{"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":8.0,"currency_code":"USD","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","url":"https:\/\/davidastro.com\/fr-us\/products\/qhyccd-5mm-m54-m54-threads-adapter","provider":"David Astro","version":"1.0","type":"link"}