual for installing and operating the StarChaser SC-3\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_StarChaser_User_Manual.pdf?v=1684345428\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch3\u003eSoftware\u003c\/h3\u003e\n\u003ch4\u003eDrivers and Camera Configuration Utility\u003c\/h4\u003e\n\u003cp\u003eStarChaser uses the DL Imaging driver package. Download the latest drivers and camera configuration utility.\u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/down\/SetupDLAPI.exe\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eMaxIm LT Software\u003c\/h4\u003e\n\u003cp\u003eCamera owners can request a MaxIm LT license here (camera serial number required):\u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/maxim-lt-registration\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003cp\u003eTo get started immediately, request the full MaxIm DL Pro demo version here (click Demo tab):  \u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/product\/maxim-dl\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003cp\u003eOnce you receive your MaxIm LT license, simply replace your demo license using Help menu Enter License. \u003c\/p\u003e\n\u003ch4\u003eMacOS and Linux Drivers\u003c\/h4\u003e\n\u003cp\u003eAvailable by request.  Please post in our support forum, Aluma section: \u003c\/p\u003e\n\u003ca href=\"https:\/\/forum.diffractionlimited.com\/forums\/aluma-series.49\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003ch4\u003eSoftware Development Kit\u003c\/h4\u003e\n\u003cp\u003eAvailable by request.  Please post in our support forum, Aluma section: \u003c\/p\u003e\n\u003ca href=\"https:\/\/forum.diffractionlimited.com\/forums\/aluma-series.49\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967712555293,"sku":"DL-SC-2","price":1429.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SBIG-StarChaser-SC-2-Off-Axis-Guider-Camera-STF-Aluma-and-STC-series-1__67113.1600282391.1280.1280.jpg?v=1684345540"},{"product_id":"sbig-starchaser-sc-2-ao-8a-bundle","title":"SBIG StarChaser SC-2 \/ AO-8A Bundle","description":"\u003c!-- more --\u003e#N\/A","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967712588061,"sku":"DL-SC2-AO8-PACK","price":3387.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"sbig-starchaser-sc-3-off-axis-guider-camera-stx-series","title":"SBIG StarChaser SC-3 Off Axis Guider Camera - STX series","description":"\u003c!-- more --\u003e\u003cdiv\u003eThe SBIG StarChaser is the world’s first all-in-one off-axis guider with built-in camera and integrated AO support. Comes complete with MaxIm LT software.\u003ch3\u003eSBIG StarChaser Off-Axis Guider Cameras\u003c\/h3\u003e\n\u003cp\u003eDiffraction Limited’s new SBIG StarChaser is the world’s first, all-in-one independent Off-Axis Guiding Camera with Adaptive Optics support. The StarChaser operates independently of the main camera. It combines a pick-off mirror, guider camera, guide port, and Adaptive Optics control.\u003c\/p\u003e\n\u003cp\u003eStop wasting time with ruined exposures caused by flexure between the main camera and guider.  Off-axis guiding eliminates this problem by using the same optical path for the main camera and the guider.\u003c\/p\u003e\n\u003cp\u003eMost off-axis guider assemblies are awkward to use, consume too much back focus, and require you to focus by slipping a camera inside an eyepiece holder.  SBIG pioneered simplified off-axis guiding, with guide sensors built into CCD cameras. Later, we created the self-guiding filter wheel, placing the guide sensor in the light path ahead of photon-robbing narrowband filters. The StarChaser is the next step in this progression – a fully independent guide camera with AO capability.\u003c\/p\u003e\n\u003ch3\u003eThree Versions Available\u003c\/h3\u003e\n\u003cp\u003eSC-2 is designed to work with our compact SBIG cameras.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-8a\/\"\u003eAO-8A\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTC-7, STC-428 with \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eSTF series (except STF-402) with FW8-8300 or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluma series with FW8S-Aluma or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eLegacy STL cameras with internal filter wheel (requires \u003ca href=\"https:\/\/diffractionlimited.com\/product\/stl-to-starchaser-adapter\/\"\u003eadapter\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eLegacy STT cameras with FW8S-STT filter wheel or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSC-3-LONG is designed to work with large format SBIG cameras with longer backfocus distance.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-x\/\"\u003eAO-X\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTX-16803, STX-16801, STX-9000 with or without FW7-STX\u003c\/li\u003e\n\u003cli\u003eLegacy STL cameras with external filter wheel (requires \u003ca href=\"https:\/\/diffractionlimited.com\/product\/stl-to-starchaser-adapter\/\"\u003eadapter\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eAluma AC 4040 w\/ FW7-STX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSC-3-SHORT is designed to work with large format SBIG cameras with shorter backfocus distance.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-x\/\"\u003eAO-X\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eSTXL-11002, STXL-6303, STXL 16200 with FW8S-STXL\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eNext-Generation Off-Axis Guiding\u003c\/h3\u003e\n\u003cp\u003eThe StarChaser represents our next generation of off-axis guide technology.  It features a high-sensitivity 1.3 megapixel Global Shutter CMOS sensor with 4.8 micron pixels. Unlike competing autoguiders, the StarChaser has a mechanical shutter for easy dark frame correction.  This feature, standard on all SBIG guiders, optimizes sensitivity and eliminates hot pixels that could degrade guiding accuracy.\u003c\/p\u003e\n\u003cp\u003eThe pick-off mirror position is adjustable by loosening a locking knob and sliding the mirror into or out of the housing. You can avoid vignetting the main sensor while optimizing the light path into the guide sensor.  Once that is set, focus is adjusted simply by turning a second knob.\u003c\/p\u003e\n\u003ch3\u003eAdaptive Optics Control\u003c\/h3\u003e\n\u003cp\u003eThanks to the SBIG StarChaser series, our renowned Adaptive Optics (AO) technology is now available for virtually our entire camera line! Our AO-X (available separately) bolts onto the front of the StarChaser SC-3.  Our AO-8A (available separately) bolts onto the front of the StarChaser SC-2.  The StarChaser is in turn attached to the front of an SBIG standard filter wheel and camera.\u003c\/p\u003e\n\u003cp\u003eAdaptive Optics technology eliminates guiding errors caused by common mount problems such as stiction, periodic error, and wind loads.  It can even reduce “slow seeing” effects resulting in higher resolution images.\u003c\/p\u003e\n\u003ch3\u003eThin and Adaptable\u003c\/h3\u003e\n\u003cp\u003eThe SC-2 is just 0.800″ (20.3 mm) thick.  When attaching to a filter wheel the existing adapter plate (0.147″ \/ 3.7 mm thick) would normally be moved from the filter wheel onto the front of the SC-2. When attaching an AO-8A to the front of the SC-2, the adapter plate is not used.\u003c\/p\u003e\n\u003cp\u003eThe SC-3 is just 0.870″ (22.1 mm) thick. When attaching to a filter wheel the existing plate (0.200″ \/ 5.1 mm thick) would normally be moved from the filter wheel onto the front of the StarChaser.\u003c\/p\u003e\n\u003cp\u003ePlease note that smaller diameter adapter plates may vignette the guide sensor.  A variety of optional adapter plates are \u003ca href=\"https:\/\/diffractionlimited.com\/mechanical-adapters\/\"\u003eavailable\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eHighly Adjustable\u003c\/h3\u003e\n\u003cp\u003eEach StarChaser has a range of adjustment for the mirror position and the camera’s backfocus distance.  The mirror position is set to avoid vignetting the main sensor and the guide sensor.  The focus adjustment allows you to parfocalize the StarChaser’s guide sensor with the main camera’s sensor.\u003c\/p\u003e\n\u003cp\u003eThree StarChaser models are available.  The SC-2 accommodates our compact cameras such as STC-7 and Aluma CCD.  The SC-3-LONG accommodates large format cameras with long backfocus distance, such as the STX-16803 with FW7-STX.  The SC-3-SHORT was designed to support our new large format CMOS cameras, which have much shorter backfocus distance than our legacy CCD models.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser pickoff mirror can be adjusted to accommodate different sensors sizes, and it also has an impact on the focus range.\u003c\/p\u003e\n\u003cp\u003eIn the table below, \u003cstrong\u003eMirror Offset Adjustment Range\u003c\/strong\u003e gives the distance from the inner edge of the guide sensor to the optical center.  To avoid vignetting, the mirror should be positioned so it clears the edge of the main sensor.  At faster f\/ratios the separation may need to be increased.  In some optical systems if the mirror is pulled all the way back then the guide sensor may be vignetted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBack Focus Range, Mirror Retracted\u003c\/strong\u003e gives the focus range of the StarChaser model when the mirror is pulled back as far away from the main sensor as possible. This distance is measured from the front of the StarChaser (without any adapters) to the focal plane of the main camera.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBack Focus Range, Mirror Extended \u003c\/strong\u003egives the focus range of the StarChaser model when the mirror is adjusted as far as possible towards the main optical axis.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003ctr\u003e\n\u003cth\u003eModel (Recommended Camera Series)\u003c\/th\u003e\n\u003cth\u003eMirror Offset Adjustment Range\u003c\/th\u003e\n\u003cth\u003eBack Focus Range, Mirror Retracted\u003c\/th\u003e\n\u003cth\u003eBack Focus Range, Mirror Extended\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctbody class=\"row-hover\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-2 (STC, STF, Aluma CCD)\u003c\/td\u003e\n\u003ctd\u003e0.40\" to 0.75\" (10.2 mm to 19.1 mm)\u003c\/td\u003e\n\u003ctd\u003e1.73\" to 2.61\" (43.9 mm to 66.3 mm)\u003c\/td\u003e\n\u003ctd\u003e2.07\" to 2.96\" (52.6 mm to 75.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-3-LONG (STX)\u003c\/td\u003e\n\u003ctd\u003e0.33\" to 1.08\" (8.4 mm to 27.4 mm)\u003c\/td\u003e\n\u003ctd\u003e2.23\" to 3.48\" (56.6 mm to 88.4 mm)\u003c\/td\u003e\n\u003ctd\u003e2.97\" to 4.23\" (75.4 mm to 107.4 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-3-SHORT (Aluma AC, STXL)\u003c\/td\u003e\n\u003ctd\u003e0.66\" to 0.88\" (16.8 mm to 22.4 mm)\u003c\/td\u003e\n\u003ctd\u003e1.51\" to 2.84\" (33.4 mm to 72.1 mm)\u003c\/td\u003e\n\u003ctd\u003e1.73\" to 3.06\" (43.9 mm to 77.7 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003eShowing 1 to 3 of 3 entries\u003c!-- #tablepress-10 from cache --\u003e\u003ch3\u003eSupports Your SBIG Investment\u003c\/h3\u003e\n\u003cp\u003eOur renowned MaxIm LT software is included, providing integrated control of your StarChaser and SBIG main camera.  We also provide API interfaces for third-party software running under Windows, MacOS, or Linux.  An ASCOM standard camera interface is included. ASCOM does not currently support Adaptive Optics.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser series support all currently-manufactured SBIG models, and many of the legacy models.  This includes STC, Aluma AC, Aluma CCD, STX, STXL, STF-1603, STF-3200, ST-1603, ST-3200, and STL research series cameras (via available adapter).\u003c\/p\u003e\n\u003cp\u003eStarChasers support AO-8A (SC-2) and AO-X (SC-3) Adaptive Optics units.  This brings modern AO capability to many models that previously could not support AO operation.  All guiding and AO operations take place independently of the main camera.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser requires a 12V power supply (included) and a USB 2.0 mini cable (6 foot \/ 2 meter cable included).  The StarChaser can send guider commands to the telescope either via ASCOM PulseGuide or an “ST-4” style tracking interface cable (included).\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Regulation\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eNo\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOS Compatibility\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWindows 7, 8, 10 x86\/x64, MacOS 10.14 \"Mojave\" x86 binaries, Ubuntu 18.04 LTS x64, Raspbian Buster armhf, Ubuntu MATE arm64\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComputer Interface\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eUSB 2.0 Mini\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Frame Download\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e0.2 sec\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdaptive Optics Option\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWorks with AO-X (cable required)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePixel Digitization Rate\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e72 megapixels \/ second\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eA\/D Converter\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e10 bits\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e0.9 lb \/ 400 g\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRead Noise\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e5 e- typical\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e12V, 300 mA\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExposure\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e13.5 ns to 59.26 s\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePixel Size\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e4.8 μm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Pixels\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e1,310,720 pixels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor Size\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e6.18 mm x 4.95 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShutter\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eElectronic Global Shutter plus Mechanical Dark Frame Shutter\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImaging Sensor\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAstronomical CMOS 1.3 Megapixel\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter Wheel Option\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAttaches to FW7-STX and FW8S-STXL filter wheels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDark Current e\/p\/s at 0 C\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e5 e-\/p\/s typical at 20C\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImaging \/ Pixel Array\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e1280 x 1024 pixels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Well Capacity\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e10,000 e-\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBackfocus\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAdds 0.87\" (22.1 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eDownloads\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003ch4\u003eProduct overview\u003c\/h4\u003e\n\u003cp\u003eProduct overview of StarChaser guide cameras.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_StarChaserOverview.pdf?v=1684345420\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eUser Manual\u003c\/h4\u003e\n\u003cp\u003eUser’s manual for installing and operating the StarChaser SC-3\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_StarChaser_User_Manual.pdf?v=1684345428\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch3\u003eSoftware\u003c\/h3\u003e\n\u003ch4\u003eDrivers and Camera Configuration Utility\u003c\/h4\u003e\n\u003cp\u003eStarChaser uses the DL Imaging driver package. Download the latest drivers and camera configuration utility.\u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/down\/SetupDLAPI.exe\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eMaxIm LT Software\u003c\/h4\u003e\n\u003cp\u003eCamera owners can request a MaxIm LT license here (camera serial number required):\u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/maxim-lt-registration\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003cp\u003eTo get started immediately, request the full MaxIm DL Pro demo version here (click Demo tab):  \u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/product\/maxim-dl\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003cp\u003eOnce you receive your MaxIm LT license, simply replace your demo license using Help menu Enter License. \u003c\/p\u003e\n\u003ch4\u003eMacOS and Linux Drivers\u003c\/h4\u003e\n\u003cp\u003eAvailable by request.  Please post in our support forum, Aluma section: \u003c\/p\u003e\n\u003ca href=\"https:\/\/forum.diffractionlimited.com\/forums\/aluma-series.49\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003ch4\u003eSoftware Development Kit\u003c\/h4\u003e\n\u003cp\u003eAvailable by request.  Please post in our support forum, Aluma section: \u003c\/p\u003e\n\u003ca href=\"https:\/\/forum.diffractionlimited.com\/forums\/aluma-series.49\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967712653597,"sku":"DL-SC-3","price":1849.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SBIG-StarChaser-SC-3-Off-Axis-Guider-Camera-STX-series-1__27628.1600282392.1280.1280.jpg?v=1684345543"},{"product_id":"sbig-starchaser-sc-3-ao-x-bundle","title":"SBIG StarChaser SC-3 \/ AO-X Bundle","description":"\u003c!-- more --\u003e#N\/A","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967712719133,"sku":"DL-SC3-AOX-PACK","price":5207.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"sbig-starchaser-sc-4-off-axis-guider-camera-stxl-and-aluma-ac-series","title":"SBIG StarChaser SC-4 Off Axis Guider Camera - STXL  and Aluma AC series","description":"\u003c!-- more --\u003e\u003cdiv\u003eThe SBIG StarChaser is the world’s first all-in-one off-axis guider with built-in camera and integrated AO support. Comes complete with MaxIm LT software.\u003ch3\u003eSBIG StarChaser Off-Axis Guider Cameras\u003c\/h3\u003e\n\u003cp\u003eDiffraction Limited’s new SBIG StarChaser is the world’s first, all-in-one independent Off-Axis Guiding Camera with Adaptive Optics support. The StarChaser operates independently of the main camera. It combines a pick-off mirror, guider camera, guide port, and Adaptive Optics control.\u003c\/p\u003e\n\u003cp\u003eStop wasting time with ruined exposures caused by flexure between the main camera and guider.  Off-axis guiding eliminates this problem by using the same optical path for the main camera and the guider.\u003c\/p\u003e\n\u003cp\u003eMost off-axis guider assemblies are awkward to use, consume too much back focus, and require you to focus by slipping a camera inside an eyepiece holder.  SBIG pioneered simplified off-axis guiding, with guide sensors built into CCD cameras. Later, we created the self-guiding filter wheel, placing the guide sensor in the light path ahead of photon-robbing narrowband filters. The StarChaser is the next step in this progression – a fully independent guide camera with AO capability.\u003c\/p\u003e\n\u003ch3\u003eThree Versions Available\u003c\/h3\u003e\n\u003cp\u003eSC-2 is designed to work with our compact SBIG cameras.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-8a\/\"\u003eAO-8A\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTC-7, STC-428 with \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eSTF series (except STF-402) with FW8-8300 or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluma series with FW8S-Aluma or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eLegacy STL cameras with internal filter wheel (requires \u003ca href=\"https:\/\/diffractionlimited.com\/product\/stl-to-starchaser-adapter\/\"\u003eadapter\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eLegacy STT cameras with FW8S-STT filter wheel or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/filter-wheel-spacer\/\"\u003eFilter Wheel Spacer\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSC-3-LONG is designed to work with large format SBIG cameras with longer backfocus distance.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-x\/\"\u003eAO-X\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSTX-16803, STX-16801, STX-9000 with or without FW7-STX\u003c\/li\u003e\n\u003cli\u003eLegacy STL cameras with external filter wheel (requires \u003ca href=\"https:\/\/diffractionlimited.com\/product\/stl-to-starchaser-adapter\/\"\u003eadapter\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eAluma AC 4040 w\/ FW7-STX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSC-3-SHORT is designed to work with large format SBIG cameras with shorter backfocus distance.  It supports the \u003ca href=\"https:\/\/diffractionlimited.com\/product\/ao-x\/\"\u003eAO-X\u003c\/a\u003e adaptive optics unit.  Supported cameras include:\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eSTXL-11002, STXL-6303, STXL 16200 with FW8S-STXL\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eNext-Generation Off-Axis Guiding\u003c\/h3\u003e\n\u003cp\u003eThe StarChaser represents our next generation of off-axis guide technology.  It features a high-sensitivity 1.3 megapixel Global Shutter CMOS sensor with 4.8 micron pixels. Unlike competing autoguiders, the StarChaser has a mechanical shutter for easy dark frame correction.  This feature, standard on all SBIG guiders, optimizes sensitivity and eliminates hot pixels that could degrade guiding accuracy.\u003c\/p\u003e\n\u003cp\u003eThe pick-off mirror position is adjustable by loosening a locking knob and sliding the mirror into or out of the housing. You can avoid vignetting the main sensor while optimizing the light path into the guide sensor.  Once that is set, focus is adjusted simply by turning a second knob.\u003c\/p\u003e\n\u003ch3\u003eAdaptive Optics Control\u003c\/h3\u003e\n\u003cp\u003eThanks to the SBIG StarChaser series, our renowned Adaptive Optics (AO) technology is now available for virtually our entire camera line! Our AO-X (available separately) bolts onto the front of the StarChaser SC-3.  Our AO-8A (available separately) bolts onto the front of the StarChaser SC-2.  The StarChaser is in turn attached to the front of an SBIG standard filter wheel and camera.\u003c\/p\u003e\n\u003cp\u003eAdaptive Optics technology eliminates guiding errors caused by common mount problems such as stiction, periodic error, and wind loads.  It can even reduce “slow seeing” effects resulting in higher resolution images.\u003c\/p\u003e\n\u003ch3\u003eThin and Adaptable\u003c\/h3\u003e\n\u003cp\u003eThe SC-2 is just 0.800″ (20.3 mm) thick.  When attaching to a filter wheel the existing adapter plate (0.147″ \/ 3.7 mm thick) would normally be moved from the filter wheel onto the front of the SC-2. When attaching an AO-8A to the front of the SC-2, the adapter plate is not used.\u003c\/p\u003e\n\u003cp\u003eThe SC-3 is just 0.870″ (22.1 mm) thick. When attaching to a filter wheel the existing plate (0.200″ \/ 5.1 mm thick) would normally be moved from the filter wheel onto the front of the StarChaser.\u003c\/p\u003e\n\u003cp\u003ePlease note that smaller diameter adapter plates may vignette the guide sensor.  A variety of optional adapter plates are \u003ca href=\"https:\/\/diffractionlimited.com\/mechanical-adapters\/\"\u003eavailable\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eHighly Adjustable\u003c\/h3\u003e\n\u003cp\u003eEach StarChaser has a range of adjustment for the mirror position and the camera’s backfocus distance.  The mirror position is set to avoid vignetting the main sensor and the guide sensor.  The focus adjustment allows you to parfocalize the StarChaser’s guide sensor with the main camera’s sensor.\u003c\/p\u003e\n\u003cp\u003eThree StarChaser models are available.  The SC-2 accommodates our compact cameras such as STC-7 and Aluma CCD.  The SC-3-LONG accommodates large format cameras with long backfocus distance, such as the STX-16803 with FW7-STX.  The SC-3-SHORT was designed to support our new large format CMOS cameras, which have much shorter backfocus distance than our legacy CCD models.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser pickoff mirror can be adjusted to accommodate different sensors sizes, and it also has an impact on the focus range.\u003c\/p\u003e\n\u003cp\u003eIn the table below, \u003cstrong\u003eMirror Offset Adjustment Range\u003c\/strong\u003e gives the distance from the inner edge of the guide sensor to the optical center.  To avoid vignetting, the mirror should be positioned so it clears the edge of the main sensor.  At faster f\/ratios the separation may need to be increased.  In some optical systems if the mirror is pulled all the way back then the guide sensor may be vignetted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBack Focus Range, Mirror Retracted\u003c\/strong\u003e gives the focus range of the StarChaser model when the mirror is pulled back as far away from the main sensor as possible. This distance is measured from the front of the StarChaser (without any adapters) to the focal plane of the main camera.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBack Focus Range, Mirror Extended \u003c\/strong\u003egives the focus range of the StarChaser model when the mirror is adjusted as far as possible towards the main optical axis.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003ctr\u003e\n\u003cth\u003eModel (Recommended Camera Series)\u003c\/th\u003e\n\u003cth\u003eMirror Offset Adjustment Range\u003c\/th\u003e\n\u003cth\u003eBack Focus Range, Mirror Retracted\u003c\/th\u003e\n\u003cth\u003eBack Focus Range, Mirror Extended\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctbody class=\"row-hover\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-2 (STC, STF, Aluma CCD)\u003c\/td\u003e\n\u003ctd\u003e0.40\" to 0.75\" (10.2 mm to 19.1 mm)\u003c\/td\u003e\n\u003ctd\u003e1.73\" to 2.61\" (43.9 mm to 66.3 mm)\u003c\/td\u003e\n\u003ctd\u003e2.07\" to 2.96\" (52.6 mm to 75.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-3-LONG (STX)\u003c\/td\u003e\n\u003ctd\u003e0.33\" to 1.08\" (8.4 mm to 27.4 mm)\u003c\/td\u003e\n\u003ctd\u003e2.23\" to 3.48\" (56.6 mm to 88.4 mm)\u003c\/td\u003e\n\u003ctd\u003e2.97\" to 4.23\" (75.4 mm to 107.4 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarChaser SC-3-SHORT (Aluma AC, STXL)\u003c\/td\u003e\n\u003ctd\u003e0.66\" to 0.88\" (16.8 mm to 22.4 mm)\u003c\/td\u003e\n\u003ctd\u003e1.51\" to 2.84\" (33.4 mm to 72.1 mm)\u003c\/td\u003e\n\u003ctd\u003e1.73\" to 3.06\" (43.9 mm to 77.7 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003eShowing 1 to 3 of 3 entries\u003c!-- #tablepress-10 from cache --\u003e\u003ch3\u003eSupports Your SBIG Investment\u003c\/h3\u003e\n\u003cp\u003eOur renowned MaxIm LT software is included, providing integrated control of your StarChaser and SBIG main camera.  We also provide API interfaces for third-party software running under Windows, MacOS, or Linux.  An ASCOM standard camera interface is included. ASCOM does not currently support Adaptive Optics.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser series support all currently-manufactured SBIG models, and many of the legacy models.  This includes STC, Aluma AC, Aluma CCD, STX, STXL, STF-1603, STF-3200, ST-1603, ST-3200, and STL research series cameras (via available adapter).\u003c\/p\u003e\n\u003cp\u003eStarChasers support AO-8A (SC-2) and AO-X (SC-3) Adaptive Optics units.  This brings modern AO capability to many models that previously could not support AO operation.  All guiding and AO operations take place independently of the main camera.\u003c\/p\u003e\n\u003cp\u003eThe StarChaser requires a 12V power supply (included) and a USB 2.0 mini cable (6 foot \/ 2 meter cable included).  The StarChaser can send guider commands to the telescope either via ASCOM PulseGuide or an “ST-4” style tracking interface cable (included).\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Regulation\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eNo\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOS Compatibility\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWindows 7, 8, 10 x86\/x64, MacOS 10.14 \"Mojave\" x86 binaries, Ubuntu 18.04 LTS x64, Raspbian Buster armhf, Ubuntu MATE arm64\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComputer Interface\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eUSB 2.0 Mini\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Frame Download\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e0.2 sec\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdaptive Optics Option\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eWorks with AO-X (cable required)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePixel Digitization Rate\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e72 megapixels \/ second\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eA\/D Converter\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e10 bits\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e0.9 lb \/ 400 g\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRead Noise\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e5 e- typical\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e12V, 300 mA\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExposure\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e13.5 ns to 59.26 s\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePixel Size\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e4.8 μm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Pixels\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e1,310,720 pixels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor Size\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e6.18 mm x 4.95 mm\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShutter\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eElectronic Global Shutter plus Mechanical Dark Frame Shutter\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImaging Sensor\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAstronomical CMOS 1.3 Megapixel\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFilter Wheel Option\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAttaches to FW7-STX and FW8S-STXL filter wheels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDark Current e\/p\/s at 0 C\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e5 e-\/p\/s typical at 20C\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImaging \/ Pixel Array\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e1280 x 1024 pixels\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFull Well Capacity\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003e10,000 e-\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBackfocus\u003c\/th\u003e\n\u003ctd\u003e\u003cp\u003eAdds 0.87\" (22.1 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eDownloads\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003ch4\u003eProduct overview\u003c\/h4\u003e\n\u003cp\u003eProduct overview of StarChaser guide cameras.\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_StarChaserOverview.pdf?v=1684345420\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eUser Manual\u003c\/h4\u003e\n\u003cp\u003eUser’s manual for installing and operating the StarChaser SC-3\u003c\/p\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_StarChaser_User_Manual.pdf?v=1684345428\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch3\u003eSoftware\u003c\/h3\u003e\n\u003ch4\u003eDrivers and Camera Configuration Utility\u003c\/h4\u003e\n\u003cp\u003eStarChaser uses the DL Imaging driver package. Download the latest drivers and camera configuration utility.\u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/down\/SetupDLAPI.exe\" target=\"_blank\"\u003eDownload\u003c\/a\u003e\u003ch4\u003eMaxIm LT Software\u003c\/h4\u003e\n\u003cp\u003eCamera owners can request a MaxIm LT license here (camera serial number required):\u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/maxim-lt-registration\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003cp\u003eTo get started immediately, request the full MaxIm DL Pro demo version here (click Demo tab):  \u003c\/p\u003e\n\u003ca href=\"https:\/\/diffractionlimited.com\/product\/maxim-dl\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003cp\u003eOnce you receive your MaxIm LT license, simply replace your demo license using Help menu Enter License. \u003c\/p\u003e\n\u003ch4\u003eMacOS and Linux Drivers\u003c\/h4\u003e\n\u003cp\u003eAvailable by request.  Please post in our support forum, Aluma section: \u003c\/p\u003e\n\u003ca href=\"https:\/\/forum.diffractionlimited.com\/forums\/aluma-series.49\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\u003ch4\u003eSoftware Development Kit\u003c\/h4\u003e\n\u003cp\u003eAvailable by request.  Please post in our support forum, Aluma section: \u003c\/p\u003e\n\u003ca href=\"https:\/\/forum.diffractionlimited.com\/forums\/aluma-series.49\/\" target=\"_blank\"\u003eLink \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967712784669,"sku":"DL-SC-4","price":1849.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SBIG-StarChaser-SC-4-Off-Axis-Guider-Camera-STXL-and-Aluma-AC-series-1__46261.1600282392.1280.1280.jpg?v=1684345584"},{"product_id":"sbig-starchaser-sc-4-ao-x-bundle","title":"SBIG StarChaser SC-4\/ AO-X Bundle","description":"\u003c!-- more --\u003e#N\/A","brand":"SBIG","offers":[{"title":"Default Title","offer_id":44967712850205,"sku":"DL-SC4-AOX-PACK","price":4738.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"sbig-ao-8-conversion-plate","title":"SBIG AO-8 Conversion Plate","description":"\u003c!-- more --\u003e\u003cdiv\u003eConversion plates can be used to adapt AO-8 \/ AO-8T \/ AO-8A adaptive optics units to different camera models.\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"A0-8T\/AO-8A","offer_id":44967713079581,"sku":"DL-51808","price":267.0,"currency_code":"CAD","in_stock":true},{"title":"A0-8 for Older Model Camera","offer_id":44967713112349,"sku":"DL-51816","price":267.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SBIG-AO-8-Conversion-Plate-51816__90828.1600282393.1280.1280.jpg?v=1684345589"},{"product_id":"sbig-stl-to-starchaser-adapter","title":"SBIG STL to StarChaser Adapter","description":"\u003c!-- more --\u003e\u003cdiv\u003eAttach a modern \u003ca href=\"https:\/\/diffractionlimited.com\/product\/sc-2\/\"\u003eStarChaser SC-2\u003c\/a\u003e or \u003ca href=\"https:\/\/diffractionlimited.com\/product\/sc-3\/\"\u003eSBIG StarChaser SC-3\u003c\/a\u003e off-axis guide camera to your trusty SBIG STL Research Series camera.\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"SC-2 Adapter","offer_id":44967713145117,"sku":"DL-ACC08","price":169.0,"currency_code":"CAD","in_stock":true},{"title":"SC-3 Adapter","offer_id":44967713177885,"sku":"DL-ACC10","price":169.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/SBIG-STL-to-StarChaser-Adapter-2__96439.1600282394.1280.1280.jpg?v=1684345591"},{"product_id":"celestron-large-sct-edgehd-adapter-v2-for-off-axis-guider","title":"Celestron Large SCT \u0026 EdgeHD Adapter V2 for Off-Axis Guider","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Celestron Off-Axis Guider to 9.25\", 11\", and 14\" SCT \u0026amp; EdgeHD telescopes\u003c\/li\u003e\n\u003cli\u003eProvides a 63mm clear aperture to fully illuminate full-frame camera sensors\u003c\/li\u003e\n\u003cli\u003eEngineered with a 38mm optical length for correct DSLR back-focus spacing\u003c\/li\u003e\n\u003cli\u003eWeighs just 6 oz (170.09 g)\u003c\/li\u003e\n\u003cli\u003eDurable black anodized aluminum construction with glare-reducing internal surfaces\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\u003eCelestron Large SCT \u0026amp; EdgeHD Adapter V2 for Off-Axis Guider\u003c\/h2\u003e\n\u003cp\u003eThe Celestron Large SCT \u0026amp; EdgeHD Adapter V2 for Off-Axis Guider provides the critical connection for full-frame imaging, featuring a 63mm clear aperture to prevent vignetting on large sensors. Its precisely machined 38mm optical length supplies the exact back-focus required for DSLR cameras when used with a Celestron Off-Axis Guider on 9.25\", 11\", or 14\" telescopes, all within a lightweight 6 oz (170.09 g) aluminum body.\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\u003eIlluminate Your Full Frame: A 63mm Clear Aperture for Large Sensors\u003c\/h3\u003e\n\u003cp\u003eYour large SCT or EdgeHD optical tube produces a substantial image circle, but standard adapters can become a bottleneck, causing vignetting on full-frame sensors. This adapter solves that problem with a massive 63mm (2.48\") clear aperture, ensuring the entire light cone reaches your Canon 5D, 6D, or other large-format camera sensor. This allows you to utilize the full optical power of your 9.25\", 11\", or 14\" telescope without dark corners compromising your images.\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\u003e38mm Optical Length: The V2 Advantage for DSLR Back-Focus\u003c\/h3\u003e\n\u003cp\u003eAchieving the correct back-focus distance is non-negotiable for sharp, coma-free images, especially with an Off-Axis Guider in the train. The V2 version of this adapter is engineered with a specific 38mm optical length. This length is no accident—it's the exact spacing needed to place a DSLR camera sensor at the focal plane when paired with the Celestron Off-Axis Guider, eliminating the need for extra, potentially flexing spacers and simplifying your imaging setup.\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\u003eField-Ready Construction: 6 oz of Black Anodized Aluminum\u003c\/h3\u003e\n\u003cp\u003eBuilt from machined, black-anodized aluminum, this adapter weighs only 6 oz (170.09 g), adding minimal weight to your imaging train and making balancing easier. The internal surfaces are sandblasted to eliminate internal reflections and maximize image contrast. A knurled exterior surface provides a secure grip for easy threading and unthreading, even with gloves on during cold nights.\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\"\u003eWhat is the main purpose of the Large SCT \u0026amp; EdgeHD Adapter V2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary purpose is to connect a Celestron Off-Axis Guider (OAG) to a larger 9.25\", 11\", or 14\" SCT or EdgeHD telescope. It provides a wide \u003cstrong\u003e63mm clear aperture\u003c\/strong\u003e to prevent vignetting on full-frame sensors and has a specific \u003cstrong\u003e38mm optical length\u003c\/strong\u003e to achieve correct back-focus for DSLR cameras without extra spacers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this V2 adapter for my EdgeHD 11\" and a full-frame DSLR camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this adapter is highly recommended for that exact setup. The EdgeHD 11\" produces a large, corrected image circle. This adapter's 63mm aperture ensures that light cone isn't cut off before reaching your full-frame sensor, preventing vignetting. The 38mm length also simplifies achieving the correct back-focus when using Celestron's OAG.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWith the Adapter V2, will I still need T-spacers for my DSLR and Celestron OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The key benefit of the V2 adapter is its 38mm optical length, which is specifically designed to provide the correct spacing for a standard DSLR camera when the Celestron Off-Axis Guider is in the imaging train. This eliminates the trial-and-error of adding separate spacers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Large SCT \u0026amp; EdgeHD Adapter V2 with a smaller 8\" SCT or EdgeHD?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it may physically thread on, this adapter is optimized for the larger rear cells and image circles of the 9.25\", 11\", and 14\" models. For an 8\" telescope, Celestron offers a different, smaller adapter (#93648) designed for its smaller image circle and physical size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter without an Off-Axis Guider?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is specifically designed to be part of an imaging train that includes the Celestron Off-Axis Guider. Its 38mm length is calculated based on the OAG being present. If you are not using an OAG, you will need a different set of adapters and spacers to achieve the correct back-focus for your camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the sandblasted interior of the Adapter V2 help my images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe sandblasted, non-reflective internal surfaces scatter stray light that might otherwise bounce around inside the adapter and reach your camera sensor. This reduces glare and significantly improves the contrast of your final images, making faint details more visible against a dark sky background.\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\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e38mm (1.49\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e63mm (2.48\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eAluminum Black Anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e6 oz (170.09 g)\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\"\u003eCelestron Large SCT \u0026amp; EdgeHD Adapter V2 for Off-Axis Guider\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/celestron-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eCelestron 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44967733166365,"sku":"CEL-93666","price":58.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Celestron-Large-Adapter-V2-OAG-93666-1__36832.1602702321.1280.1280.jpg?v=1684345695"},{"product_id":"primalucelab-plus-raisers-for-eagle-core","title":"PrimaLuceLab PLUS Raisers for EAGLE CORE","description":"\u003c!-- more --\u003ePLUS raisers for EAGLE CORE allow you to install, on the side of its body, the 80mm PLUS guide rings without them to touch the EAGLE CORE body. This way you can install the guide scope on the side and fix the DSLR camera with its photo lens on top. This is the way to use your DSLR camera to record long exposure astrophotography of deep-sky objects with autoguide and without a telescope!\u003cdiv\u003e\n\u003cp\u003e\u003cimg alt=\"PLUS raisers for EAGLE CORE\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_PrimaLuceLab_EAGLE_CORE_control_unit_for_astrophotography_with_DSLR_camera_Description_6.jpg?v=1684345998\" title=\"PLUS raisers for EAGLE CORE\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn order to use EAGLE CORE together with a telephoto lens (and guide scope in parallel) you have to add \"140mm PLUS dovetail bar\" to be connected under EAGLE CORE body, in order to install everything on the equatorial mount. In the upper part the Eagle Core has a 1 1\/4\" photo thread to connect a photo ball head and then the camera. If you have an heavy photo lens (for example with focal length higher than 200mm) you can add the \"PLUS Vixen+Losmandy dovetail clamp\". Then you can connect the \"PLUS 90mm Vixen dovetail bar\" under the camera and then connect everything in the dovetail clamp. The guide scope is installed, using the optional 80mm PLUS guide rings and PLUS raisers, to be fixed on the side of EAGLE CORE.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"PLUS raisers for EAGLE CORE\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_PrimaLuceLab_PLUS_raisers_for_EAGLE_CORE_Description_2.jpg?v=1684345999\" title=\"PLUS raisers for EAGLE CORE\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"PrimaLuceLab","offers":[{"title":"Default Title","offer_id":44967831634205,"sku":"PLL-EAGLECORE-DI","price":35.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PrimaLuceLab-PLUS-raisers-for-EAGLE-CORE__56512.1617396002.1280.1280.jpg?v=1684346013"},{"product_id":"primalucelab-60mm-compactguide-scope-with-plus-80mm-guide-rings","title":"PrimaLuceLab 60mm CompactGuide Scope with PLUS 80mm Guide Rings","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDual-purpose guide scope and optical finder\u003c\/li\u003e\n\u003cli\u003eAchromatic lens for sharp guide stars\u003c\/li\u003e\n\u003cli\u003eNon-rotating helical focuser maintains camera orientation\u003c\/li\u003e\n\u003cli\u003eIncludes PrimaLuceLab PLUS 80mm guide rings\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" accessories and T2-threaded cameras\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\u003eDownloads\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\u003ePrimaLuceLab 60mm CompactGuide Scope with PLUS 80mm Guide Rings\u003c\/h2\u003e\n\u003cp\u003eThe PrimaLuceLab 60mm CompactGuide Scope with PLUS 80mm Guide Rings is a dual-purpose instrument, acting as both a precise autoguider and a wide-field optical finder. An internal achromatic lens provides sharp stellar images for accurate tracking, and its non-rotating helical focuser maintains your guide camera's orientation perfectly. The integrated PLUS guide rings lock the scope down without flexure, creating a rigid pointing platform for your imaging system.\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\u003eDual-Role Optical Design: Guide Scope and Finder\u003c\/h3\u003e\n\u003cp\u003eThis instrument is engineered for two critical roles at the telescope. When connected to an autoguiding camera, its achromatic optics render pinpoint stars, providing a clean signal for your software to make precise tracking corrections. For visual use, you can insert a standard 1.25\" eyepiece with the included extension, transforming the guide scope into a capable finder for locating and centering 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\u003ePrecision Guiding: The Non-Rotating Helical Focuser\u003c\/h3\u003e\n\u003cp\u003eA key feature for any serious imager is the non-rotating helical focuser. As you turn the focuser to achieve a sharp image of your guide star, the camera and its sensor do not rotate. This prevents the guide field from shifting, which would otherwise force you to recalibrate your guiding software after every focus adjustment. The focuser accepts accessories via its 1.25\" opening or a more secure, direct T2-thread connection.\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\u003eRigid Mounting: The PrimaLuceLab PLUS Ring System\u003c\/h3\u003e\n\u003cp\u003eIncluded with the scope are a pair of PrimaLuceLab's 80mm PLUS guide rings, which are central to the system's stability. These rings bolt directly to any PLUS-compatible dovetail bar, creating a solid, flex-free connection that eliminates a common source of guiding errors. Three nylon-tipped screws in each ring provide a firm grip on the optical tube without scratching its finish, ensuring your setup is both secure and pristine.\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\"\u003eWhat makes the PrimaLuceLab CompactGuide Scope's helical focuser better for autoguiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe PrimaLuceLab CompactGuide Scope features a \u003cstrong\u003enon-rotating helical focuser\u003c\/strong\u003e. This means your guide camera and its field of view do not turn as you adjust focus, preventing guide star drift and eliminating the need to recalibrate your autoguiding software after each focus touch-up.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the PrimaLuceLab 60mm CompactGuide Scope as a visual finder?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes\u003c\/strong\u003e, it is designed for dual use. By inserting a standard 1.25\" eyepiece using the included extension tube, it functions as a high-quality optical finder for locating and centering celestial objects before imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the included PLUS guide rings attach to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe PLUS rings are part of PrimaLuceLab's modular system. They are designed to bolt directly to \u003cstrong\u003ePLUS dovetail bars\u003c\/strong\u003e or other compatible accessories, ensuring a rigid, flex-free connection. This seamless integration is ideal for connecting to other PrimaLuceLab hardware like the EAGLE computer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of cameras can I connect to the PrimaLuceLab CompactGuide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe focuser is versatile, accepting any guide camera with a standard \u003cstrong\u003e1.25\" nosepiece\u003c\/strong\u003e. For a more secure, threaded connection that eliminates any possibility of sag, you can also attach cameras that use a standard \u003cstrong\u003eT2-thread\u003c\/strong\u003e directly to the focuser body.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the PrimaLuceLab CompactGuide Scope to guide on the Andromeda Galaxy (M31) with my refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would mount the CompactGuide Scope onto your main refractor using the PLUS rings. After connecting your guide camera, you would slew to M31, select a suitable guide star in the field of view, and focus it using the non-rotating helical focuser. Its optical system is well-suited for finding bright guide stars around large deep-sky targets like the Andromeda Galaxy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Schmidt-Cassegrain telescope and want to guide on Jupiter. Is the PrimaLuceLab CompactGuide Scope a good choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes\u003c\/strong\u003e. For planetary imaging with an SCT, precise guiding is crucial to resolve fine detail. You would mount the CompactGuide Scope, find a star near Jupiter, and let your autoguiding software make corrections. The rigid PLUS rings will prevent differential flexure, which is a critical concern when imaging at the long focal lengths typical of an SCT.\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\u003eid\u003c\/td\u003e\n\u003ctd\u003e#product-snippet-id\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\u003c\/ul\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\/PrimaLuceLab_60mm_CompactGuide_Scope_with_PLUS_80mm_Guide_Rings_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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/primalucelab-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePrimaLuceLab 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PrimaLuceLab","offers":[{"title":"Default Title","offer_id":44967872692509,"sku":"PLL-PLLCG60","price":259.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PrimaLuceLab-60mm-CompactGuide-scope-with-PLUS-80mm-guide-rings__79140.1647281434.1280.1280.jpg?v=1684346316"},{"product_id":"primalucelab-guide-rings-plus-80mm","title":"PrimaLuceLab Guide Rings PLUS 80mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Internal Diameter\u003c\/li\u003e\n\u003cli\u003ePrimaLuceLab PLUS System Compatible\u003c\/li\u003e\n\u003cli\u003eCNC-Machined Aluminum Construction\u003c\/li\u003e\n\u003cli\u003eHard-Anodized Finish\u003c\/li\u003e\n\u003cli\u003eThree-Point Adjustment Screws with Nylon Tips\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\u003eDownloads\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\u003ePrimaLuceLab Guide Rings PLUS 80mm\u003c\/h2\u003e\n\u003cp\u003eThe PrimaLuceLab Guide Rings PLUS 80mm offer a high-precision mounting platform for guide scopes and finders with an 80mm outer diameter. CNC-machined from a single block of aluminum, these 80mm rings integrate seamlessly into the PrimaLuceLab PLUS ecosystem for a rigid, zero-flexure setup.\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\u003eCNC-Machined 80mm Rings for Zero-Flexure Guiding\u003c\/h3\u003e\n\u003cp\u003eDifferential flexure is the primary source of poor guiding. These 80mm rings combat this by using a high-precision manufacturing process, where each ring is machined from a solid block of aluminum. This ensures perfect roundness and structural integrity that cast or bent metal rings cannot match.\u003c\/p\u003e\n\u003cp\u003eThe aluminum is then sandblasted for a smooth finish and hard-anodized to increase surface durability and prevent corrosion. Each ring includes three adjustment screws with nylon tips, allowing you to securely center your guide scope without marring its finish, ensuring your autoguiding system remains perfectly aligned with your main telescope all night.\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\u003eMultiple Mounting Options for the 80mm PLUS Rings\u003c\/h3\u003e\n\u003cp\u003eAs a core component of the PrimaLuceLab PLUS (Prima Luce Universal System), these 80mm rings are designed for maximum compatibility within the ecosystem. They feature threaded holes that allow direct, rigid connection to other PLUS components without the instability of stacked adapters.\u003c\/p\u003e\n\u003cp\u003eYou can mount the 80mm rings directly on top of an EAGLE computer, a PLUS dovetail plate, or PLUS support rings. For users with equipment outside the PrimaLuceLab system, a central threaded hole provides a secure connection point for attaching the rings to third-party plates or accessories using a single screw.\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\"\u003eWhat is the internal diameter of the PrimaLuceLab PLUS Guide Rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThese guide rings are designed to hold a telescope tube with an outer diameter of \u003cstrong\u003e80mm\u003c\/strong\u003e. They are ideal for many 50mm and 60mm guide scopes, as well as some larger optical finders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount the PrimaLuceLab PLUS 80mm Guide Rings to an EAGLE computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can install the 80mm guide rings directly onto the top of any EAGLE model. The rings are designed to be attached using the included plates and screws, providing a solid, flat base for a secure connection without any flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use these 80mm guide rings with a non-PrimaLuceLab dovetail plate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While designed for the PLUS system, each 80mm ring includes a central threaded hole. This allows you to mount the rings to a third-party dovetail plate or support ring using a standard screw, offering broad compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the PrimaLuceLab PLUS 80mm rings made of?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe rings are \u003cstrong\u003eCNC-machined from a solid block of aluminum\u003c\/strong\u003e. This process ensures high precision and rigidity. They are then sandblasted for a smooth surface and hard-anodized to protect against scratches and oxidation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill these 80mm rings fit a 60mm guide scope like the PrimaLuceLab CompactGuide?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The 80mm internal diameter is the correct size to accommodate the 80mm PLUS guide rings that come standard with the 60mm CompactGuide scope, or if you are mounting a similar guide scope directly. The three-point adjustment screws allow you to securely center the guide scope inside the rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the PLUS system for these 80mm guide rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe PLUS system is a modular ecosystem of plates, rings, and clamps that connect together with multiple screws, not just one. For the 80mm guide rings, this means you can create a completely rigid imaging train from your main telescope to your guide scope, eliminating a common source of flexure that can ruin long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/primalucelab-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePrimaLuceLab 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PrimaLuceLab","offers":[{"title":"Default Title","offer_id":44967872987421,"sku":"PLL-PLLANGU80P","price":91.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PrimaLuceLab-Guide-rings-PLUS-80mm__22542.1641520661.1280.1280.jpg?v=1684346318"},{"product_id":"primalucelab-guide-rings-plus-115mm","title":"PrimaLuceLab Guide Rings PLUS 115mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e115mm Internal Diameter\u003c\/li\u003e\n\u003cli\u003eCNC-Machined Aluminum Construction\u003c\/li\u003e\n\u003cli\u003eHard Anodized Red Finish\u003c\/li\u003e\n\u003cli\u003ePart of the PrimaLuceLab PLUS System\u003c\/li\u003e\n\u003cli\u003eDesigned for Parallel Guide Scopes\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\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\u003ePrimaLuceLab Guide Rings PLUS 115mm\u003c\/h2\u003e\n      \u003cp\u003eThe PrimaLuceLab Guide Rings PLUS 115mm provide a rock-solid mounting platform for parallel guide scopes. Machined from a single aluminum block for maximum rigidity, these rings are fully integrated into the modular PLUS ecosystem to deliver zero-flexure performance for precise autoguiding.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eRobust Construction: CNC Machining and Hard Anodizing\u003c\/h3\u003e\n      \u003cp\u003eEach PLUS 115mm guide ring is CNC-machined from a solid block of aluminum, ensuring high mechanical precision and structural integrity. The surface is sandblasted for a smooth finish and then hard-anodized, a process that significantly increases the material's hardness and protects it from oxidation and scratching, even in harsh field conditions.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003ePLUS System Integration: A Foundation for Rigid Guiding\u003c\/h3\u003e\n      \u003cp\u003eAs a core component of the Prima Luce Universal System (PLUS), these guide rings are designed for maximum rigidity and modularity. They feature threaded holes that allow for a secure two-screw attachment to other PLUS elements like support rings and dovetail clamps, completely eliminating any possibility of rotation that can ruin a long exposure.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNative PLUS Connection:\u003c\/strong\u003e Attaches directly to PLUS dovetail plates and support rings for a perfectly stable, integrated guiding system.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCross-Brand Compatibility:\u003c\/strong\u003e A series of central slots allows you to mount the rings on plates or support rings from other brands using a standard screw.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eEasy Balancing:\u003c\/strong\u003e When mounted on a PLUS dovetail plate, you can slide the rings forward or backward to achieve perfect balance with your guide scope.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the PrimaLuceLab PLUS 115mm rings?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe PLUS 115mm rings are designed to securely mount a guide telescope parallel to your main imaging telescope. Their 115mm internal diameter is suitable for guide scopes such as 80mm class refractors, providing a rigid connection essential for accurate autoguiding.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the PLUS 115mm rings connect to telescopes that don't use the PLUS system?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor compatibility with third-party hardware, the rings include central slots. This allows you to attach them to virtually any dovetail plate or support ring from other manufacturers using a single, centrally located screw.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the benefits of the PrimaLuceLab PLUS system for mounting a guide scope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe PLUS system's main advantage is its rigidity. By using multiple screws for connections between components, it prevents any twisting or rotation between the guide scope and the main telescope. This modular system allows you to build a completely rigid and customized imaging train with plates, rings, and clamps that all work together seamlessly.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI'm concerned about flexure in my guiding setup. How do the PLUS 115mm rings help prevent this?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFlexure is minimized in two ways. First, the rings themselves are machined from a single block of aluminum, making them inherently stiff. Second, when connected to another PLUS component (like a dovetail plate) using the dedicated two-screw mounting points, they form a connection that cannot rotate or shift, which is a common source of differential flexure in guiding setups that rely on a single screw.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat materials are used for the PrimaLuceLab PLUS 115mm rings?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe rings are made from high-precision CNC-machined aluminum. They are then sandblasted for a uniform surface and finished with a hard anodizing process that provides a durable, scratch-resistant, and corrosion-resistant red finish.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I adjust the balance of my guide scope when using the PLUS 115mm rings on a PLUS dovetail plate?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. When you attach the PLUS 115mm rings to a PLUS dovetail plate mounted on your main telescope, you can slide the rings along the length of the plate before tightening them down. This allows you to find the perfect position to balance the weight of your guide camera and scope, improving the tracking of your mount.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInternal Diameter\u003c\/td\u003e\n\u003ctd\u003e115mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSystem\u003c\/td\u003e\n\u003ctd\u003ePrimaLuceLab PLUS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCNC-Machined Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eHard Red Anodizing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/primalucelab-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePrimaLuceLab 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PrimaLuceLab","offers":[{"title":"Default Title","offer_id":44967873118493,"sku":"PLL-PLLANGU115P","price":147.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PrimaLuceLab-Guide-rings-PLUS-115mm__46013.1641520673.1280.1280.jpg?v=1684346333"},{"product_id":"primalucelab-guide-scope-support-for-ecco","title":"PrimaLuceLab Guide Scope Support for ECCO","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds a finder or guide scope support to the PrimaLuceLab ECCO\u003c\/li\u003e\n\u003cli\u003eReplaces the need for separate guide rings\u003c\/li\u003e\n\u003cli\u003eIdeal for small, portable apochromatic refractors\u003c\/li\u003e\n\u003cli\u003eCreates a compact and integrated imaging setup\u003c\/li\u003e\n\u003cli\u003eAll-metal construction for rigidity\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\u003ePrimaLuceLab Guide Scope Support for ECCO\u003c\/h2\u003e\n\u003cp\u003eThe PrimaLuceLab Guide Scope Support for ECCO is a dedicated, all-metal accessory designed to integrate your guide scope or finder directly with your ECCO environmental controller. This support eliminates the need for separate guide rings, creating a more compact, rigid, and streamlined astrophotography setup that is perfectly suited for portable telescopes.\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\u003eA Direct Mounting Solution for Your PrimaLuceLab ECCO\u003c\/h3\u003e\n\u003cp\u003eBy installing this support onto the metal chassis of your ECCO, you create a secure and stable platform for your guiding system. This approach is an excellent solution for small apochromatic refractors and other portable imaging rigs where minimizing weight, complexity, and potential flexure points is a top priority.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Mounting:\u003c\/strong\u003e Securely attaches a guide scope or finder directly to the top of the ECCO unit, keeping your optical train compact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces Guide Rings:\u003c\/strong\u003e Removes the need for a separate set of guide rings and dovetail, reducing the overall weight and number of components in your setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for Portability:\u003c\/strong\u003e Helps build a clean, travel-friendly imaging system by consolidating hardware and simplifying cable management around the focuser.\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 is the purpose of the PrimaLuceLab Guide Scope Support for ECCO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis support is an optional accessory that allows you to mount a finder or a small guide scope directly onto your PrimaLuceLab ECCO (Environmental Computerized COntroller). It provides a secure, integrated mounting point without needing separate guide rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich PrimaLuceLab device is the Guide Scope Support for ECCO designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis support is designed exclusively for the PrimaLuceLab ECCO and ECCO2. It attaches directly to the all-metal body of the environmental controller unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the PrimaLuceLab Guide Scope Support for ECCO instead of traditional guide rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This support is designed to replace traditional guide rings. This is particularly useful for highly portable setups where you want to minimize weight and components. Note that it provides a fixed mounting point, unlike the fine directional adjustments possible with some guide ring systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope setup benefits most from the Guide Scope Support for ECCO?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSmall, portable apochromatic refractors are the ideal use case. For these instruments, the ability to mount a lightweight guide scope directly above the focuser and ECCO unit creates an extremely compact and rigid imaging package that is easy to transport and set up.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Guide Scope Support for ECCO help with my portable 80mm refractor setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor an 80mm refractor, this support helps you build a cleaner, more integrated rig. By mounting your guide scope onto the ECCO, you consolidate hardware around the focuser, simplify cable routing, and reduce the number of potential failure or flexure points, making your portable system more reliable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Guide Scope Support for ECCO come with the ECCO unit itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Guide Scope Support is an optional accessory and is sold separately from the ECCO and ECCO2 units.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/primalucelab-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePrimaLuceLab 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PrimaLuceLab","offers":[{"title":"Default Title","offer_id":44967874003229,"sku":"PLL-ECCOSUP","price":111.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PrimaLuceLab-Guide-scope-support-for-ECCO__81414.1641520685.1280.1280.jpg?v=1684346347"},{"product_id":"pegasus-indigo-oag","title":"Pegasus Indigo OAG","description":"\u003c!-- more --\u003ePegasus Indigo OAG","brand":"Pegasus Astro","offers":[{"title":"Default Title","offer_id":44968071364893,"sku":"PEG-INDIGOOAG","price":266.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Pegasus-Indigo-OAG__99783.1673386518.1280.1280.jpg?v=1684348669"},{"product_id":"askar-32mm-f4-guide-scope","title":"Askar 32mm F4 Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e32mm Aperture\u003c\/li\u003e\n\u003cli\u003e128mm Focal Length (f\/4)\u003c\/li\u003e\n\u003cli\u003eContains One ED Glass Element\u003c\/li\u003e\n\u003cli\u003ePrecision Helical Focuser\u003c\/li\u003e\n\u003cli\u003eWeighs only 303g\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\u003eDownloads\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 32mm F4 Guide Scope\u003c\/h2\u003e\n\u003cp\u003eThe Askar 32mm F4 Guide Scope packs precise optical design into a compact, 303g package ideal for portable astrophotography rigs. Its 32mm objective lens operates at a fast f\/4 focal ratio, delivering bright star fields to your guide camera. The 128mm focal length provides an effective image scale for accurate guiding with a wide range of imaging telescopes, from wide-field refractors to larger SCTs.\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\u003e32mm f\/4 ED Optics: Bright Stars for Accurate Guiding\u003c\/h3\u003e\n\u003cp\u003eFinding a suitable guide star is made simple with the scope's fast f\/4 optical system, which gathers ample light to make stars visible even in short exposures. The objective lens includes a piece of Extra-low Dispersion (ED) glass, which significantly reduces chromatic aberration. This ensures guide stars are rendered as sharp, tight points of light, allowing your autoguiding software to calculate a more accurate centroid for sub-pixel tracking precision.\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 Mechanics: 303g Body and 20mm Helical Focuser\u003c\/h3\u003e\n\u003cp\u003eWeighing just 303g, this guidescope adds minimal load to your mount, making it a perfect match for portable setups and star trackers where every gram counts. Focus is achieved via a non-rotating helical focuser that provides 20mm of travel. This mechanism allows for smooth, precise adjustments to achieve critical focus without any image shift, ensuring your guide camera remains perfectly aligned.\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\u003eFlexible Connectivity: 1.25\" and M42 Camera Support\u003c\/h3\u003e\n\u003cp\u003eThe Askar 32mm F4 Guide Scope is designed for broad compatibility with modern guide cameras. The focuser terminates in a standard 1.25\" holder for push-fit cameras and accessories. For a more secure, threaded connection, it also features a male M42x0.75 thread, accommodating nearly all guide cameras from major brands like ZWO and QHY.\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\"\u003eWhat makes the Askar 32mm F4 Guide Scope's ED glass important for autoguiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eED glass element\u003c\/strong\u003e corrects for chromatic aberration, or color fringing. This creates sharper, more focused guide stars. Guiding software works by finding the exact center (centroid) of a star, and a tighter star profile without color bleed allows for more precise calculations and, ultimately, better tracking accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the Askar 32mm F4 Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe scope uses a \u003cstrong\u003ehelical focuser\u003c\/strong\u003e. You simply rotate the knurled ring on the barrel to move the camera forward or backward. This design is very precise and prevents the camera from rotating, maintaining the orientation of your guide field. It offers 20mm of travel to accommodate various cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 303g weight of the Askar 32mm F4 Guide Scope suitable for a portable setup like a Sky-Watcher Star Adventurer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. At just \u003cstrong\u003e303g\u003c\/strong\u003e, it's one of the lighter guide scopes available. This minimal weight is a significant advantage for payload-limited setups like star trackers, as it leaves more capacity for your main camera and lens while reducing the chance of tracking errors caused by overloading the mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat types of guide cameras are compatible with the Askar 32mm F4 Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis guidescope is compatible with almost any standard autoguiding camera. It provides two connection methods:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" Barrel:\u003c\/strong\u003e For cameras that slide in like an eyepiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42x0.75 Thread:\u003c\/strong\u003e For cameras that use a T-thread connection, ensuring a rigid, tilt-free attachment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Askar 32mm F4 Guide Scope work with my 10\" f\/8 Ritchey-Chrétien telescope to guide on faint targets like the Triangulum Galaxy (M33)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e128mm focal length\u003c\/strong\u003e provides a good image scale for guiding long focal length telescopes like an RC or SCT. More importantly, the fast \u003cstrong\u003ef\/4 focal ratio\u003c\/strong\u003e is a major benefit in these situations, as it helps pull in fainter guide stars from the sparse star fields often found around distant galaxies, increasing your chances of finding a suitable star anywhere you point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the f\/4 focal ratio on the Askar 32mm F4 Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of an \u003cstrong\u003ef\/4 focal ratio\u003c\/strong\u003e is brightness. It concentrates starlight more effectively onto your guide camera's sensor compared to a slower scope (e.g., f\/6 or f\/7). This allows you to use shorter guide exposures, which leads to more responsive and accurate corrections from your mount.\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\u003e32mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e128mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eAir-spaced design with one ED element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eHelical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" holder and M42x0.75 male thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e303g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Colors\u003c\/td\u003e\n\u003ctd\u003eBlack, Silver\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software \u0026amp; Drivers\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\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":"Black","offer_id":46861843366173,"sku":"ASK-ASKAR32GS-BK","price":150.0,"currency_code":"CAD","in_stock":true},{"title":"Silver","offer_id":46861843530013,"sku":"ASK-ASKAR32GS-SV","price":150.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-32mm-Guide-scope.png?v=1697491395"},{"product_id":"askar-52mm-f4-guide-scope","title":"Askar 52mm F4 Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAperture: 52mm\u003c\/li\u003e\n\u003cli\u003eFocal Length: 208mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio: f\/4\u003c\/li\u003e\n\u003cli\u003eFocuser: Helical with 25mm travel\u003c\/li\u003e\n\u003cli\u003eWeight: 631g\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\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\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 52mm F4 Guide Scope\u003c\/h2\u003e\n      \u003cp\u003eThe Askar 52mm F4 Guide Scope combines a 52mm aperture with a fast 208mm focal length, delivering a bright image field essential for reliable multi-star guiding. Its optical design includes one element of Extra-Low Dispersion (ED) glass for sharp, high-contrast guide stars, and the entire assembly weighs just 631g.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e52mm f\/4 ED Optics for Precision Guiding\u003c\/h3\u003e\n      \u003cp\u003eWith a 52mm objective, this guidescope gathers significantly more light than standard 30mm finders, revealing fainter stars even in sparse regions of the sky. The fast f\/4 focal ratio allows your guide camera to use shorter exposures, enabling more rapid and responsive corrections to tracking errors from your mount.\u003c\/p\u003e\n      \u003cp\u003eThe inclusion of an ED glass element minimizes chromatic aberration, ensuring guide stars are rendered as tight, focused points of light. This improves the accuracy of centroid calculations in your guiding software, allowing for the sub-pixel precision required for imaging with long focal length instruments.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e25mm Helical Focuser with M42 \u0026amp; 1.25\" Outputs\u003c\/h3\u003e\n      \u003cp\u003eAchieving and maintaining sharp focus is critical for autoguiding. The Askar 52mm scope features a precision helical focuser with 25mm of travel, providing smooth, exact adjustments without image shift or rotation. This range is sufficient to bring a wide variety of guide cameras to a sharp focus.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eM42 Male Thread:\u003c\/strong\u003e Provides a direct, rigid connection for cameras equipped with a corresponding female M42x0.75 thread, eliminating any potential for flexure.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1.25\" Adapter:\u003c\/strong\u003e Ensures universal compatibility with the vast majority of standard astronomy guide cameras that use a 1.25\" nosepiece.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat guide cameras are compatible with the Askar 52mm F4 Guide Scope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Askar 52mm F4 Guide Scope is highly compatible, offering two connection methods. You can use any guide camera with a standard \u003cstrong\u003e1.25\" nosepiece\u003c\/strong\u003e via the included adapter, or you can directly thread on any camera that has female \u003cstrong\u003eM42x0.75 T-threads\u003c\/strong\u003e for a more secure connection.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is ED glass important in a guidescope like the Askar 52mm?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eExtra-Low Dispersion (ED) glass\u003c\/strong\u003e corrects for chromatic aberration, or color fringing. In a guidescope, this means stars appear as tighter, more focused points without blue or purple halos. Guiding software can calculate the center of a sharp star more accurately, leading to more precise tracking corrections.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar 52mm F4 Guide Scope perform when guiding a 10\" SCT on a faint target?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003e52mm aperture\u003c\/strong\u003e is a significant advantage in this scenario. Compared to smaller 30mm guidescopes, it gathers much more light, allowing you to find suitable guide stars even when pointed at faint objects far from the galactic plane. The f\/4 speed also allows for short, sensitive exposures, which is crucial for making the rapid corrections needed to guide a long focal length telescope like an SCT.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of a helical focuser on the Askar 52mm Guide Scope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA helical focuser provides very fine, precise focus control by twisting the barrel. Unlike a simple sliding tube, it allows for minute adjustments that are repeatable and hold their position securely once set. This ensures your guide stars remain perfectly sharp throughout an imaging session.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar 52mm F4 as a wide-field finder scope with a 1.25\" eyepiece?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. With its 208mm focal length and the included 1.25\" adapter, the Askar 52mm F4 doubles as an excellent, high-quality optical finder. Paired with a low-power 1.25\" eyepiece, it will provide bright, wide-field views to help you locate and center objects in your main telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow much does the Askar 52mm Guide Scope weigh and will it affect my mount's balance?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe scope weighs \u003cstrong\u003e631g\u003c\/strong\u003e. While heavier than entry-level 30mm guidescopes, this weight is manageable for most equatorial mounts capable of astrophotography. It's a necessary trade-off for the superior light-gathering of the 52mm aperture. Always ensure your system is properly balanced after adding any new equipment.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\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\u003e208mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e1x ED Glass Element\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eHelical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOutput Connections\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 Male Thread, 1.25\" Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e631g\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAvailable Colors\u003c\/td\u003e\n\u003ctd\u003eBlack, Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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_52mm_F4_Guide_Scope_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\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\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":"Black","offer_id":49024014975261,"sku":"ASK-ASKAR52GS-BK","price":276.0,"currency_code":"CAD","in_stock":true},{"title":"Silver","offer_id":49024014942493,"sku":"ASK-ASKAR52GS-SV","price":276.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-52mm-f4-Guide-scope-1.jpg?v=1723301881"},{"product_id":"dav-guide-50","title":"David Astro 50mm Guide Scope","description":"\u003c!-- more --\u003e\n\nThe 50mm Guide Scope with a 190mm focal length is designed for precise tracking during astrophotography and deep-sky observation. Its compact and lightweight build offers a wide field of view, making it easy to locate guide stars while maintaining accurate alignment for long exposures. The 50mm aperture delivers bright, sharp images, and the 190mm focal length provides the perfect balance of magnification and field coverage. Compatible with most telescopes and mounts, this guide scope enhances performance without adding significant weight, making it an essential tool for capturing detailed celestial images.","brand":"David Astro","offers":[{"title":"Default Title","offer_id":49171614990621,"sku":"DAV-GUIDE-50","price":110.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/DAV-GUIDE-50_af6c0d52-a246-402b-bc4d-9e82c92d4426.jpg?v=1726769984"},{"product_id":"dav-guide-60","title":"David Astro 60mm Guide Scope","description":"\u003c!-- more --\u003e\n\nThe 60mm Guide Scope with a 240mm focal length is designed for precise tracking during astrophotography and deep-sky observation. Its compact and lightweight build offers a wide field of view, making it easy to locate guide stars while maintaining accurate alignment for long exposures. The 60mm aperture delivers bright, sharp images, and the 240mm focal length provides the perfect balance of magnification and field coverage. Compatible with most telescopes and mounts, this guide scope enhances performance without adding significant weight, making it an essential tool for capturing detailed celestial images.","brand":"David Astro","offers":[{"title":"Default Title","offer_id":49171615056157,"sku":"DAV-GUIDE-60","price":130.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/DAV-GUIDE-60_fdcb2992-d45f-4afa-b8af-08ae36dccf38.jpg?v=1726770395"},{"product_id":"zwo-30mm-f-5-apo-guide-scope","title":"ZWO 30mm f\/5 APO Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e30mm Aperture\u003c\/li\u003e\n\u003cli\u003e150mm Focal Length (f\/5.0)\u003c\/li\u003e\n\u003cli\u003eTriplet Apochromatic (APO) Lens Design\u003c\/li\u003e\n\u003cli\u003ePrecise Helical Focuser\u003c\/li\u003e\n\u003cli\u003eLightweight at 0.77 lb.\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\u003eDownloads\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\u003eZWO 30mm f\/5 APO Guide Scope\u003c\/h2\u003e\n\u003cp\u003eThe ZWO 30mm f\/5 APO Guide Scope integrates a 150mm focal length with a triplet apochromatic lens design into a compact package weighing just 0.77 lb. Its 30mm f\/5.0 optical system is engineered to produce sharp, color-free guide stars, providing the high-precision data needed for accurate tracking with imaging telescopes.\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\u003eTriplet APO Optics at 150mm Focal Length\u003c\/h3\u003e\n\u003cp\u003eUnlike standard achromatic guide scopes, this scope's triplet lens design corrects for chromatic aberration, rendering guide stars as tight, focused points of light without color fringing. This optical correction allows autoguiding software to calculate a more accurate centroid, which translates directly to tighter, rounder stars in your final image. The 150mm focal length provides enough image scale to effectively guide primary imaging telescopes up to 750mm in focal length.\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\u003ePrecise Helical Focuser at Just 0.77 lb.\u003c\/h3\u003e\n\u003cp\u003eAchieving and maintaining sharp focus on your guide star is non-negotiable for accurate guiding. This scope features a non-rotating helical focuser with a locking screw, allowing you to make fine adjustments and then secure the focus position against accidental bumps or temperature shifts. The entire optical tube assembly weighs only 0.77 lb., adding minimal load to your mount and making it easy to balance your entire imaging rig.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Threaded Connection:\u003c\/strong\u003e The rear of the focuser includes M42x0.75 T-threads, allowing you to securely attach any ZWO ASI camera for a rigid, flex-free connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25\" Compatibility:\u003c\/strong\u003e For cameras with a 1.25\" nosepiece, a standard compression ring holder provides a secure grip without marring the barrel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSynta-Style Mounting:\u003c\/strong\u003e The included dovetail bar fits standard finder shoes on most telescopes, making it a simple drop-in replacement or addition to your setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eZWO 30mm f\/5 APO vs. the Original 30mm f\/4\u003c\/h3\u003e\n\u003cp\u003eWhile the original ZWO 30mm f\/4 guide scope is a capable and compact option, the f\/5 APO model is a significant optical upgrade. The primary differences lie in the optical design and focal length, which directly impact guiding accuracy with longer telescopes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Design:\u003c\/strong\u003e The older f\/4 model uses an achromatic doublet design, which can exhibit minor color fringing on bright stars. The f\/5 APO uses a triplet lens system to virtually eliminate this, producing sharper stars for more precise centroid calculations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Length:\u003c\/strong\u003e The f\/5 APO's longer 150mm focal length provides a more detailed view of guide stars compared to the 120mm of the f\/4 model. This increased image scale allows for more accurate guiding corrections, especially when paired with longer focal length imaging scopes.\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 is the main advantage of the ZWO 30mm f\/5 APO over the older f\/4 model?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is the \u003cstrong\u003etriplet apochromatic (APO) optical design\u003c\/strong\u003e. This provides significantly better color correction, resulting in sharper guide stars. Sharper stars allow your guiding software to make more precise calculations, leading to better tracking accuracy and rounder stars in your long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the maximum focal length I can effectively guide with the ZWO 30mm f\/5 scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA common rule of thumb is that your guide scope's focal length should be at least 1\/5th that of your imaging telescope. With its \u003cstrong\u003e150mm focal length\u003c\/strong\u003e, the ZWO 30mm f\/5 is an excellent match for imaging telescopes up to approximately 750mm in focal length, making it ideal for wide-field refractors and smaller Newtonian reflectors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the ZWO 30mm f\/5 guide scope for visual observing or as a finder?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While designed for autoguiding, its high-quality triplet optics make it a superb finderscope. When paired with a 1.25\" eyepiece (sold separately), the 30mm aperture and 150mm focal length provide a bright, wide field of view for locating objects. It essentially functions as a premium, straight-through finder.\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 30mm f\/5 scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ZWO ASI120MM Mini and other ZWO cameras with 1.25\" bodies are designed for this scope. You simply insert the camera's 1.25\" barrel into the back of the guide scope and secure it with the thumbscrews. For a threaded connection, you can unthread the 1.25\" holder to reveal the M42x0.75 threads underneath.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow well will this 30mm f\/5 guide a Celestron EdgeHD 800 at f\/10?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn 8\" EdgeHD has a focal length of 2032mm. The 150mm focal length of this guide scope is shorter than ideal for such a long imaging focal length. While it can work, for optimal results with an SCT, an Off-Axis Guider (OAG) or a guide scope with a longer focal length (e.g., 250mm or more) is generally recommended to better match the image scale.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ZWO 30mm f\/5 a good match for a RedCat 51 imaging setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The RedCat 51 has a focal length of 250mm. The 150mm focal length of the ZWO 30mm f\/5 is an excellent match, easily providing the resolution needed for precise guiding. Its low 0.77 lb. weight is also a perfect fit for the lightweight RedCat, ensuring the entire system remains easy to balance on a portable mount.\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\u003eSKU Number\u003c\/td\u003e\n\u003ctd\u003eZWO-30F5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003eTriplet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.77 lb.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e6 in.\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\"\u003eZWO 30mm f\/5 Mini Guide Scope\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\"\u003eSynta-Style Dovetail\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\"\u003eM4x8 Screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\"\u003eM3x6 Screw\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":49803563270429,"sku":"ZWO-30F5","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ZWO-30F5-1.jpg?v=1742412986"},{"product_id":"player-one-fhd-oag-max","title":"Player One FHD-OAG MAX","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLarge 8mm x 14mm Pick-off Prism\u003c\/li\u003e\n\u003cli\u003eWide 16:9 Format Matches Modern Guide Sensors\u003c\/li\u003e\n\u003cli\u003eDesigned for Player One MAX Filter Drawer\u003c\/li\u003e\n\u003cli\u003eSupports Poseidon, Zeus, and Artemis Series Cameras\u003c\/li\u003e\n\u003cli\u003eOptimized to eliminate vignetting with the Xena-M Camera\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\u003eDownloads\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\u003ePlayer One FHD-OAG MAX Off-Axis Guider\u003c\/h2\u003e\n\u003cp\u003eThe Player One FHD-OAG MAX is an off-axis guider built around a large 8mm x 14mm prism to maximize guide star availability for large-sensor cameras. Its rectangular prism provides a field close to a 16:9 format, matching the sensor shape of modern guide cameras and increasing the odds of capturing a suitable star without rotating the assembly. The prism's 8mm height allows it to intercept more light from the telescope's optical path, a critical advantage for reliable guiding with Player One's Poseidon, Zeus, and Artemis series cameras.\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\u003e8x14mm Prism: A 16:9 Format for Wide Guide Fields\u003c\/h3\u003e\n\u003cp\u003eThe core of the FHD-OAG MAX is its oversized 8mm x 14mm pick-off prism. This rectangular shape creates a wide field of view for your guide camera, significantly increasing the probability of finding a bright guide star in any target area. The prism's dimensions, approximating a 16:9 aspect ratio, are a perfect match for the wide-format CMOS sensors used in many modern guide cameras.\u003c\/p\u003e\n\u003cp\u003eWith an 8mm prism height, the FHD-OAG MAX can be positioned closer to the center of the light path. This allows it to gather more light and produce brighter guide stars, especially in systems with fast focal ratios where the light cone is steep. This design is specifically engineered to deliver a fully illuminated, non-vignetted image to the Player One Xena-M camera, ensuring your guiding is precise and consistent.\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\u003eDesigned for the Player One Ecosystem\u003c\/h3\u003e\n\u003cp\u003eThis OAG is not a generic accessory; it is engineered for seamless integration with the Player One imaging system. The FHD-OAG MAX is designed to connect directly with the Player One Filter Drawer MAX and Phoenix series filter wheels (7x36mm, 7x2\", 7x50mm, and 5x2\"), ensuring correct spacing and a rigid connection without third-party adapters.\u003c\/p\u003e\n\u003cp\u003eIt is the recommended off-axis guider for Player One's large-format cooled cameras, including the Poseidon, Zeus, and Artemis series. By creating a fully integrated imaging train with Player One components, you eliminate potential sources of flexure and tilt, leading to sharper stars across the entire field of your main imaging camera.\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\"\u003eWhat makes the Player One FHD-OAG MAX different from other OAGs?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is its large, rectangular \u003cstrong\u003e8mm x 14mm prism\u003c\/strong\u003e. This provides a wide, 16:9 format field of view that is better suited for finding guide stars with modern CMOS guide cameras compared to smaller, square prisms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich Player One cameras is the FHD-OAG MAX designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FHD-OAG MAX is optimized for Player One's large-format cooled cameras. This includes the \u003cstrong\u003ePoseidon series, Zeus series, and Artemis series\u003c\/strong\u003e. It is also confirmed to provide a non-vignetted guide field for the \u003cstrong\u003eXena-M camera\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the FHD-OAG MAX with a Player One filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is designed for direct integration. The FHD-OAG MAX is compatible with the \u003cstrong\u003ePlayer One Filter Drawer MAX\u003c\/strong\u003e and the \u003cstrong\u003ePhoenix series filter wheels\u003c\/strong\u003e, including the 7x36mm, 7x2\", 7x50mm, and 5x2\" models. This ensures correct back focus and a secure mechanical connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the FHD-OAG MAX help with finding guide stars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe large \u003cstrong\u003e14mm width\u003c\/strong\u003e of the prism creates a larger search area for your guide camera. This means you are more likely to find a suitable guide star within the field of view without having to rotate your entire imaging train to hunt for one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the FHD-OAG MAX vignette my guide camera sensor in a fast telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe OAG is designed to minimize vignetting. Because the \u003cstrong\u003e8mm prism height\u003c\/strong\u003e allows it to sit closer to the optical axis, it can intercept the light cone more effectively, even in faster systems. It is specifically noted to provide a \"no vignetting result\" when paired with the Player One Xena-M camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Player One Artemis-M Pro camera and a Phoenix 7x36mm wheel. Is the FHD-OAG MAX the right choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The Player One FHD-OAG MAX is the ideal choice for that combination. It is built to integrate perfectly with both the Artemis series cameras and the Phoenix 7x36mm filter wheel, creating a rigid and correctly spaced imaging train for autoguiding.\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\u003ePrism Size\u003c\/td\u003e\n\u003ctd\u003e8mm x 14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Format\u003c\/td\u003e\n\u003ctd\u003eApprox. 16:9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Compatibility\u003c\/td\u003e\n\u003ctd\u003ePoseidon, Zeus, Artemis series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Accessory Compatibility\u003c\/td\u003e\n\u003ctd\u003eFilter Drawer MAX, Phoenix Filter Wheels (7x36\/7x2\/7x50\/5x2)\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\"\u003ePlayer One FHD-OAG MAX\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\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51112116257053,"sku":"POA-OAG-MAX","price":278.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Player-One-FHD-OAG-MAX.png?v=1775159685"},{"product_id":"player-one-fhd-oag-mini","title":"Player One FHD-OAG MINI","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e8x14mm Pick-off Prism\u003c\/li\u003e\n\u003cli\u003e16:9 Aspect Ratio for FHD Sensors\u003c\/li\u003e\n\u003cli\u003eOptimized for Ares and Xena Series Cameras\u003c\/li\u003e\n\u003cli\u003eDesigned for Player One Filter Drawer MINI\u003c\/li\u003e\n\u003cli\u003eCompatible with Player One Phoenix 8x1.25 Filter Wheel\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\u003ePlayer One FHD-OAG MINI\u003c\/h2\u003e\n\u003cp\u003eThe Player One FHD-OAG MINI uses an oversized 8x14mm prism to fully illuminate modern guide cameras without vignetting. Its 16:9 aspect ratio is a perfect match for FHD sensors, while the short 8mm prism height allows it to intercept more light from the optical path for brighter, more reliable guide 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\u003e8x14mm Prism: Optimized for 16:9 Guide Sensors\u003c\/h3\u003e\n\u003cp\u003eThe core of the FHD-OAG MINI is its large 8x14mm pick-off prism. This design provides an illumination area that closely matches the 16:9 aspect ratio of modern CMOS guide sensors, ensuring the entire sensor is used effectively for finding and locking onto guide stars.\u003c\/p\u003e\n\u003cp\u003eWith an 8mm prism height, the pick-off mirror can be positioned closer to the center of the optical axis to gather more light. This is critical for finding suitable guide stars, especially when imaging through narrowband filters or in star-poor regions of the sky. This design ensures a bright, vignette-free view for guide cameras like the Player One Xena-M.\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\u003eDesigned for Phoenix 8x1.25 Wheels and MINI Filter Drawers\u003c\/h3\u003e\n\u003cp\u003eThis Off-Axis Guider is engineered to integrate seamlessly into the Player One accessory ecosystem. It is specifically designed for use with the Player One Filter Drawer MINI and the Phoenix 8x1.25 filter wheel, creating a compact and rigid imaging train.\u003c\/p\u003e\n\u003cp\u003eThe FHD-OAG MINI is the ideal guiding solution for Player One's Ares and planetary camera series. By placing the guider in front of the filters, it ensures that the guide camera receives the maximum amount of light possible, independent of which filter is being used for the main exposure.\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\"\u003eWhat is the benefit of the 8x14mm prism in the Player One FHD-OAG MINI?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe large \u003cstrong\u003e8x14mm prism\u003c\/strong\u003e provides a wide field of view for your guide camera, making it easier to find suitable guide stars. Its 16:9 aspect ratio is specifically designed to match modern Full-HD guide sensors, preventing vignetting and ensuring the entire sensor is illuminated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are compatible with the Player One FHD-OAG MINI?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FHD-OAG MINI is officially supported for use with Player One's \u003cstrong\u003eAres series\u003c\/strong\u003e and other \u003cstrong\u003eplanetary cameras\u003c\/strong\u003e used for guiding. It is confirmed to provide a non-vignetted guiding image for the \u003cstrong\u003eXena-M\u003c\/strong\u003e camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Player One FHD-OAG MINI work with my filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the FHD-OAG MINI is specifically designed for integration with the \u003cstrong\u003ePlayer One Phoenix 8x1.25 Filter Wheel\u003c\/strong\u003e and the \u003cstrong\u003ePlayer One Filter Drawer MINI\u003c\/strong\u003e. This allows you to guide using the full spectrum of light before it passes through your LRGB or narrowband filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the Player One FHD-OAG MINI use a 16:9 aspect ratio prism?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMany modern CMOS sensors used in guide cameras have a \u003cstrong\u003e16:9 \"widescreen\" format\u003c\/strong\u003e. A matching 16:9 prism ensures that light is delivered to the entire sensor surface, maximizing the available field for finding guide stars and preventing the corners of the sensor from being dark.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 8mm prism height of the FHD-OAG MINI help with guiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe short \u003cstrong\u003e8mm height\u003c\/strong\u003e allows the prism to be positioned closer to the main optical axis without shadowing the primary imaging sensor. This lets it intercept a brighter portion of the light cone, resulting in brighter guide stars and more reliable guiding, particularly with longer focal length telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Player One FHD-OAG MINI a good choice for my Ares-C camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The FHD-OAG MINI is an excellent match for cameras in the \u003cstrong\u003eAres series\u003c\/strong\u003e. It provides a robust guiding solution that integrates perfectly into a compact Player One imaging train, ensuring sharp, round stars in your final images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51112118419741,"sku":"POA-OAG-MINI","price":264.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Player-One-FHD-OAG-MINI.png?v=1775159893"},{"product_id":"player-one-100mm-mini-guiding-set","title":"Player One 100mm Mini Guiding Set","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCompact and lightweight guidescope solution\u003c\/li\u003e\n\u003cli\u003eDesigned for use with dedicated astronomy guide cameras\u003c\/li\u003e\n\u003cli\u003eEnables precise autoguiding for sharper, longer exposures\u003c\/li\u003e\n\u003cli\u003eIdeal for portable and wide-field imaging setups\u003c\/li\u003e\n\u003cli\u003eSimplifies the process of adding tracking correction to your mount\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\u003ePlayer One 100mm Mini Guiding Set\u003c\/h2\u003e\n\u003cp\u003eThe Player One 100mm Mini Guiding Set is engineered as a dedicated, all-in-one solution for adding precise autoguiding to your astrophotography setup. This system provides the essential optical hardware needed to lock onto a guide star, allowing your mount to make the micro-corrections necessary for capturing sharp, round stars during long exposures. Its compact form factor is specifically intended for portable and wide-field imaging rigs where minimizing weight and complexity is critical.\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 Autoguiding for Portable Imaging Rigs\u003c\/h3\u003e\n\u003cp\u003eThis guiding set is built for the imager on the go. By integrating a small-aperture scope with the necessary mounting hardware, it allows you to add powerful tracking correction without upsetting the balance of your primary telescope. It's an ideal match for wide-field refractors and camera lenses, where a bulky, heavy guidescope would be impractical and introduce 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\u003eLightweight Design for Fast Setup and Stable Tracking\u003c\/h3\u003e\n\u003cp\u003eEvery component in the Player One 100mm Mini Guiding Set is chosen to keep weight to a minimum. This ensures it can be supported by common finder-style dovetail shoes, making installation straightforward on most telescopes. The reduced mass helps prevent differential flexure—a common issue where the guidescope and main telescope sag at different rates, leading to trailed stars even with perfect guiding.\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\"\u003eWhat is the primary purpose of the Player One 100mm Mini Guiding Set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Player One 100mm Mini Guiding Set is designed to function as a complete optical system for autoguiding. When paired with a guide camera, it allows your equatorial mount to track celestial objects with high precision, resulting in sharper astrophotographs with round stars, especially during exposures longer than a minute.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is the Player One 100mm Mini Guiding Set best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis guiding set is ideal for \u003cstrong\u003eportable, wide-field imaging setups\u003c\/strong\u003e. This includes small refractors (like a RedCat 51 or Zenithstar 61) and telephoto camera lenses used for astrophotography. Its lightweight nature prevents it from overloading small mounts or causing balance issues.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Player One 100mm Mini Guiding Set as a finder scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. When paired with a low-magnification eyepiece (sold separately), this guiding set can double as a high-quality optical finder scope. This allows you to visually locate and center objects before beginning your imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this guiding set work for imaging the Orion Nebula (M42) with a small refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Orion Nebula (M42) is a large, bright target well-suited for wide-field refractors. The Player One 100mm Mini Guiding Set will allow you to take multi-minute exposures to capture the faint, extended nebulosity without star trailing, which is essential for a detailed image of this object.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to start autoguiding with the Player One 100mm Mini Guiding Set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo create a complete autoguiding system, you will need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA dedicated \u003cstrong\u003eautoguiding camera\u003c\/strong\u003e (e.g., Player One Neptune or Ceres series)\u003c\/li\u003e\n\u003cli\u003eAn \u003cstrong\u003eequatorial mount\u003c\/strong\u003e with an ST-4 guide port or ASCOM pulse-guiding capability\u003c\/li\u003e\n\u003cli\u003eA \u003cstrong\u003elaptop or mini-PC\u003c\/strong\u003e running guiding software like PHD2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a mini guide scope sufficient for a large Schmidt-Cassegrain Telescope (SCT)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor larger, long-focal-length telescopes like an 8\" or 11\" SCT, a mini guide scope can be challenging. The risk of \u003cstrong\u003edifferential flexure\u003c\/strong\u003e between the small guide scope and the heavy main telescope is higher. For these systems, an Off-Axis Guider (OAG) is often the more stable and reliable solution.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e100mm\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51112149811485,"sku":"POA-MINIGS","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Player-One-100mm-Mini-Guiding-Set.jpg?v=1775160898"},{"product_id":"william-optics-elite-drawer-oag-kit","title":"William Optics Elite Drawer OAG Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIntegrates Off-Axis Guider and Filter Drawer\u003c\/li\u003e\n\u003cli\u003e37.5 mm Optical Length\u003c\/li\u003e\n\u003cli\u003eSupports M48, M54, and M68 Connections\u003c\/li\u003e\n\u003cli\u003eMagnetic M48 Filter Holder\u003c\/li\u003e\n\u003cli\u003e336 g (11.85 oz) Total Weight\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\u003eWilliam Optics Elite Drawer OAG Kit\u003c\/h2\u003e\n\u003cp\u003eThe William Optics Elite Drawer OAG Kit streamlines your imaging train by combining a precise off-axis guider and a magnetic M48 filter drawer into a single 336 g unit. This integrated design consumes only 37.5 mm of optical length, providing a rigid, compact solution for connecting telescopes and cameras using the included M48, M54, and M68 adapters.\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\u003eA 37.5 mm Solution for Complex Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eBy merging two critical accessories, the Elite Drawer OAG eliminates common sources of flexure and saves precious back focus. Its total optical path of just 37.5 mm makes it possible to build complex imaging trains with correctors or reducers, even on systems with limited focus travel. The single, solid body weighs only 336 g, reducing mechanical strain on your focuser compared to stacking separate components.\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\u003eOff-Axis Guiding with an Adjustable Prism and Helical Focuser\u003c\/h3\u003e\n\u003cp\u003eThe OAG features a high-transmission prism that can be adjusted in height, allowing you to pick off guide stars from the edge of the field without vignetting your main camera sensor. The dedicated guide port accepts both M42-threaded and 1.25\" push-in guide cameras. A non-rotating helical focuser provides smooth, precise focus adjustments for your guide camera, ensuring you achieve sharp stars without disturbing the main imaging path.\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\u003eSecure Magnetic M48 Filter Swaps\u003c\/h3\u003e\n\u003cp\u003eIntegrated into the OAG body is a magnetic drawer system designed for a single M48 (2-inch) mounted filter. This design allows for rapid filter changes without needing to disassemble any part of your imaging train. The magnetic holder ensures the filter is seated securely and parallel to the sensor plane, maintaining optical alignment from shot to shot.\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\u003eM48, M54, and M68 Adapters for System Flexibility\u003c\/h3\u003e\n\u003cp\u003eThis kit is built for broad compatibility across different telescope and camera systems. It includes adapters for M48, M54, and M68 connections on the telescope side, and M48 and M54 adapters for the camera side. This extensive set of included hardware ensures you can integrate the Elite Drawer OAG into most modern imaging setups right out of the box.\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\u003eElite Drawer OAG vs. Separate Components: An Integrated Advantage\u003c\/h3\u003e\n\u003cp\u003eChoosing an integrated system like the Elite Drawer OAG offers distinct advantages over purchasing a separate OAG and filter drawer.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Focus Savings:\u003c\/strong\u003e A typical OAG and filter drawer might consume 20mm + 21mm (41mm) of back focus. At 37.5 mm, this integrated unit saves critical millimeters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Flexure:\u003c\/strong\u003e With one solid body instead of two separate accessories threaded together, you have fewer potential points of mechanical flex, leading to rounder stars across long exposures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplicity and Weight:\u003c\/strong\u003e A single, 336 g component is often lighter and always simpler to manage in the dark than two separate parts. The trade-off is the inability to use a filter wheel for automated changes, as this system is designed for single-filter use.\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 is the total optical length of the William Optics Elite Drawer OAG Kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe William Optics Elite Drawer OAG Kit adds exactly \u003cstrong\u003e37.5 mm\u003c\/strong\u003e of optical length to your imaging train. This compact measurement is crucial for systems with limited back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat filter size does the Elite Drawer OAG Kit use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe magnetic filter holder is designed to accept one standard \u003cstrong\u003eM48 x 0.75 (2-inch) mounted filter\u003c\/strong\u003e. It is not compatible with unmounted filters or other filter sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the guide camera on the Elite Drawer OAG Kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe guide port features a built-in \u003cstrong\u003ehelical focuser\u003c\/strong\u003e. By turning the knurled ring on the guide port, you can make fine focus adjustments to your guide camera without affecting the main camera focus. The port accepts both 1.25\" push-in and M42-threaded guide cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 37.5 mm optical path of the Elite Drawer OAG Kit work with my Newtonian that has limited back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt 37.5 mm, the Elite Drawer OAG is one of the more back-focus-friendly integrated solutions available. However, you must first confirm the total available back focus of your specific Newtonian telescope and imaging train. Measure the distance from your coma corrector's shoulder to the required sensor position and ensure it is greater than 37.5 mm plus any other required spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect the Elite Drawer OAG between my William Optics refractor with an M68 focuser and my camera with M48 threads?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe kit includes the necessary adapters for this exact scenario. You would use the included \u003cstrong\u003eM68 adapter\u003c\/strong\u003e to thread the OAG onto your telescope's focuser drawtube. On the other side, you would use the included \u003cstrong\u003eM48 adapter\u003c\/strong\u003e to connect to your camera's M48 threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the prism position adjustable on the William Optics Elite Drawer OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the prism stalk can be raised or lowered. This allows you to position the prism at the optimal depth to intercept guide stars from the edge of your telescope's corrected image circle without casting a shadow on your main imaging sensor.\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\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e37.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side Connections\u003c\/td\u003e\n\u003ctd\u003eM54, M48, M68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Side Connection (Main)\u003c\/td\u003e\n\u003ctd\u003eM54, M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Side Connection (Guide)\u003c\/td\u003e\n\u003ctd\u003eM42, 1.25\" push-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e336 g \/ 11.85 oz\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/william-optics-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWilliam Optics 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":52662242214173,"sku":"WO-M-OAG-ED","price":543.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/William-Optics-Elite-Drawer-OAG-1.jpg?v=1785457639"},{"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":399.0,"currency_code":"CAD","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"},{"product_id":"askar-m54-oag","title":"Askar M54 Off-Axis Guider (OAG)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLarge 10mm x 10mm guide prism\u003c\/li\u003e\n\u003cli\u003eM54, M48, and M42 adapters provide broad compatibility\u003c\/li\u003e\n\u003cli\u003eOptimized for full-frame cameras\u003c\/li\u003e\n\u003cli\u003eRigid CNC-machined construction\u003c\/li\u003e\n\u003cli\u003eEliminates differential flexure for sharper guiding\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 M54 Off-Axis Guider (OAG)\u003c\/h2\u003e\n\u003cp\u003eThe Askar M54 Off-Axis Guider (OAG) solves differential flexure by sampling the same light path as your main imaging camera, using a large 10mm x 10mm prism to intercept guide stars at the edge of the corrected field. With included M54, M48, and M42 threaded adapters, this OAG integrates directly into your full-frame imaging train, providing rigid, accurate guiding without the need for a separate guide scope.\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\u003eA 10x10mm Prism for Brighter Guide Stars\u003c\/h3\u003e\n\u003cp\u003eThe core of the Askar OAG is its oversized 10mm x 10mm prism. This large surface area collects significantly more light than smaller prisms, increasing the brightness of potential guide stars and expanding your selection, which is critical when imaging in star-poor regions of the sky. This makes it easier to find and lock onto a suitable guide star without having to rotate the entire imaging train.\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\u003eM54, M48 \u0026amp; M42 Adapters for Full-Frame Setups\u003c\/h3\u003e\n\u003cp\u003eDesigned for the modern astrophotographer, the Askar M54 OAG features a large clear aperture to prevent vignetting on full-frame sensors. It includes a versatile set of threaded adapters—M54, M48 (2-inch filter thread), and M42 (T-thread)—ensuring seamless integration with a wide variety of flatteners, reducers, and cameras. The entire body is CNC machined for maximum rigidity, ensuring your guide camera and imaging camera move as a single, solid unit.\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\"\u003eWhat is the main benefit of the Askar M54 OAG's 10x10mm prism?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe large \u003cstrong\u003e10mm x 10mm prism\u003c\/strong\u003e gathers more light, making it easier to find and lock onto fainter guide stars. This is a significant advantage over smaller prisms, especially when using narrowband filters or imaging in areas of the sky with few bright stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Askar M54 OAG cause vignetting with my full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Askar M54 OAG is specifically designed with a large clear aperture to fully illuminate full-frame sensors (24mm x 36mm). When correctly installed, the prism sits just outside the main imaging sensor's light path, preventing any shadowing or vignetting on your final image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich adapters are included with the Askar M54 OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar M54 OAG includes three of the most common threaded adapters used in astrophotography:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54 x 0.75:\u003c\/strong\u003e For connecting to large-format flatteners and correctors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48 x 0.75:\u003c\/strong\u003e The standard for 2\" filters and many full-frame correctors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 x 0.75:\u003c\/strong\u003e The universal T-thread for connecting to smaller cameras and accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Askar M54 OAG improve guiding over a separate guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn Off-Axis Guider eliminates \u003cstrong\u003edifferential flexure\u003c\/strong\u003e, which is tiny mechanical sagging or shifting between the main telescope and a separate guide scope. By using the same optical tube for both imaging and guiding, the OAG ensures that any movement detected by the guide camera is the exact same movement affecting the imaging camera, resulting in sharper, rounder stars during long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar M54 OAG to guide on targets like the Andromeda Galaxy (M31) with my wide-field refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. For large targets like the Andromeda Galaxy (M31), the Askar OAG's large prism makes it easy to find a suitable guide star in the periphery of your field of view while you frame the galaxy's core on your main sensor. This setup is ideal for capturing wide-field mosaics and deep images of expansive nebulae and galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar M54 OAG difficult to set up for a beginner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile OAGs require more initial setup than a guide scope (specifically, achieving simultaneous focus between the imaging and guide cameras), the Askar M54 OAG is designed to be user-friendly. The included adapters simplify connection, and the large prism makes the challenging task of finding a guide star much easier for those new to off-axis guiding.\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\u003ePrism Size\u003c\/td\u003e\n\u003ctd\u003e10mm x 10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side Threads\u003c\/td\u003e\n\u003ctd\u003eM54x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Side Threads\u003c\/td\u003e\n\u003ctd\u003eM54x0.75, M48x0.75, M42x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Support\u003c\/td\u003e\n\u003ctd\u003eFull-Frame Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eCNC Machined Aluminum\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\"\u003eAskar M54 Off-Axis Guider\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\"\u003eM54 Adapter Ring\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\"\u003eM48 Adapter Ring\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\"\u003eM42 Adapter Ring\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":52851342147869,"sku":"ASK-ASKAROAG","price":276.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-Off-axis-Guider-OAG-1_7a7f02f4-1900-4056-830e-a70d82de66ff.jpg?v=1788401846"},{"product_id":"svbony-sv238-off-axis-guider-oag","title":"SVBONY SV238 Off-Axis Guider (OAG)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCorrects tracking errors and opto-mechanical flexure\u003c\/li\u003e\n\u003cli\u003eLarge 8 × 14 mm prism for bright guide stars\u003c\/li\u003e\n\u003cli\u003eSlim 12.5 mm body thickness preserves back focus\u003c\/li\u003e\n\u003cli\u003eSupports main imaging cameras up to APS-C sensor size\u003c\/li\u003e\n\u003cli\u003eIncludes M54 and M48 telescope 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\u003eSVBONY SV238 Off-Axis Guider (OAG)\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV238 Off-Axis Guider delivers exacting tracking accuracy by integrating a large 8 × 14 mm prism into a slim, 12.5 mm thick body. This design eliminates the differential flexure common with separate guidescopes, making it essential for long-exposure imaging with sensors up to APS-C format. With native M54 and M48 interfaces and a 1.25-inch port for guide cameras, the SV238 provides a rigid, precise connection in complex imaging trains.\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\u003eEliminating Flexure: The Advantage of an 8x14mm Prism\u003c\/h3\u003e\n\u003cp\u003eFor long-focal-length imaging, the greatest threat to sharp stars is differential flexure between the main telescope and a separate guidescope. The SV238 OAG solves this by using an 8 × 14 mm prism to pick off a small portion of the main telescope's light path. Any tracking error or mechanical shift seen by your guide camera is the exact same error seen by your main imaging camera, resulting in perfectly round stars.\u003c\/p\u003e\n\u003cp\u003eThe large prism size ensures you can find a suitable guide star even in sparse star fields, illuminating guide sensors from 1\/3\" to 1\/1.8\" effectively. This removes the need for a heavy, flexure-prone guidescope, simplifying your setup and improving overall image quality.\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\u003eA Slim 12.5mm Profile for Modern Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eBack focus is a critical and often limited resource in astrophotography. The SV238 OAG is engineered with a main body thickness of just 12.5 mm, consuming minimal space in your optical train. This slim profile allows you to easily incorporate other essential accessories like filter wheels and rotators while still reaching focus with your main camera.\u003c\/p\u003e\n\u003cp\u003eThe total optical path length is determined by the adapter used, with the M48 adapter adding 4 mm and the M54 adapter adding 5 mm. This compact and rigid CNC-machined aluminum body is designed to support cameras with sensors up to APS-C without causing vignetting on the guide prism.\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\u003ePrecision Adjustments for Pinpoint Guide Stars\u003c\/h3\u003e\n\u003cp\u003eAchieving optimal guiding requires precise focus on the guide star. The SV238 features a dedicated helical focuser for the 1.25-inch guide camera port, allowing for smooth, backlash-free adjustments to get your guide stars perfectly sharp. A sharp guide star enables your software to calculate centroids more accurately, leading to sub-pixel guiding corrections.\u003c\/p\u003e\n\u003cp\u003eFurthermore, the prism height is adjustable, allowing you to fine-tune its position. You can move the prism deeper into the light path to capture brighter stars or retract it to avoid vignetting the main sensor, providing the flexibility needed for various telescope and camera combinations.\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\u003eBroad Compatibility: M54, M48, and 1.25-inch Connections\u003c\/h3\u003e\n\u003cp\u003eThe SV238 is designed for maximum compatibility with common astrophotography equipment. It includes both M54 and M48 threaded adapters for connecting to a wide range of flatteners, reducers, and focusers. For connecting to cameras or filter wheels with smaller threads, M54-M42 and M48-M42 adapters are also included in the box.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope Interface:\u003c\/strong\u003e M54 and M48 adapters included for direct connection to your imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide Camera Interface:\u003c\/strong\u003e A standard 1.25-inch holder with a helical focuser accepts most planetary and guide cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Support:\u003c\/strong\u003e Provides an unvignetted guide field for main imaging cameras with sensors up to the APS-C format.\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 is the total optical path of the SVBONY SV238 OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe total optical path length depends on the adapter you use. The main body of the SV238 OAG is \u003cstrong\u003e12.5 mm\u003c\/strong\u003e thick. To this, you add the thickness of the telescope-side adapter: the \u003cstrong\u003eM48 adapter is 4 mm\u003c\/strong\u003e and the \u003cstrong\u003eM54 adapter is 5 mm\u003c\/strong\u003e. Therefore, the total path length is 16.5 mm with the M48 adapter and 17.5 mm with the M54 adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set up the SV238 OAG with an SCT and an APS-C camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a Schmidt-Cassegrain Telescope (SCT) with a standard rear cell thread, you will typically need a reducer\/flattener that outputs an M48 or M54 thread. First, attach the appropriate adapter (M48 or M54) to the telescope side of the SV238. Then, connect your APS-C camera to the other side, using any necessary spacers to achieve the correct back focus for your flattener. Finally, insert your 1.25-inch guide camera into the helical focuser port and adjust both the prism height and helical focuser to get a sharp image of a guide star.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 8 × 14 mm prism on the SV238 vignette my main camera sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV238 is designed to work with main camera sensors \u003cstrong\u003eup to APS-C format\u003c\/strong\u003e without the prism obstructing the main light path. The prism height is also adjustable, allowing you to retract it slightly if you notice any shadowing on your flat frames, ensuring a clear field for your primary imaging camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the SV238 OAG find a guide star for imaging faint targets like the Pelican Nebula (IC 5070)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The large \u003cstrong\u003e8 × 14 mm prism\u003c\/strong\u003e intercepts a significant amount of light, increasing your chances of finding a suitable guide star, even when pointed at areas away from the dense Milky Way core. For a target like the Pelican Nebula, pairing the SV238 with a sensitive guide camera (recommended size \u003cstrong\u003e1\/3\" to 1\/1.8\"\u003c\/strong\u003e) should allow you to locate a guide star without issue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat guide cameras are recommended for the SVBONY SV238?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV238 is optimized for guide cameras with sensor sizes ranging from \u003cstrong\u003e1\/3\" to 1\/1.8\"\u003c\/strong\u003e. This range includes popular and sensitive monochrome guide cameras that are well-suited for picking up faint guide stars through the OAG prism. The guide camera should have a standard 1.25-inch nosepiece to fit the helical focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use the SV238 OAG instead of a separate guidescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn OAG like the SV238 eliminates the problem of \u003cstrong\u003edifferential flexure\u003c\/strong\u003e. This is when the main telescope and a separate, externally mounted guidescope physically shift slightly relative to each other during an exposure, causing elongated stars. Because the OAG uses the same light path as the main camera, it guides on the exact same motion, correcting for tracking errors, mirror flop, and tube flexure simultaneously.\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\u003ePrism Size\u003c\/td\u003e\n\u003ctd\u003e8 × 14 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOAG Body Thickness\u003c\/td\u003e\n\u003ctd\u003e12.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable Main Camera Sensor\u003c\/td\u003e\n\u003ctd\u003eUp to APS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Guide Sensor Size\u003c\/td\u003e\n\u003ctd\u003e1\/3\" to 1\/1.8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Interface\u003c\/td\u003e\n\u003ctd\u003eM54 \/ M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM54 Adapter Thickness\u003c\/td\u003e\n\u003ctd\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM48 Adapter Thickness\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Camera Interface\u003c\/td\u003e\n\u003ctd\u003eScrew Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Camera Interface\u003c\/td\u003e\n\u003ctd\u003e1.25 inch with Helical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Height Adjustable\u003c\/td\u003e\n\u003ctd\u003eSupported\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\"\u003eSV238 Off-Axis Guider 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\"\u003eM48 Adapter\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\"\u003eM54-M42 Adapter\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\"\u003eM48-M42 Adapter\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\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861226189085,"sku":"SV-W9196A","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Off-Axis-Guider-OAG-SV238-1_2de77cc6-de5b-4aea-951d-e2d295b77122.jpg?v=1788659524"}],"url":"https:\/\/davidastro.com\/collections\/autoguiding.oembed?page=3","provider":"David Astro","version":"1.0","type":"link"}