{"title":"QHYCCD Adapters","description":"\u003cp\u003eQHYCCD adapters connect QHYCCD cameras to filter wheels, off-axis guiders and telescopes at the right backfocus. The M42 and M54 All-In-One adapter kits and the numbered Adapter Kit Combos, such as A1, A2, B1, D1, D2, D3, E1 and G1, cover common camera, filter wheel and OAG combinations.\u003c\/p\u003e\u003cp\u003eIndividual parts include a 5mm M54-M54 adapter, a top adapter with M54 mount for the CAA, and an adapter linking the QHY600 SBFL to the CFW3XL filter wheel.\u003c\/p\u003e","products":[{"product_id":"qhyccd-m54-all-in-one-adapter-kit","title":"QHYCCD M54 All-In-One Adapter Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eComprehensive M54 Adapter Set\u003c\/li\u003e\n\u003cli\u003eAchieve Precise Back Focus Spacing\u003c\/li\u003e\n\u003cli\u003eBuild Rigid, All-Threaded Connections\u003c\/li\u003e\n\u003cli\u003eEliminates Component Sourcing Headaches\u003c\/li\u003e\n\u003cli\u003eIntegrates Seamlessly with QHYCCD Cameras and Accessories\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 M54 All-In-One Adapter Kit\u003c\/h2\u003e\n\u003cp\u003eThe QHYCCD M54 All-In-One Adapter Kit is a complete solution designed to solve the common and often frustrating challenge of achieving precise back focus with M54-threaded components. This comprehensive collection provides the necessary spacers and converters to build a rigid, secure imaging train, connecting your QHYCCD camera to filter wheels, off-axis guiders, and telescope correctors without the guesswork of sourcing individual parts.\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 QHYCCD Solution for M54 Spacing Challenges\u003c\/h3\u003e\n\u003cp\u003eModern flatteners, reducers, and coma correctors demand exacting back focus distances to deliver sharp stars across the field. The QHYCCD M54 All-In-One Adapter Kit is engineered to meet this demand, providing a curated selection of M54 adapters. It allows you to systematically build out the correct spacing for your specific optical train, ensuring your optical correctors work at their designed optimum.\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\u003eBuilding a Rigid and Versatile M54 Imaging Train\u003c\/h3\u003e\n\u003cp\u003eFlexure and tilt are the enemies of sharp, round stars, especially with large sensors and heavy accessories. This kit enables you to construct an imaging train using robust M54 threaded connections from the camera to the telescope. This all-threaded approach provides a much more rigid and stable connection than using smaller M48 or M42 adapters with multiple step-up rings, minimizing potential tilt that can ruin an image.\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\u003eStreamline Connections and Eliminate Guesswork\u003c\/h3\u003e\n\u003cp\u003eInstead of purchasing adapters one by one as needs arise, the All-In-One Kit provides a full suite of the most commonly needed M54 components. This saves you valuable time and eliminates the shipping delays that can halt an imaging project. Having this kit on hand means you are prepared to connect a wide variety of M54-compatible accessories to your QHYCCD camera right out of the box.\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 QHYCCD M54 All-In-One Adapter Kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main purpose of the \u003cstrong\u003eQHYCCD M54 All-In-One Adapter Kit\u003c\/strong\u003e is to provide a comprehensive set of spacers and adapters to achieve precise back focus. It allows you to build a rigid, secure, all-threaded M54 imaging train between your QHYCCD camera and your telescope's flattener or reducer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use an M54 adapter kit instead of smaller M48 adapters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eM54 adapters provide a larger, more rigid connection that is less prone to tilt and flexure, which is critical for systems with heavy cameras, large sensors, or long accessory trains. An all-M54 connection path helps ensure the entire optical axis remains perfectly aligned, preventing elongated stars in the corners of your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the QHYCCD M54 All-In-One Kit designed for a specific camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile this kit is ideal for any QHYCCD camera that utilizes an M54 connection, it is particularly useful for cameras with APS-C or full-frame sensors. These larger sensors benefit most from the wide, unvignetted, and rigid connection that the M54 standard provides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the QHYCCD M54 kit help connect my camera to a new refractor with an M54 flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf your refractor's flattener terminates in M54 threads and requires a specific back focus distance (e.g., 55mm), this kit would provide the various extension tubes and adapters needed to bridge that gap precisely. You can mix and match the included components to build up the exact distance from your camera's sensor to the flattener's shoulder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy new coma corrector has a specific back focus. Will the QHYCCD M54 kit guarantee I can achieve it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains a wide variety of commonly used M54 adapters, making it highly likely you can achieve standard back focus distances like 55mm. By combining the different adapters, you can dial in the spacing required by most popular correctors on the market, avoiding the need to source individual, hard-to-find parts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the main advantage of buying the QHYCCD M54 kit versus individual adapters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is convenience and preparedness. The \u003cstrong\u003eQHYCCD M54 All-In-One Kit\u003c\/strong\u003e saves you the time and frustration of identifying, ordering, and waiting for individual adapters. It provides a versatile toolkit so you can immediately reconfigure your imaging train for different telescopes or accessories without delay.\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\u003ca href=\"https:\/\/davidastro.com\/pages\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":44967915225373,"sku":"QHY-020112","price":189.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHY-M54_all-In-One-Kit__45862.1628717067.1280.1280.jpg?v=1684346988"},{"product_id":"qhyccd-m42-all-in-one-adapter-kit","title":"QHYCCD M42 All-In-One Adapter Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eStandardizes M42 (T-Thread) Connections\u003c\/li\u003e\n\u003cli\u003eEnables Precise Back Focus Adjustment\u003c\/li\u003e\n\u003cli\u003eConnects Cameras, Filter Wheels, and OAGs\u003c\/li\u003e\n\u003cli\u003eAll-in-One Kit for Imaging Train Flexibility\u003c\/li\u003e\n\u003cli\u003eDurable Metal Construction\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 M42 All-In-One Adapter Kit\u003c\/h2\u003e\n      \u003cp\u003eThe QHYCCD M42 All-In-One Adapter Kit is a comprehensive solution for achieving precise spacing and solid connections within your astrophotography imaging train. This kit provides the necessary components to integrate your QHYCCD camera with a variety of M42-threaded accessories like filter wheels, off-axis guiders, and field flatteners. It eliminates the trial-and-error of sourcing individual adapters by offering a versatile collection designed to meet common back focus requirements.\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\u003eSolving Back Focus with the M42 Adapter Kit\u003c\/h3\u003e\n      \u003cp\u003eAchieving the correct distance between your camera sensor and your corrector is the most critical element for sharp, round stars across the entire field. This QHYCCD M42 adapter kit is designed specifically to solve this problem. By providing a selection of common M42 spacers, it allows you to assemble the exact back focus distance your flattener or reducer specifies, ensuring your optical system performs at its best.\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\u003eStandardizing Your M42 Imaging Train\u003c\/h3\u003e\n      \u003cp\u003eMixing components from different manufacturers can often lead to connection headaches. The QHYCCD M42 All-In-One Adapter Kit simplifies this by standardizing your connections around the universal M42 (T-thread) specification. Whether you are connecting a QHY camera to a third-party off-axis guider or integrating a filter wheel, this kit provides the robust, threaded connections needed for a flexure-free imaging setup.\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 primary purpose of the QHYCCD M42 All-In-One Adapter Kit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary purpose of the \u003cstrong\u003eQHYCCD M42 All-In-One Adapter Kit\u003c\/strong\u003e is to provide a versatile set of spacers and connectors to achieve precise back focus and create secure, threaded connections between your camera and other M42 accessories like filter wheels, off-axis guiders, and field flatteners.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the QHYCCD M42 Kit help me connect my camera to a field flattener?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eMost field flatteners and reducers require a very specific distance to the camera sensor (e.g., 55mm) to function correctly. This kit provides various M42-threaded adapters and spacers that you can combine to precisely match that required distance, ensuring your stars are sharp from edge to edge.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the QHYCCD M42 Adapter Kit with non-QHYCCD cameras and accessories?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The kit is based on the industry-standard \u003cstrong\u003eM42 x 0.75mm T-thread\u003c\/strong\u003e. As long as your camera and accessories also use this common thread, the adapters in this kit should be fully compatible, regardless of the manufacturer.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eMy imaging train has flexure. Can the QHYCCD M42 Adapter Kit help?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Flexure is often caused by non-threaded, slip-fit connections (like 1.25\" or 2\" nosepieces). By allowing you to create a completely threaded M42 connection from your telescope's focuser to your camera, the \u003cstrong\u003eQHYCCD M42 Adapter Kit\u003c\/strong\u003e creates a rigid imaging train that significantly reduces or eliminates flexure.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I buy the QHYCCD All-In-One Kit instead of individual adapters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis kit provides convenience and flexibility. Calculating the exact combination of adapters needed can be difficult, and imaging trains often change. The \u003cstrong\u003eQHYCCD All-In-One Kit\u003c\/strong\u003e gives you a toolbox of common adapters, saving you the time and expense of ordering individual parts and waiting for them to arrive when you discover you need a different spacing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the QHYCCD M42 kit to install an off-axis guider between my filter wheel and camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou would use the adapters in the kit to build out the correct spacing. First, you'd find an adapter to connect the filter wheel to the OAG. Then, you would use a combination of spacers from the kit to set the required distance from the OAG's pick-off prism to the main camera sensor, while also ensuring your guide camera can reach focus.\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      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \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":"Default Title","offer_id":44967915290909,"sku":"QHY-020111","price":84.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHY-M42-All-In-One-Kit__71911.1628717606.1280.1280.jpg?v=1684346989"},{"product_id":"qhyccd-adapter-kit-combo-b1","title":"QHYCCD Adapter Kit - Combo B1","description":"\u003c!-- more --\u003e\u003cp\u003eThis Combo B1 is included as a standard accessory with the QHY268M and the QHY600 Short Back Focus version. It allows to reach a 55mm back focus.\u003c\/p\u003e\u003ch3\u003eKit Content\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e5mm M54 to M48 Adapter*1\u003c\/li\u003e\n\u003cli\u003e3mm Spacer*3\u003c\/li\u003e\n\u003cli\u003e1mm Spacer*1\u003c\/li\u003e\n\u003cli\u003e10mm Spacer*1\u003c\/li\u003e\n\u003cli\u003e24mm M3 Screws*8\u003c\/li\u003e\n\u003cli\u003e28mm M3 Screws*8\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatiblity\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eQHY268M\/QHY600 Short BFL+CFW3L+OAG\u003c\/li\u003e\n\u003cli\u003eQHY268M+CFW3M-US+OAG\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDiagrams for Combo B1\u003c\/h3\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_qhy_combo_b1_diagram_1.jpg?v=1684346974?t=1628724071\" alt=\"QHY Combo B1 Diagram 1\" width=\"1112\" height=\"521\"\u003e\u003c\/p\u003e\u003cp\u003eNote:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eIf your MPCC requires a BFL different from 55mm, this adjustment can be made by selecting the appropriate spacer between the MPCC and the OAG.  For example, an MPCC that requires 57.5mm can be used instead by adding a spacer ring or rings that add 2.5mm of BFL. to the diagram above.\u003c\/li\u003e\n\u003cli\u003eIf you don’t use an OAG, you can use a 10mm spacer adapter in the adapter kits to replace the original position of OAG.\u003c\/li\u003e\n\u003cli\u003ePut OAG at the position next to the M48 Output to make both main cam and guiding cam focused.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_qhy_combo_b1_diagram_2.jpg?v=1684346976?t=1628724136\" alt=\"QHY Combo B1 Diagram 2\" width=\"1112\" height=\"521\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/t\/7\/assets\/description_image_qhy_combo_b1_diagram_3.jpg?v=1684346978?t=1628724241\" alt=\"QHY Combo B1 Diagram 3\" width=\"1112\" height=\"521\"\u003e\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":44967915651357,"sku":"QHY-020103","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHY-Adapter-Kit-Combo-B1__24660.1650659168.1280.1280.jpg?v=1684346989"},{"product_id":"qhyccd-adapter-kit-combo-a2","title":"QHYCCD Adapter Kit - Combo A2","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for QHYCCD Cameras\u003c\/li\u003e\n\u003cli\u003eEnsures Correct Back Focus Spacing\u003c\/li\u003e\n\u003cli\u003eCreates Rigid, Flex-Free Connections\u003c\/li\u003e\n\u003cli\u003eMates Cameras to Scopes, Reducers, and Filter Wheels\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 Adapter Kit - Combo A2\u003c\/h2\u003e\n      \u003cp\u003eThe QHYCCD Adapter Kit - Combo A2 provides the necessary components to securely connect your QHYCCD camera to your telescope, focal reducer, or filter wheel. This kit is engineered to help you achieve the precise back focus required for sharp, aberration-free stars across the entire image frame. By providing a selection of matched adapters, it eliminates the guesswork and potential flexure that can arise from combining parts from different manufacturers.\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\u003eSecure Your Imaging Train: The QHYCCD Combo A2 Solution\u003c\/h3\u003e\n      \u003cp\u003eAchieving a rigid, flex-free imaging train is critical for astrophotography, especially with heavier cameras or when using off-axis guiders and filter wheels. The Combo A2 adapter kit from QHYCCD is designed to create solid, threaded connections between your components. This prevents tilt and sag, ensuring your optical alignment remains perfect throughout a long imaging session.\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 primary purpose of the QHYCCD Adapter Kit - Combo A2?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary purpose of the \u003cstrong\u003eQHYCCD Adapter Kit - Combo A2\u003c\/strong\u003e is to provide the correct mechanical connections and spacing to achieve precise back focus for a QHYCCD camera. It allows you to build a rigid and reliable imaging train with various telescopes and accessories like filter wheels or off-axis guiders.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if the QHYCCD Combo A2 kit is right for my camera and telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis kit is specifically designed for use with QHYCCD cameras. Compatibility depends on the specific camera model and the components in your optical train (focal reducer, off-axis guider, etc.). You should consult your camera's documentation for its back focus requirements and connection threads to determine if the adapters in this kit match your needs.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is achieving correct back focus with the QHYCCD Combo A2 kit important?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eCorrect back focus—the specific distance from a corrector or reducer lens to the camera sensor—is essential for sharp stars, especially at the edge of the field. If the spacing is incorrect, you will see elongated or distorted stars. An adapter kit like the \u003cstrong\u003eCombo A2\u003c\/strong\u003e provides the components needed to set this distance accurately.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the QHYCCD Adapter Kit - Combo A2 with non-QHYCCD equipment?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile the adapters may use standard threads (like M42 or M54), this kit is specifically curated for the back focus requirements and mechanical interfaces of QHYCCD cameras. Using it with other brands may not result in the correct spacing and is not guaranteed to be compatible.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the QHYCCD Adapter Kit - Combo A2 help prevent flexure?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. One of the main benefits of using a matched adapter kit like the \u003cstrong\u003eCombo A2\u003c\/strong\u003e is creating a fully threaded, rigid connection from the telescope to the camera. This minimizes sag and flexure, which can tilt the camera sensor and ruin long exposures, especially compared to using simple push-fit or set-screw connections.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat components are typically included in a QHYCCD adapter kit like the Combo A2?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile contents vary, these kits typically include a combination of threaded spacers, extenders, and converters of various lengths and thread types. This allows for a modular approach to building an imaging train that meets the precise back focus requirements of your optical system.\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\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eDesigned for select QHYCCD cameras and accessories\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eProvides spacing and connection for achieving correct back focus\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\"\u003eThis is a kit of assorted adapters. The exact contents are specified by the \"Combo A2\" designation from QHYCCD.\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":"Default Title","offer_id":44967915684125,"sku":"QHY-020101","price":73.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHY-Adapter-Kit-Combo-A2__22094.1628718739.1280.1280.jpg?v=1684346990"},{"product_id":"qhyccd-adapter-kit-combo-d1","title":"QHYCCD Adapter Kit - Combo D1","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects QHYCCD cameras to telescopes and accessories\u003c\/li\u003e\n\u003cli\u003eProvides multiple spacers for achieving correct back focus\u003c\/li\u003e\n\u003cli\u003eEnsures a rigid, threaded connection in your imaging train\u003c\/li\u003e\n\u003cli\u003eDesigned to integrate with various correctors and filter wheels\u003c\/li\u003e\n\u003cli\u003eSimplifies the process of building a stable optical path\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 Adapter Kit - Combo D1\u003c\/h2\u003e\n\u003cp\u003eThe QHYCCD Adapter Kit - Combo D1 is a curated collection of spacers and adapters designed to solve the critical challenge of achieving precise back focus. This kit provides the necessary components to rigidly connect your QHYCCD camera to various telescopes, field flatteners, reducers, and other accessories. By enabling you to dial in the exact spacing required by your optical corrector, the Combo D1 kit ensures your imaging train is both mechanically stable and optically optimized for sharp stars across the entire 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\u003eAchieve Precise Back Focus with Your QHYCCD Camera\u003c\/h3\u003e\n\u003cp\u003eNearly all astrophotography optical systems, especially those with fast focal ratios or field correctors, have a strict back focus requirement—typically 55mm, but this can vary. Failing to meet this distance results in elongated, comatic stars at the edges of your images. The QHYCCD Adapter Kit - Combo D1 eliminates the guesswork by providing a modular system of threaded extensions, allowing you to build the perfect optical path length for your specific setup, whether you're using an off-axis guider, filter wheel, or both.\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 QHYCCD Adapter Kit - Combo D1?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the \u003cstrong\u003eQHYCCD Adapter Kit - Combo D1\u003c\/strong\u003e is to provide a comprehensive set of spacers and connectors to achieve the precise back focus distance required by your telescope's flattener, reducer, or coma corrector. This ensures optimal optical correction and sharp stars across your entire image sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is correct back focus so critical for imaging with the QHYCCD Combo D1 kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCorrect back focus is essential because optical correctors (flatteners, reducers, coma correctors) are designed to work at a specific distance from the sensor. If the spacing is incorrect, you will see optical aberrations, most commonly seen as elongated or misshapen stars in the corners and edges of your photographs. The Combo D1 kit provides the tools to set this distance accurately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the QHYCCD Adapter Kit - Combo D1 to get 55mm of back focus for my coma corrector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would first determine the back focus of your specific QHYCCD camera (e.g., 17.5mm). Then, you select adapters from the Combo D1 kit that, when added to your camera's back focus, total the required 55mm. This creates a solid, threaded column from your corrector to your camera sensor at the exact distance needed for a flat field in your Newtonian telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a QHYCCD camera, a filter wheel, and an OAG. Can the Combo D1 kit connect them all?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a primary use case for the QHYCCD Adapter Kit - Combo D1. You would assemble your imaging train (camera \u0026gt; filter wheel \u0026gt; OAG \u0026gt; corrector) and then use the various spacers in the kit to fill any remaining gap to achieve the total back focus distance required by your corrector. The kit is designed to provide the flexibility for these more complex setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the QHYCCD Combo D1 kit work with non-QHYCCD accessories?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapters in the QHYCCD Combo D1 kit likely use standard threads like M42x0.75 (T-thread) or M48x0.75 (2\" filter thread). While designed for the QHYCCD ecosystem, they will often be compatible with other brands' accessories that use these common astronomical threads. However, you should always verify the thread types of your specific equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan using the QHYCCD Adapter Kit - Combo D1 help reduce tilt in my imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. A major benefit of using a dedicated adapter kit like the Combo D1 is that it relies on rigid, threaded connections instead of compression rings or push-fit adapters. Threaded connections create a more stable and orthogonal imaging train, significantly reducing the chances of sensor tilt which can ruin image sharpness in one or more corners.\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 colspan=\"2\"\u003eNo specifications available for this product.\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\"\u003eNo contents information available for this product.\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":"Default Title","offer_id":44967965655325,"sku":"QHY-020107","price":56.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHY-Combo-D1__03671.1642535216.1280.1280.png?v=1684347333"},{"product_id":"qhyccd-adapter-kit-combo-a1","title":"QHYCCD Adapter Kit - Combo A1","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003ePre-configured adapter set for QHYCCD cameras\u003c\/li\u003e\n\u003cli\u003eSolves common equipment connection challenges\u003c\/li\u003e\n\u003cli\u003eEngineered for secure, rigid imaging trains\u003c\/li\u003e\n\u003cli\u003eSimplifies achieving correct back focus\u003c\/li\u003e\n\u003cli\u003eEliminates trial-and-error of sourcing individual parts\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\u003eQHYCCD Adapter Kit - Combo A1\u003c\/h2\u003e\n      \u003cp\u003eThe QHYCCD Adapter Kit - Combo A1 is a pre-packaged solution designed to simplify the critical task of connecting your QHYCCD camera to your telescope and imaging accessories. This kit provides a curated set of adapters intended to solve a specific, common connection pathway, eliminating the guesswork and potential compatibility issues that arise when sourcing individual components.\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 Curated Adapter Set for QHYCCD Imaging Systems\u003c\/h3\u003e\n      \u003cp\u003eAssembling a rigid, flexure-free imaging train with the correct back focus is one of the most challenging aspects of astrophotography. The QHYCCD Adapter Kit - Combo A1 addresses this by providing a verified set of components that work together seamlessly. Instead of researching and purchasing multiple M42, M48, or M54 adapters separately, this kit offers a direct path to a secure mechanical connection for a specific equipment configuration.\u003c\/p\u003e\n      \u003cp\u003eUsing a manufacturer-designed kit ensures that thread types, thread depths, and component lengths are all correct. This minimizes the risk of tilted sensors or unstable connections that can ruin a long-exposure image, allowing you to focus on capturing data rather than troubleshooting your hardware.\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 purpose of the QHYCCD Adapter Kit - Combo A1?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe QHYCCD Adapter Kit - Combo A1 provides a pre-selected group of adapters to create a solid mechanical connection between a QHYCCD camera and other accessories, such as filter wheels, off-axis guiders, or specific telescope focusers. It is designed to achieve a precise back focus distance required by many optical systems.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use a QHYCCD adapter kit instead of buying individual adapters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis kit eliminates the trial-and-error of matching various thread standards (e.g., M42, M48, M54) and calculating the required extension lengths. It ensures all components are designed to work together, providing a more rigid and reliable connection than a mix-and-match solution, which can introduce flexure or tilt.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the QHYCCD Combo A1 kit compatible with all QHYCCD cameras?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. Adapter kits are typically designed for specific camera models or sensor series that share a common back focus requirement. It is critical to \u003cstrong\u003everify compatibility with your exact camera and optical train\u003c\/strong\u003e before purchasing to ensure it meets your specific spacing needs.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know which QHYCCD adapter combo I need?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe correct adapter combination depends entirely on your specific equipment: the camera, any accessories (like a filter wheel or off-axis guider), and your telescope's focuser or corrector. QHYCCD provides connection diagrams for their cameras; consult these resources to determine if the Combo A1 is the correct solution for your setup.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the QHYCCD Adapter Kit - Combo A1 set the back focus automatically?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe kit provides the physical components needed to achieve a specific back focus distance. You are still responsible for assembling them in the correct order according to the requirements of your camera and any field flatteners or focal reducers in your optical path.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the thread sizes in the QHYCCD Combo A1 kit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe specific components, lengths, and thread sizes for this kit are not specified. To ensure this kit will work for your needs, you must consult official QHYCCD documentation or system charts that explicitly call for the \"Combo A1\" kit for your imaging train configuration.\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      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \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":"Default Title","offer_id":44967968440605,"sku":"QHY-020100","price":56.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHYCCD-Adapter-Combo-Kit-A1__10956.1642535097.1280.1280.png?v=1684347358"},{"product_id":"qhyccd-adapter-kit-combo-d2","title":"QHYCCD Adapter Kit - Combo D2","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects QHYCCD cameras to telescopes and accessories\u003c\/li\u003e\n\u003cli\u003eCreates a rigid, secure imaging train\u003c\/li\u003e\n\u003cli\u003eEssential for achieving precise back focus\u003c\/li\u003e\n\u003cli\u003eMinimizes potential for optical tilt and flexure\u003c\/li\u003e\n\u003cli\u003eDesigned for compatibility within the QHYCCD ecosystem\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 Adapter Kit - Combo D2\u003c\/h2\u003e\n\u003cp\u003eThe QHYCCD Adapter Kit - Combo D2 provides the necessary components to establish a solid, flex-free connection between your QHYCCD camera and your imaging accessories. This kit is designed to ensure your camera sensor is positioned at the correct back focus distance required by your flattener, reducer, or coma corrector. Achieving this precise spacing is fundamental for capturing sharp, perfectly formed stars across the entire field of view.\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\u003eSecuring the QHYCCD Imaging Train for Flex-Free Imaging\u003c\/h3\u003e\n\u003cp\u003eIn astrophotography, even microscopic shifts in the optical path can elongate stars and ruin an image. The QHYCCD Adapter Kit - Combo D2 is engineered to create a rigid, threaded connection that eliminates the sag and tilt often associated with simpler thumbscrew or compression ring holders. This stability is critical when using filter wheels, off-axis guiders, or heavy camera packages.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect Back Focus:\u003c\/strong\u003e Ensures your camera's sensor is placed at the exact focal plane specified by your optical corrector for sharp, aberration-free images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates Tilt:\u003c\/strong\u003e A fully threaded connection provides a square, stable mount for the camera sensor, preventing tilted focal planes that result in one side of the image being out of focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Rigidity:\u003c\/strong\u003e By securely locking components together, the kit prevents mechanical flexure as the telescope tracks across the sky, maintaining consistent focus and collimation throughout your 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\"\u003eWhat is the main purpose of the QHYCCD Adapter Kit - Combo D2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the \u003cstrong\u003eQHYCCD Adapter Kit - Combo D2\u003c\/strong\u003e is to connect a QHYCCD camera to a telescope's optical train, which may include flatteners, reducers, or off-axis guiders. It provides the specific spacing required to achieve correct back focus and ensures a rigid, secure mechanical connection to prevent image-degrading tilt or flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is precise back focus so critical for my QHYCCD camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eField flatteners and focal reducers are designed to work at a very specific distance from the camera sensor. If this distance is even slightly off, you will see distorted stars, especially at the corners of your images. An adapter kit like the Combo D2 provides the exact combination of spacers and adapters needed to hit this distance perfectly, ensuring sharp stars across the entire frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the QHYCCD Adapter Kit - Combo D2 help prevent image tilt?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eImage tilt occurs when the camera sensor is not perfectly perpendicular to the telescope's light path. This can be caused by sag in the focuser or loose connections. By using a fully threaded connection, the \u003cstrong\u003eQHYCCD Adapter Kit - Combo D2\u003c\/strong\u003e ensures the camera is held rigidly and squarely, minimizing the risk of tilt and ensuring consistent focus across your entire field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of accessories can I connect with a QHYCCD adapter kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAdapter kits are used to build a complete imaging train. Depending on the specific adapters included, you can typically connect your QHYCCD camera to essential accessories such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFilter Wheels (for LRGB or narrowband imaging)\u003c\/li\u003e\n\u003cli\u003eOff-Axis Guiders (for precise, flex-free guiding)\u003c\/li\u003e\n\u003cli\u003eField Flatteners or Coma Correctors\u003c\/li\u003e\n\u003cli\u003eFocal Reducers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I am imaging the Pleiades (M45) with a fast f\/4 Newtonian, why is a kit like the QHYCCD Combo D2 important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFast Newtonians require a coma corrector to produce sharp stars away from the center of the field. These correctors have a strict back focus requirement, typically 55mm. The \u003cstrong\u003eQHYCCD Adapter Kit - Combo D2\u003c\/strong\u003e is designed to provide the necessary components to place your camera's sensor at this exact distance, ensuring the bright stars of the Pleiades (M45) are pinpoints from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the QHYCCD Adapter Kit - Combo D2 help when imaging the Orion Nebula (M42) with an SCT and reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn f\/6.3 or f\/7 reducer for a Schmidt-Cassegrain Telescope (SCT) also has a specific back focus distance required for optimal correction. When imaging a large, bright target like the Orion Nebula (M42), you want the entire field to be sharp. This adapter kit helps build a solid, correctly spaced imaging train from the reducer to your QHYCCD camera, preventing distorted stars in the Trapezium cluster or the faint outer nebulosity.\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\u003eDesigned for select QHYCCD cameras and accessories. Please consult your equipment's documentation for specific threading and back focus requirements.\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\"\u003eKit Contents Not Specified\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003ePlease contact us for a detailed list of included adapters.\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":"Default Title","offer_id":44967968506141,"sku":"QHY-020108","price":81.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHY-Adapter-Combo-D2__16292.1642535428.1280.1280.png?v=1684347360"},{"product_id":"qhyccd-adapter-kit-combo-d3","title":"QHYCCD Adapter Kit - Combo D3","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides precise, calculated spacing for specific QHYCCD imaging trains\u003c\/li\u003e\n\u003cli\u003eEnsures correct back focus for flatteners, reducers, and correctors\u003c\/li\u003e\n\u003cli\u003eCreates rigid, threaded connections to eliminate tilt and flexure\u003c\/li\u003e\n\u003cli\u003eSystem-matched components for seamless integration\u003c\/li\u003e\n\u003cli\u003eDesigned for specific QHYCCD camera and accessory combinations\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 Adapter Kit - Combo D3\u003c\/h2\u003e\n\u003cp\u003eThe QHYCCD Adapter Kit - Combo D3 is an engineered solution for assembling a rigid and accurately spaced imaging train with specific QHYCCD cameras and accessories. This kit provides the necessary threaded adapters to achieve the precise back focus required by field flatteners, reducers, or coma correctors. By using system-matched components, you eliminate the guesswork and potential for tilt that can arise from combining generic, third-party 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\u003eCombo D3: Achieving Precise Back Focus for QHYCCD Cameras\u003c\/h3\u003e\n\u003cp\u003eModern optical correctors demand exacting back focus distances to deliver sharp stars across the entire field of view. The Combo D3 adapter kit is designed to provide this specific distance for a defined combination of QHYCCD equipment. This pre-calculated solution ensures your sensor is placed at the optimal focal plane, transforming your raw data with pinpoint stars from edge to edge.\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\u003eSystem-Matched Design: Eliminating Tilt with Rigid Connections\u003c\/h3\u003e\n\u003cp\u003eA common source of image degradation is tilt, where the camera sensor is not perfectly perpendicular to the optical axis. The QHYCCD Adapter Kit - Combo D3 addresses this by creating a fully threaded, rigid connection from your camera to your telescope or filter wheel. This solid assembly prevents the sensor shift and flexure common with compression fittings or mismatched adapters, preserving the optical alignment of your entire system.\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 purpose of the QHYCCD Adapter Kit - Combo D3?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHYCCD Adapter Kit - Combo D3 is designed to connect specific QHYCCD cameras to other imaging accessories (like filter wheels or off-axis guiders) and to a telescope's focuser. Its primary functions are to establish a secure, tilt-free connection and to set the precise back focus distance required by optical correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if the Combo D3 kit is correct for my QHYCCD camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eQHYCCD produces different adapter kits for its wide range of cameras and accessories. To verify if the Combo D3 is the correct kit for your specific setup (e.g., your QHY268M camera and QHYCFW3 filter wheel), it is essential to consult the official mechanical connection diagrams provided by QHYCCD. These charts illustrate the exact adapters needed for various equipment combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use the QHYCCD Adapter Kit - Combo D3 instead of generic adapters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile generic adapters can sometimes connect components, they often fail to provide the exact back focus spacing required for sharp images. Furthermore, the QHYCCD Combo D3 kit ensures a perfect mechanical fit with tight tolerances, creating a rigid, threaded train that minimizes tilt and flexure, which are common problems with mix-and-match solutions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the QHYCCD Adapter Kit - Combo D3 work with accessories from other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit is specifically designed for the threads, body depths, and spacing requirements of QHYCCD products. While some components may share common threads (like M54 or M48), compatibility with third-party accessories is not guaranteed and may result in incorrect spacing or insecure connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Combo D3 kit allow for filter installation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Combo D3 kit is designed to integrate with other components in the imaging train, which may include a filter wheel or filter drawer. The kit itself consists of spacing and conversion adapters; it does not hold filters directly. It provides the correct spacing to accommodate a filter wheel while maintaining the overall back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI use an off-axis guider with my QHYCCD camera. Is the Combo D3 kit compatible?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Combo D3 kit is part of a modular system. You would need to check the QHYCCD connection diagrams to see if this specific kit is part of the recommended solution for your camera and the QHY Off-Axis Guider (OAG). Different OAG models and camera combinations require different adapter configurations to place both the main sensor and the guide sensor in focus.\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 colspan=\"2\" style=\"text-align:center;\"\u003ePlease contact us for specifications.\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\"\u003eContact us for box contents.\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":"Default Title","offer_id":44967968735517,"sku":"QHY-020109","price":81.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/QHYCCD-Adapter-Combo-Kit-D3__60492.1642535532.1280.1280.png?v=1684347362"},{"product_id":"qhyccd-combo-g1","title":"QHYCCD Adapter Kit Combo G1","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAchieves standard 55mm back focus for M48 correctors\u003c\/li\u003e\n\u003cli\u003eProvides 56mm back focus for Takahashi Epsilon M54 systems\u003c\/li\u003e\n\u003cli\u003eEnables correct 44.1mm spacing for Canon lenses\u003c\/li\u003e\n\u003cli\u003eSets precise 46.5mm back focus for Nikon lenses\u003c\/li\u003e\n\u003cli\u003eUtilizes a robust 6-screw connection system to prevent tilt\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 Adapter Kit Combo G1\u003c\/h2\u003e\n\u003cp\u003eThe QHYCCD Adapter Kit Combo G1 is a standardized solution for achieving precise back focus, accommodating the 55mm standard for M48 correctors and the 56mm requirement for Takahashi Epsilon reflectors with M54 threads. This single kit also provides the exact spacing for Canon lenses at 44.1mm and Nikon lenses at 46.5mm, eliminating the complex calculations required when sourcing individual 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\u003ePrecise Spacing for 55mm and 56mm Optical Systems\u003c\/h3\u003e\n\u003cp\u003eHitting the exact back focus is critical for a flat field, and the two most common standards are 55mm and 56mm. The G1 Adapter Kit is engineered to meet both, providing the necessary components to achieve the 55mm distance required by most coma correctors and flatteners, as well as the 56mm needed for specialized systems like the Takahashi Epsilon series.\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\u003eCross-Compatible M48 and M54 Thread Support\u003c\/h3\u003e\n\u003cp\u003eModern imaging trains often use either M48 (2-inch filter) or M54 threads, especially with full-frame cameras and large correctors. The Adapter Kit Combo G1 includes the necessary components to interface with both M48 and M54 connections, ensuring broad compatibility with a wide range of telescopes, correctors, and off-axis guiders without needing to purchase separate adapter sets.\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 6-Screw System: A More Stable Imaging Train\u003c\/h3\u003e\n\u003cp\u003eInstead of relying on simple threads which can introduce sag or tilt, QHYCCD's adapter system uses a robust 6-screw connection. This method ensures all components are held rigidly and perfectly parallel to the sensor plane. This design prevents the subtle positional shifts that can occur as threaded connections are tightened, resulting in a more reliable and stable optical train from the camera to the telescope.\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\u003eNative Spacing for Canon (44.1mm) and Nikon (46.5mm) Lenses\u003c\/h3\u003e\n\u003cp\u003eFor wide-field astrophotography, high-quality DSLR camera lenses are an excellent choice. The G1 kit provides the precise spacing needed to use them with QHYCCD cameras, achieving the required 44.1mm back focus for Canon lenses and 46.5mm for Nikon lenses. This allows you to leverage your existing lens collection for imaging the Milky Way or large nebulae like the North American Nebula (NGC 7000).\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\u003eAdapter Kit G1 vs. DIY Solutions: Simplicity and Reliability\u003c\/h3\u003e\n\u003cp\u003ePreviously, assembling a correct imaging train required calculating the necessary back focus and purchasing individual spacers of various thicknesses—a process prone to error, especially for beginners. The G1 kit is a pre-engineered solution that removes this guesswork entirely.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIY\/Individual Spacers:\u003c\/strong\u003e Requires you to measure and calculate the light path of every component. A small miscalculation can lead to poor star shapes and wasted imaging time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQHYCCD Kit G1:\u003c\/strong\u003e Provides a tested, verified combination of parts designed to achieve common back focus standards like 55mm and 56mm directly. It is a faster, more reliable method for getting your imaging rig properly configured.\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 purpose of the QHYCCD Adapter Kit Combo G1?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHYCCD Adapter Kit Combo G1 is a comprehensive solution designed to achieve precise back focus spacing for various common astrophotography setups. It simplifies the process of connecting a QHYCCD camera to different telescopes, correctors, and lenses by providing all the necessary components in one pre-configured package to hit standards like \u003cstrong\u003e55mm\u003c\/strong\u003e and \u003cstrong\u003e56mm\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat optical systems are supported by the QHYCCD G1 kit's 55mm and 56mm back focus options?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe kit is designed for broad compatibility. The \u003cstrong\u003e55mm\u003c\/strong\u003e back focus configuration is for typical multi-purpose coma correctors and flatteners using M48 threads. The \u003cstrong\u003e56mm\u003c\/strong\u003e configuration is specifically for systems like the Takahashi Epsilon reflector series, which often use M54 threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the QHYCCD G1 kit with my Takahashi Epsilon reflector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Adapter Kit Combo G1 is specifically designed to achieve the \u003cstrong\u003e56mm back focus\u003c\/strong\u003e required by the Takahashi Epsilon series, interfacing with its native M54 threads. This ensures your camera sensor is placed at the optimal distance for a flat, corrected field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a coma corrector with M48 threads requiring 55mm back focus. Is the QHYCCD G1 kit correct for this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The QHYCCD G1 kit is designed to create the industry-standard \u003cstrong\u003e55mm back focus\u003c\/strong\u003e distance for correctors with M48 threads. This makes it a suitable choice for most popular coma correctors and field flatteners on the market.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does QHYCCD use a 6-screw system in the G1 kit instead of just threads?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 6-screw connection system provides a more rigid and stable connection than a simple threaded interface. Threads can have minor errors or loosen, potentially causing tilt in the imaging train. The \u003cstrong\u003e6-screw method\u003c\/strong\u003e locks components together, ensuring they remain perfectly parallel and eliminating a common source of elongated stars at the edge of the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the QHYCCD G1 kit support connecting my Canon DSLR lens to a QHY camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The kit provides the correct components to set the precise \u003cstrong\u003e44.1mm back focus\u003c\/strong\u003e required for Canon lenses. This allows you to use your high-quality Canon EF-mount lenses for wide-field astrophotography with your cooled QHYCCD camera.\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\u003eTarget System\u003c\/td\u003e\n\u003ctd\u003eRequired Back Focus \u0026amp; Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Multi-Purpose Coma Corrector\u003c\/td\u003e\n\u003ctd\u003e55mm, M48 Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTakahashi Epsilon Reflector Series\u003c\/td\u003e\n\u003ctd\u003e56mm, M54 Threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanon 35mm Lens\u003c\/td\u003e\n\u003ctd\u003e44.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNikon 35mm Lens\u003c\/td\u003e\n\u003ctd\u003e46.5mm\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\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942981988637,"sku":"QHY-020135-G1","price":84.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"qhyccd-qhy600sbfl-cfw3xl-adapter","title":"QHYCCD QHY600SBFL-CFW3XL Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects QHY600M SBFL Camera to QHYCFW3XL Filter Wheel\u003c\/li\u003e\n\u003cli\u003eResolves Mismatched Mounting Diameters\u003c\/li\u003e\n\u003cli\u003eProvides a Rigid, Stable Imaging Train Connection\u003c\/li\u003e\n\u003cli\u003eEngineered for a Precise Fit Between Components\u003c\/li\u003e\n\u003cli\u003eIncludes Required Mounting Hardware\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\u003eQHY600SBFL-CFW3XL Adapter\u003c\/h2\u003e\n      \u003cp\u003eThe QHY600SBFL-CFW3XL Adapter provides the specific mechanical interface required to connect the QHY600M SBFL (Short Back-Focus, Large Sensor) camera directly to the QHYCFW3XL extra-large filter wheel. This component ensures a secure, rigid attachment for a stable and reliable imaging train.\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\u003eSecure Connection for the QHY600M SBFL and QHYCFW3XL\u003c\/h3\u003e\n      \u003cp\u003eThe QHY600M SBFL camera and the QHYCFW3XL filter wheel feature mounting interfaces with different diameters, making a direct connection impossible. This adapter is purpose-built to bridge that mechanical mismatch, creating a seamless and robust link between your camera and filter wheel.\u003c\/p\u003e\n      \u003cp\u003eBy ensuring a precise fit, the adapter eliminates any potential for flexure or tilt at this critical junction. All necessary screws are provided to complete the installation, allowing you to quickly and confidently assemble your imaging setup.\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\u003eIs This Adapter for You? Comparing the QHYCFW3XL and QHYCFW3L Setups\u003c\/h3\u003e\n      \u003cp\u003eThis adapter is designed for a specific use case: imagers who already own a QHYCFW3XL filter wheel and wish to pair it with the QHY600M SBFL camera. It provides a reliable solution for integrating these existing components.\u003c\/p\u003e\n      \u003cp\u003eHowever, for those purchasing a new imaging system, QHYCCD recommends the standard \"QHY600 + QHYCFW3L\" combination. The smaller QHYCFW3L filter wheel and its compatible filter carousels are considered sufficient to meet the needs of most imagers using this full-frame sensor, offering a more streamlined and commonly supported configuration.\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 primary purpose of the QHY600SBFL-CFW3XL Adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter's sole function is to mechanically connect a \u003cstrong\u003eQHY600M SBFL camera\u003c\/strong\u003e to a \u003cstrong\u003eQHYCFW3XL extra-large filter wheel\u003c\/strong\u003e. It resolves the difference in diameter between the camera's mounting plate and the filter wheel's input.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need a special adapter for my QHY600M SBFL and QHYCFW3XL?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need this adapter because the joint parts on the QHY600M SBFL camera and the QHYCFW3XL filter wheel are not the same size. The adapter acts as a bridge, ensuring a secure, precise fit and preventing any instability in your imaging train.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI'm buying a new QHY600 camera. Should I get the QHYCFW3XL and this adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eQHYCCD generally recommends against this configuration for a new purchase. Unless you already own a QHYCFW3XL, the preferred setup is the \u003cstrong\u003eQHY600 camera combined with the QHYCFW3L filter wheel\u003c\/strong\u003e. That combination is sufficient for most imaging applications and does not require this adapter.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the QHY600SBFL-CFW3XL adapter include mounting screws?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, the adapter includes the necessary M3 screws to attach it securely between the QHY600M SBFL camera and the QHYCFW3XL filter wheel.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter work to connect a standard QHY600M camera to a QHYCFW3XL?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this adapter is specifically designed for the \u003cstrong\u003eQHY600M SBFL (Short Back-Focus) version\u003c\/strong\u003e of the camera. The standard QHY600M has a different mechanical interface and requires a different connection method.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow much back focus does the QHY600SBFL-CFW3XL Adapter add?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter adds a small, fixed amount of optical path length. While the exact thickness is not specified in the documentation, it is designed to create the correct spacing for the intended camera and filter wheel combination. Always measure your final imaging train to confirm back focus distances.\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      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \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":"Default Title","offer_id":52942982152477,"sku":"QHY-020123","price":28.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-QHY600SBFL-CFW3XL-Adapter-1_e97f1527-4ce8-41d7-8094-d93233d86aae.jpg?v=1789614760"},{"product_id":"qhyccd-5mm-m54-m54-threads-adapter","title":"QHYCCD 5mm M54-M54 Threads Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds exactly 5mm of optical path length\u003c\/li\u003e\n\u003cli\u003eConnects M54 threaded components\u003c\/li\u003e\n\u003cli\u003eMale and female M54x0.75 threads\u003c\/li\u003e\n\u003cli\u003eEssential for select QHY268M \u0026amp; QHY600M camera setups\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\u003e5mm M54-M54 Threads Adapter\u003c\/h2\u003e\n\u003cp\u003eThe 5mm M54-M54 Threads Adapter provides exactly 5mm of optical path length, allowing you to achieve precise back focus spacing in your imaging train. This adapter is a critical component for owners of QHY268M and QHY600M cameras who need to integrate M54 accessories like filter wheels or off-axis guiders.\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\u003eAchieve Precise 5mm Spacing for QHY Cameras\u003c\/h3\u003e\n\u003cp\u003eThis adapter addresses a common back focus requirement by adding a fixed 5mm of space to any M54 threaded connection. It is the official component included in the B1 and C1 adapter kits for the QHY268M and QHY600M-PH SBFL cameras shipped since June 2023. If you purchased your camera before this date or require a replacement, this adapter ensures you can achieve the correct spacing for a flat, sharp field with your specific optical configuration.\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\"\u003eDo I need the 5mm M54-M54 adapter for my QHY268M camera purchased in 2022?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eYes, very likely.\u003c\/strong\u003e This 5mm M54-M54 adapter was officially included in camera packages starting in June 2023. If you bought your QHY268M or QHY600M before that date and are using the B1\/C1 adapter configurations, you will need to purchase this part separately to achieve the correct back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the 5mm M54-M54 adapter to connect my QHY600M to an M54 filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would typically place the 5mm M54-M54 adapter between your camera's front plate and the filter wheel, or between the filter wheel and your flattener\/reducer. Its purpose is to consume 5mm of the optical path to help you reach the total back focus distance specified by your telescope's optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the exact spacing provided by this 5mm M54-M54 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter provides exactly \u003cstrong\u003e5mm\u003c\/strong\u003e of spacing (optical path length). It is precision-machined to this tolerance to ensure accurate back focus calculations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the thread types on the 5mm M54-M54 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter has M54 female threads on one side and M54 male threads on the other. This allows it to act as a simple extension, connecting two components that both have M54 threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 5mm M54-M54 adapter included with new QHY cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, since June 2023, the 5mm M54-M54 adapter is included as part of the Combo B1 and C1 adapter kits that ship with the QHY268M-PH SBFL and QHY600M-PH SBFL camera packages. This listing is for users who need to purchase it separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a 5mm spacer like this M54-M54 adapter important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eModern correctors, flatteners, and reducers require a very specific distance to the camera sensor to produce sharp stars across the entire field of view. An error of even a millimeter can introduce distortion. A 5mm spacer like this adapter is a fundamental tool for precisely hitting that target distance when the camera and other accessories don't add up to the exact number required.\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\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreads\u003c\/td\u003e\n\u003ctd\u003eM54x0.75 Male to M54x0.75 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Compatibility\u003c\/td\u003e\n\u003ctd\u003eQHY268M \/ QHY600M-PH SBFL Cameras (Adapter Kits B1 \u0026amp; C1)\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\"\u003e5mm M54-M54 Threads 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\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942983069981,"sku":"QHY-020134","price":11.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-5mm-M54-M54-Threads-Adapter-1_e1780e8e-aa55-4ebf-946c-5784c1905c12.jpg?v=1789614776"},{"product_id":"qhyccd-caa-top-adapter-with-m54-mount","title":"QHYCCD CAA (Top Adapter with M54 Mount)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConverts a QHYCCD dovetail to an M54 thread\u003c\/li\u003e\n\u003cli\u003eAdds precisely 6mm of optical path length\u003c\/li\u003e\n\u003cli\u003eEnables connection to M54 spacers, adapters, and accessories\u003c\/li\u003e\n\u003cli\u003eCompatible with QHY600C, QHY410C, QHY367C and other color cameras\u003c\/li\u003e\n\u003cli\u003eIncluded with the QHYCFW3L 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\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\u003eCAA (Top Adapter with M54 Mount)\u003c\/h2\u003e\n\u003cp\u003eThe QHYCCD CAA is a dovetail adapter ring that provides an M54 threaded connection for compatible cameras, adding exactly 6mm of optical path length to your imaging train. This adapter is specifically designed for QHYCCD color cameras with a native 17.5mm back focus, such as the QHY600C and QHY410C, creating a secure and standardized mounting point for M54 spacers and other telescope 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\u003eStandardize Your Imaging Train: The 6mm M54 Adapter\u003c\/h3\u003e\n\u003cp\u003eThe primary function of the CAA is to convert the camera's native dovetail connection into an M54 thread. This allows you to build a rigid and reliable imaging train using common M54-threaded components. The adapter consumes a fixed 6mm of back focus, a critical measurement to factor into your optical calculations to ensure you can reach focus with your specific reducer 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\u003eSystem Integration: Compatibility with QHYCFW3L and Color Cameras\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the same component QHYCCD includes with its QHYCFW3L 7-position filter wheel, listed as the \"CAA (Dovetail Ring to M54)\". It serves as a direct replacement or as a standalone part for custom configurations. It is essential for achieving the correct spacing on a range of popular QHYCCD color cameras.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cameras:\u003c\/strong\u003e The CAA is designed for use with the QHY600C, QHY410C, QHY367C, QHY128C, QHY247C, and QHY168C models.\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 primary function of the QHYCCD CAA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHYCCD CAA is a mechanical adapter that converts the dovetail ring on certain QHYCCD cameras into a standard \u003cstrong\u003eM54 female thread\u003c\/strong\u003e. This allows you to securely attach M54-threaded accessories like spacers, filter wheels, or off-axis guiders to your camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much back focus does the QHYCCD CAA add?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHYCCD CAA adds exactly \u003cstrong\u003e6mm\u003c\/strong\u003e of optical path length. When attached to a camera with a native 17.5mm back focus (like the QHY600C), the total back focus from the CAA's M54 thread to the sensor becomes 23.5mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich QHYCCD cameras is the CAA adapter compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CAA is designed for specific QHYCCD color cameras that use the dovetail mounting system. Confirmed compatible models include the \u003cstrong\u003eQHY600C, QHY410C, QHY367C, QHY128C, QHY247C, and QHY168C\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI own a QHYCFW3L filter wheel. Do I need to buy the QHYCCD CAA separately?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, you likely do not. QHYCCD includes one CAA adapter in the box with the \u003cstrong\u003eQHYCFW3L filter wheel\u003c\/strong\u003e. This part is offered separately as a spare or for users who are building custom imaging trains without that specific filter wheel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the QHYCCD CAA to connect my QHY168C to an M54 reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The CAA provides the necessary M54 female thread to start your connection. After attaching the CAA to your QHY168C, you can add M54 spacers to achieve the precise back focus distance required by your reducer or flattener.\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\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eDovetail Ring to Female Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-Side Connection\u003c\/td\u003e\n\u003ctd\u003eQHYCCD Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-Side Connection\u003c\/td\u003e\n\u003ctd\u003eM54 Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Path Length\u003c\/td\u003e\n\u003ctd\u003e6mm\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\"\u003eCAA (Top Adapter with M54 Mount)\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\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942983397661,"sku":"QHY-020116","price":35.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-CAA-Top-Adapter-with-M54-Mount-1_5d182ffa-dfd9-471f-8c1e-6b6ec4063ecd.jpg?v=1789614792"},{"product_id":"qhyccd-combo-e1","title":"QHYCCD Adapter Kit - Combo E1","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects select QHY cameras to M48 threaded accessories\u003c\/li\u003e\n\u003cli\u003eAchieves the industry-standard 55mm back focus distance\u003c\/li\u003e\n\u003cli\u003eCompatible with QHY533C, QHY294C, QHY163C, and QHY183C cameras\u003c\/li\u003e\n\u003cli\u003eIncludes three custom adapters and one 0.5mm spacer for fine adjustment\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\u003eAdapter Kit - Combo E1\u003c\/h2\u003e\n\u003cp\u003eThe Adapter Kit - Combo E1 provides the essential components to connect your QHY294C, QHY163C, QHY183C, or QHY533C camera to any M48 threaded corrector or accessory requiring a standard 55mm back focus distance.\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\u003eStandardize Your Imaging Train at 55mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eMost popular coma correctors and field flatteners are designed with a rigid 55mm back focus requirement for optimal performance. This E1 adapter kit includes three custom-machined adapters and a 0.5mm spacer, giving you the exact combination needed to perfectly match this critical distance with compatible QHY cameras. The system provides a direct, secure connection to M48 (2-inch filter) threads, eliminating tilt and ensuring a solid imaging train.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Spacing:\u003c\/strong\u003e The combination of three distinct adapters and a 0.5mm fine-tuning spacer ensures you can achieve the target 55mm distance accurately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono Camera Use:\u003c\/strong\u003e While designed for color cameras, this kit is also suitable for their mono counterparts (e.g., QHY163M, QHY294M) when a filter wheel or off-axis guider is not part of the imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDSLR Lens Ready:\u003c\/strong\u003e The kit can serve as the foundation for attaching your QHY camera to Canon EF or Nikon F-mount lenses, though this requires an additional third-party lens-to-M48 adapter (sold separately).\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 primary function of the Adapter Kit - Combo E1?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary function of the \u003cstrong\u003eAdapter Kit - Combo E1\u003c\/strong\u003e is to set the correct \u003cstrong\u003e55mm back focus distance\u003c\/strong\u003e between a compatible QHY camera (like the QHY533C or QHY294C) and an M48 threaded accessory, such as a coma corrector or field flattener. This precise spacing is critical for achieving sharp, aberration-free stars across the entire field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich QHY cameras does the Combo E1 Adapter Kit support?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Combo E1 Adapter Kit is specifically designed for the following QHY color cameras: \u003cstrong\u003eQHY533C, QHY294C, QHY163C, and QHY183C\u003c\/strong\u003e. It can also be used with the monochrome versions of these cameras if you are not using a filter wheel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Adapter Kit - Combo E1 to connect my QHY533C to a coma corrector with M48 threads?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will select the appropriate combination of the three included adapters to bridge the gap between the QHY533C's sensor and the 55mm requirement of your M48 coma corrector. The specific combination depends on your camera's native back focus. The included 0.5mm spacer can be added or removed for fine-tuning to achieve perfect correction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI want to use my QHY163M with an f\/4 Newtonian's coma corrector, but without a filter wheel. Is the Combo E1 kit right for this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003eAdapter Kit - Combo E1\u003c\/strong\u003e is perfectly suited for this scenario. Since you are not using a filter wheel, which would consume a significant amount of back focus, this kit will provide the correct spacing to connect your QHY163M directly to the coma corrector and achieve the required 55mm distance for optimal performance in your f\/4 Newtonian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Adapter Kit - Combo E1 include the adapter for a Canon or Nikon DSLR lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. While the Combo E1 kit can be part of a solution for attaching DSLR lenses, it \u003cstrong\u003edoes not include the main lens mount adapter\u003c\/strong\u003e. You will need to purchase a separate M48 to Canon EF or M48 to Nikon F adapter to complete the connection.\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 0.5mm spacer in the Combo E1 kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.5mm spacer\u003c\/strong\u003e is included for fine-tuning the back focus distance. While the main adapters get you very close to the target 55mm, slight variations in manufacturing tolerances of other components can affect the final spacing. The 0.5mm spacer allows you to make precise micro-adjustments to achieve the sharpest possible stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Cameras\u003c\/td\u003e\n\u003ctd\u003eQHY294C \/ QHY163C \/ QHY183C \/ QHY533C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Connection\u003c\/td\u003e\n\u003ctd\u003e55mm Back Focus via M48 Threads\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\"\u003eCustomized Adapters\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\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\"\u003e0.5mm Spacer\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\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942991393053,"sku":"QHY-020119","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-Adapter-Kit-Combo-E1-1_7967ac8d-c5a0-443c-9234-2a66fc2cc216.jpg?v=1789615050"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/qhyccd-adapters.oembed","provider":"David Astro","version":"1.0","type":"link"}