{"title":"Adaptateurs Player One","description":"\u003cp\u003eLes adaptateurs Player One relient caméras, tiroirs à filtres et diviseurs optiques en un train optique rigide avec le bon backfocus. La gamme couvre les filetages M42, M48 et M54 en longueurs fixes de 0mm à 20mm, ainsi que des changeurs de genre.\u003c\/p\u003e\u003cp\u003eLes adaptateurs Rotolock 2\" vers 1.25\" et M42 vers 1.25\" permettent de centrer et de tourner une caméra dans le porte-oculaire, et un adaptateur CS-M42 et une rallonge 1.25\" servent aux petites configurations.\u003c\/p\u003e","products":[{"product_id":"player-one-m54m-m68f-17-5mm-extender","title":"Player One M54M-M68F Adapter - 17.5mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M54 Male Threads to M68 Female Threads\u003c\/li\u003e\n\u003cli\u003eAdds a Fixed 17.5mm Optical Path Length\u003c\/li\u003e\n\u003cli\u003eMachined for Rigidity and Precise Alignment\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish to Minimize Reflections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M54M-M68F Adapter - 17.5mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M54M-M68F Adapter provides a secure, rigid connection between accessories with M54 male threads and components requiring a female M68 thread. This adapter adds a precise 17.5mm of optical path length, essential for building an exact imaging train and achieving correct back focus.\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\u003eBridging M54 and M68 Thread Standards\u003c\/h3\u003e\n\u003cp\u003eThis adapter creates a critical mechanical link between two common, but incompatible, thread sizes in astrophotography. It allows you to connect accessories with an M54 male thread, such as those on many Player One cameras and filter wheels, to focusers, rotators, or field correctors that utilize the larger M68 female thread standard.\u003c\/p\u003e\n\u003cp\u003eBy providing a fixed, non-adjustable 17.5mm extension, it helps achieve the specific back focus distance required by your optical system. Its rigid, all-metal construction prevents flexure, maintaining perfect optical alignment even with heavier cameras or accessories.\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 use for the Player One M54M-M68F Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed to connect two different thread standards, allowing you to attach an accessory with M54 male threads to a telescope, rotator, or corrector that has M68 female threads. It also adds a fixed 17.5mm of length to the optical path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich direction does the Player One M54M-M68F Adapter convert?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt features an \u003cstrong\u003eM54 male thread\u003c\/strong\u003e on one side and an \u003cstrong\u003eM68 female thread\u003c\/strong\u003e on the other. This configuration adapts smaller M54-based components to larger M68-threaded accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Player One M54M-M68F Adapter suitable for heavy imaging trains?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. It is machined from metal to provide a rigid, secure connection that minimizes flexure, making it suitable for supporting typical astrophotography camera and filter wheel combinations without compromising alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Player One M54M-M68F Adapter affect back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter adds a fixed \u003cstrong\u003e17.5mm of length\u003c\/strong\u003e to your optical path. You must include this distance in your total back focus calculation to ensure your field flattener or reducer performs correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy Player One camera has M54 threads but my new rotator uses M68. Will the M54M-M68F Adapter work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a perfect use case for this adapter. It will allow you to securely attach your M54-threaded camera to the M68-threaded rotator, creating a stable connection while adding 17.5mm to the spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Player One M54M-M68F adapter with a large refractor's field flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMany large-format field flatteners for refractors terminate in an M68 thread to prevent vignetting. This adapter allows you to connect a camera or filter wheel with a smaller M54 thread to that flattener, forming part of a rigid, threaded imaging train.\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\u003eM54 Male to M68 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM68 x 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e17.5mm\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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlayer One M54M-M68F Adapter (17.5mm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002273956125,"sku":"POA-M54M-M68F-17.5","price":55.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M54M-M68F-17.5-1.jpg?v=1772674130"},{"product_id":"player-one-m48m-m54m-adapter-17-5mm","title":"Player One M48F-M54M Adapter - 17.5mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides a precise 17.5mm of optical length\u003c\/li\u003e\n\u003cli\u003eConnects M48x0.75 female threads to M54x0.75 male threads\u003c\/li\u003e\n\u003cli\u003eEnables use of 2-inch filters in larger M54 imaging trains\u003c\/li\u003e\n\u003cli\u003eMachined for a secure, tilt-free connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M48F-M54M Adapter - 17.5mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M48F-M54M Adapter provides exactly 17.5mm of optical path length, converting a male M54x0.75 thread to a female M48x0.75 thread. This component is essential for achieving precise back focus when connecting M48-threaded accessories, such as 2-inch filter wheels or drawers, to imaging trains that terminate in a larger M54 thread.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision 17.5mm Spacing: Integrating M48 Accessories into an M54 Imaging Train\u003c\/h3\u003e\n\u003cp\u003eThis adapter solves a common connection problem for imagers using mixed-thread components. It allows you to integrate accessories built around the ubiquitous M48 (2-inch filter) thread standard into an optical path designed for larger M54 correctors, off-axis guiders, or camera ports.\u003c\/p\u003e\n\u003cp\u003eThe fixed 17.5mm length is a standard increment used in back focus calculations, often in combination with other spacers to reach a flattener's required 55mm distance. Its rigid, machined construction ensures that your imaging components remain perfectly collinear, preventing tilt that can compromise edge-of-field star shapes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Thread Conversion:\u003c\/strong\u003e Adapts the common M48x0.75 female thread found on filter wheels and correctors to the M54x0.75 male thread used on larger focusers and cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed 17.5mm Extension:\u003c\/strong\u003e Provides a precise, non-negotiable 17.5mm of spacing, simplifying back focus calculations by removing guesswork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Connection:\u003c\/strong\u003e Machined threads ensure a rigid, tilt-free connection between critical optical components, which is vital for maintaining a flat field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for the Player One M48F-M54M 17.5mm Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary function is to connect an accessory with M48 male threads (like a filter drawer or the camera-side of a flattener) to a component with an M54 female port (like a large off-axis guider or focuser drawtube), while adding exactly \u003cstrong\u003e17.5mm\u003c\/strong\u003e to the optical path for back focus purposes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Player One 17.5mm adapter help achieve correct back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMany field flatteners and coma correctors require a precise 55mm distance to the sensor. This \u003cstrong\u003e17.5mm adapter\u003c\/strong\u003e is a common length used in combination with other standard spacers and the camera's own flange distance to precisely hit that critical target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Player One filter wheel with M48 threads and a corrector with an M54 port. Is this the right adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a very common application for this adapter. The M48 female side will thread onto your filter wheel's male threads, and the M54 male side of the adapter will connect to your corrector, providing 17.5mm of spacing. Always confirm your total back focus calculation to ensure this is the correct length for your specific setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Player One M48F-M54M adapter accept standard 2-inch astronomy filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The female thread is \u003cstrong\u003eM48x0.75\u003c\/strong\u003e, which is the international standard for mounting 2-inch astronomical filters. You can thread a filter directly into the female side of this adapter if needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy camera has 17.5mm of back focus. Can I use this Player One adapter to connect directly to an M54 flattener that needs 55mm spacing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, not by itself. If the flattener requires 55mm of spacing and your camera already provides 17.5mm, you need a total of 37.5mm of spacers (55 - 17.5 = 37.5). This 17.5mm adapter would be one part of that solution, but you would still need an additional 20mm of spacers in the imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the threads on the Player One 17.5mm adapter M48x0.75 or M48x0.6?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe female thread is \u003cstrong\u003eM48x0.75\u003c\/strong\u003e, the standard for 2-inch astronomical filters and accessories. The male thread is \u003cstrong\u003eM54x0.75\u003c\/strong\u003e.\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\u003eM48 Female to M54 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM54x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e17.5mm\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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlayer One M48F-M54M Adapter (17.5mm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002298630429,"sku":"POA-M48F-M54M-17.5","price":41.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M48F-M54M-17.5-1.jpg?v=1772674096"},{"product_id":"player-one-m54m-m54f-adapter-20mm","title":"Player One M54M-M54F Adapter - 20mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 20mm of extension to an optical train\u003c\/li\u003e\n\u003cli\u003eConnects M54 x 0.75 male to M54 x 0.75 female threads\u003c\/li\u003e\n\u003cli\u003ePrecision-machined for a secure, tilt-free fit\u003c\/li\u003e\n\u003cli\u003eMatte black anodized finish minimizes internal reflections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003ePlayer One M54M-M54F Adapter - 20mm\u003c\/h2\u003e\n      \u003cp\u003eThe Player One M54M-M54F Adapter adds a fixed 20mm of length to optical trains built on the M54 thread standard. It features a male M54 x 0.75 thread on one side and a female M54 x 0.75 thread on the other, creating a rigid and light-tight connection for cameras, filter wheels, and other accessories.\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\u003eAchieve Critical 20mm Spacing in M54 Imaging Trains\u003c\/h3\u003e\n      \u003cp\u003eHitting the precise back focus distance required by a field flattener or reducer is non-negotiable for sharp, coma-free stars. This 20mm adapter is a fundamental building block for dialing in that spacing, allowing you to correctly position your camera sensor relative to your corrective optics. Its rigid, single-piece construction prevents the flexure and tilt that can occur when stacking thinner, less stable spacers.\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 use for the Player One M54M-M54F 20mm Adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter serves as a rigid extender to help achieve the correct back focus distance in an imaging train. It is commonly used to connect a camera to a filter wheel or an off-axis guider to a telescope's focuser, adding exactly \u003cstrong\u003e20mm\u003c\/strong\u003e of spacing to meet the requirements of a flattener or reducer.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if I need a 20mm adapter for my Player One camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need to calculate the total back focus of your optical train. Start with the back focus requirement of your flattener or reducer (e.g., 55mm). Then, subtract the back focus of your camera and any accessories like filter wheels or off-axis guiders. If the remaining distance is 20mm, this adapter is the correct component to complete your imaging train.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI'm using a Celestron EdgeHD with a 0.7x reducer and need to achieve 146mm of back focus. Can the Player One 20mm adapter be part of this solution?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. The 146mm back focus requirement for the EdgeHD reducer is a common scenario. The Player One 20mm adapter is often combined with other spacers (like a 50mm and various smaller rings) and accessories (like an OAG and filter wheel) to precisely reach that 146mm distance from the reducer's threads to the camera sensor.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the exact threads on the Player One M54 adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter uses the standard \u003cstrong\u003eM54 x 0.75mm\u003c\/strong\u003e thread pitch. It has male threads on one side and female threads on the other, allowing it to function as an extension tube between two M54-threaded accessories.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack multiple Player One 20mm adapters to achieve 40mm of spacing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, you can thread two of these adapters together to create 40mm of extension. However, for longer distances, it is generally recommended to use a single, longer extension tube if possible. Using a single piece minimizes the number of threaded connections, reducing the potential for accumulated tilt in the optical train.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 20mm M54 adapter cause vignetting with my full-frame camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe M54 thread standard has a large enough clear aperture to fully illuminate most full-frame sensors (42mm image circle) without causing vignetting. This adapter maintains that clear aperture, making it a safe choice for use with full-frame cameras like the Player One Poseidon series, provided the rest of your optical train is also designed for full-frame coverage.\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\u003eThreads\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75 Male to M54 x 0.75 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e20mm\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\"\u003ePlayer One M54M-M54F Adapter (20mm)\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\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002308034845,"sku":"POA-M54M-M54F-20","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M54M-M54F-20-1.jpg?v=1772674077"},{"product_id":"player-one-m54m-m54f-adapter-17-5mm","title":"Player One M54M-M54F Adapter - 17.5mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Length (17.5mm):\u003c\/strong\u003e Adds a fixed 17.5mm of spacing, a common requirement for achieving 55mm back focus with filter wheels and off-axis guiders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54x0.75 Threads:\u003c\/strong\u003e Features both male and female M54x0.75 threads, the standard for full-frame cameras and correctors, ensuring a wide, unvignetted light path.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid Connection:\u003c\/strong\u003e Provides a non-flexing extension, maintaining optical alignment more securely than variable or sliding adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight Design:\u003c\/strong\u003e Adds minimal weight to the imaging train, reducing the potential for focuser sag or balance issues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M54M-M54F Adapter - 17.5mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M54M-M54F Adapter creates a precise 17.5mm of optical path extension for imaging trains using the M54x0.75 thread standard. This component is essential for achieving exact back focus distances required by field flatteners and focal reducers, particularly when assembling a full-frame imaging system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eM54 Extension Adapter: Adding 17.5mm of Back Focus\u003c\/h3\u003e\n\u003cp\u003eThis adapter is a fundamental component for assembling a rigid, correctly spaced imaging train. It provides a fixed 17.5mm extension, which is often the exact distance needed to bridge the gap between a corrector and a filter wheel or off-axis guider to reach the standard 55mm back focus distance.\u003c\/p\u003e\n\u003cp\u003eUtilizing the M54x0.75 thread standard, this adapter is designed for full-frame imaging systems. The large-diameter threads prevent vignetting that can occur with smaller M48 adapters when using sensors with a large diagonal, ensuring your flat frames are even and your stars are sharp to the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Player One M54M-M54F 17.5mm adapter to achieve standard 55mm back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is a key part of the back focus calculation. For example, if your camera has 17.5mm of native back focus and your filter wheel\/OAG assembly has a 20mm optical path, adding this 17.5mm adapter will bring your total spacing to exactly 55mm (17.5mm + 20mm + 17.5mm). Always calculate the total optical path of all components in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 17.5mm adapter compatible with a ZWO full-frame filter wheel and an ASI6200 camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The M54x0.75 threads are directly compatible with ZWO's M54 filter wheels and full-frame cameras like the ASI6200 or ASI2600 series. This adapter is a common solution for achieving the correct 55mm spacing in such a setup, connecting the corrector to the filter wheel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the threads on the Player One 17.5mm M54 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter has \u003cstrong\u003eM54x0.75 male threads\u003c\/strong\u003e on one side and \u003cstrong\u003eM54x0.75 female threads\u003c\/strong\u003e on the other. This allows it to function as a simple extension tube between any two M54-threaded accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack multiple Player One 17.5mm adapters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile physically possible, it is not recommended. Stacking multiple threaded adapters can introduce opportunities for tilt in the imaging train. For maximum rigidity and alignment, it is always best to use a single spacer of the correct length whenever possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this M54 adapter cause vignetting with my full-frame sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The M54 thread standard provides a clear aperture large enough to fully illuminate full-frame sensors (36mm x 24mm) without vignetting. This is its primary advantage over smaller M48 adapters, which can clip the light cone on large sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I choose a fixed 17.5mm adapter instead of an adjustable spacer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA fixed adapter like this provides a more rigid and stable connection. Adjustable spacers can sometimes introduce sensor tilt or flex under the weight of a heavy camera. If you know you need exactly 17.5mm of spacing, a fixed adapter is the most reliable option for maintaining perfect optical alignment.\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\u003e17.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eExtension Tube \/ Spacer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002310033693,"sku":"POA-M54M-M54F-17.5","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M54M-M54F-17.5-1.jpg?v=1772674068"},{"product_id":"player-one-m68-adapter-for-fhd-oag-max","title":"Player One M68 Adapter for FHD-OAG MAX","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Player One FHD-OAG MAX to M68x1 Threads\u003c\/li\u003e\n\u003cli\u003eM68x1 Female Thread\u003c\/li\u003e\n\u003cli\u003eProvides a Secure, Rigid Connection\u003c\/li\u003e\n\u003cli\u003eEliminates Potential Flexure in the Imaging Train\u003c\/li\u003e\n\u003cli\u003eDesigned Specifically for the FHD-OAG MAX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M68 Adapter for FHD-OAG MAX\u003c\/h2\u003e\n\u003cp\u003eThe Player One M68 Adapter for FHD-OAG MAX creates a secure, threaded connection between your off-axis guider and any telescope or flattener equipped with a male M68x1 thread.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSecure Your Imaging Train with the M68x1 Standard\u003c\/h3\u003e\n\u003cp\u003eThis adapter is the purpose-built link for integrating the Player One FHD-OAG MAX into imaging trains that use the M68x1 thread standard. Directly and rigidly attach your off-axis guider to compatible field flatteners, reducers, or focusers, eliminating the potential for flexure from less secure connection methods. The female M68x1 thread ensures a precise fit with your existing M68 male-threaded accessories.\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 Player One M68 Adapter for FHD-OAG MAX used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed to connect the \u003cstrong\u003ePlayer One FHD-OAG MAX\u003c\/strong\u003e to a telescope, field flattener, or reducer that has a male \u003cstrong\u003eM68x1 thread\u003c\/strong\u003e. It provides a secure, rigid attachment point for your off-axis guider within the imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my Player One FHD-OAG MAX to my refractor's M68 focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is the exact component you need. The adapter's female M68x1 threads screw directly onto the male M68 threads of your focuser's drawtube, providing the correct mechanical interface to mount the FHD-OAG MAX.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the thread specifications for this FHD-OAG MAX adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter features a female \u003cstrong\u003eM68x1 thread\u003c\/strong\u003e on the telescope side. The other side has a proprietary connection designed to mate perfectly with the Player One FHD-OAG MAX.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Player One M68 adapter with a ZWO M68 OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This adapter is specifically designed for the mechanical interface and body of the Player One FHD-OAG MAX. It will not provide a secure or correct connection for off-axis guiders from other manufacturers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a field flattener with an M68x1 output thread. Will this adapter work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a primary application for the adapter. It allows you to thread your FHD-OAG MAX directly and securely onto the field flattener, ensuring a rigid imaging train for sharp, guided exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this the same as a generic M68 to M48 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. While one side is a standard M68x1 female thread, the other side is a specific mounting interface for the Player One FHD-OAG MAX. It is not a standard M48 or other universal thread type.\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\u003eTelescope Side Thread\u003c\/td\u003e\n\u003ctd\u003eM68x1 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003ePlayer One FHD-OAG MAX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eM68 Adapter for FHD-OAG MAX\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002314064157,"sku":"POA-M68-RING","price":41.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M68-RING-1.jpg?v=1772673979"},{"product_id":"player-one-m48m-m48f-adapter-17-5mm","title":"Player One M48M-M48F Adapter - 17.5mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 17.5mm of optical path length\u003c\/li\u003e\n\u003cli\u003eConnects M48x0.75 male to M48x0.75 female threads\u003c\/li\u003e\n\u003cli\u003eStandard M48 threading is compatible with 2\" filters\u003c\/li\u003e\n\u003cli\u003eMachined for precise and secure connections\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\u003ePlayer One M48M-M48F Adapter - 17.5mm\u003c\/h2\u003e\n      \u003cp\u003eThe Player One M48M-M48F Adapter provides exactly 17.5mm of extension, a critical component for achieving precise back focus in an astrophotography setup. This adapter uses the standard M48x0.75 thread pitch, ensuring a secure, non-vignetting connection between your camera and field flattener, reducer, or off-axis guider.\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\u003eAchieving 17.5mm of Back Focus with M48x0.75 Threads\u003c\/h3\u003e\n      \u003cp\u003eCorrect spacing is non-negotiable for sharp stars edge-to-edge, and this 17.5mm extender is a fundamental tool for hitting the common 55mm back focus standard. When your camera's sensor-to-flange distance (e.g., 17.5mm on many Player One cameras) and filter wheel thickness don't add up perfectly, this adapter fills the gap precisely. The M48 (48mm) diameter provides a larger clear aperture than older T2\/M42 threads, minimizing the risk of vignetting on sensors up to full-frame size.\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 Player One M48M-M48F 17.5mm adapter primarily used for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter is a \u003cstrong\u003eprecision spacer\u003c\/strong\u003e, designed to add exactly 17.5mm of length to an M48-threaded imaging train. Its primary purpose is to help you achieve the exact back focus distance required by your field flattener or focal reducer, which is often 55mm.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if I need this 17.5mm adapter for my imaging setup?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need to calculate your current back focus. Add your camera's sensor-to-flange distance, the thickness of your filter wheel or drawer, and any other adapters. If this total is less than the required back focus of your flattener\/reducer (e.g., 55mm), you need a spacer. This 17.5mm adapter is a common length needed to complete that distance.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eAre the M48x0.75 threads on the Player One adapter compatible with 2\" astronomy filters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The M48x0.75 thread pitch is the standard for 2\" astronomy filters. This means you can thread this adapter directly onto filter cells, filter wheels, and other accessories that use the 2\" filter standard, ensuring broad compatibility.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack the Player One 17.5mm adapter with other M48 spacers?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, you can stack multiple M48 spacers to achieve a custom length. However, be aware that each threaded connection is a potential point for flexure or tilt. For optimal rigidity, it is always best to use a single spacer of the correct length whenever possible.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Player One 17.5mm adapter help me image the Andromeda Galaxy (M31) with a refractor and flattener?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, indirectly. While the adapter itself doesn't affect the image, it ensures your field flattener works correctly. Without the right spacing, like the 17.5mm this provides, you would see elongated stars in the corners of your image of M31. By correcting the spacing, this adapter enables your optics to produce sharp 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\"\u003eMy SCT with a reducer requires 105mm of back focus. Can I use this Player One adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, you can use the 17.5mm adapter as part of the total 105mm distance. You would combine it with your camera, off-axis guider, and other M48 extension tubes to build up the full 105mm required by the SCT reducer for optimal performance.\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\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e17.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM48 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM48 x 0.75\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\"\u003ePlayer One M48M-M48F 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\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002485047581,"sku":"POA-M48F-M48M-17.5","price":34.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M48F-M48M-17.5-1.jpg?v=1772678050"},{"product_id":"player-one-m48f-m48m-adapter-20mm","title":"Player One M48F-M48M Adapter - 20mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds exactly 20mm of optical length\u003c\/li\u003e\n\u003cli\u003eM48x0.75 female (input) and male (output) threads\u003c\/li\u003e\n\u003cli\u003eMaintains a rigid connection in the imaging train\u003c\/li\u003e\n\u003cli\u003eStandard 2-inch filter thread compatibility\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\u003ePlayer One M48F-M48M Adapter - 20mm\u003c\/h2\u003e\n      \u003cp\u003eThe Player One M48F-M48M Adapter provides a fixed 20mm extension for any optical train using the M48x0.75 thread standard. This essential component allows you to achieve the precise back focus distance required by field flatteners, reducers, and coma correctors, ensuring sharp stars across the entire image field.\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\u003eAchieve Precise 20mm Back Focus for Flat Fields\u003c\/h3\u003e\n      \u003cp\u003eModern correctors demand exact spacing to deliver their designed optical correction. This adapter adds a non-negotiable 20mm to your back focus, filling a common gap between a camera's native flange distance and the typical 55mm requirement of many flatteners and reducers. Using a fixed, threaded extender like this is more rigid and reliable than using adjustable spacers, preventing tilt and maintaining optical alignment.\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\u003eUniversal M48x0.75 Threads for 2-Inch Accessories\u003c\/h3\u003e\n      \u003cp\u003eFeaturing standard M48x0.75 female threads on one side and male threads on the other, this adapter is a universal fit for most imaging setups. The M48 thread, often called the 2-inch filter thread, ensures compatibility with a wide range of accessories, including filter wheels, off-axis guiders, and camera-specific adapters, without causing vignetting on sensors up to full-frame size.\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 exact function of the Player One 20mm M48 adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Player One M48F-M48M Adapter is a rigid extender that adds exactly \u003cstrong\u003e20mm of length\u003c\/strong\u003e to your imaging train. Its primary purpose is to help you achieve the precise back focus distance specified by your field flattener or reducer, which is critical for achieving sharp stars to the edge of your images.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eMy flattener requires 55mm of back focus and my camera has a 17.5mm flange distance. How does the Player One 20mm adapter help?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIn this common scenario, you need to add 37.5mm of spacing (55mm - 17.5mm). The Player One 20mm M48 adapter can be a key part of this solution. You would combine this 20mm adapter with other spacers (e.g., a 16.5mm and a 1mm) to precisely hit your target distance.\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 Player One 20mm M48 adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter uses the standard \u003cstrong\u003eM48x0.75 thread\u003c\/strong\u003e on both sides. It has female (internal) threads on the telescope\/corrector side and male (external) threads on the camera side, allowing it to be inserted directly into any M48-threaded imaging train.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Player One 20mm M48 adapter cause vignetting on a full-frame camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The M48 thread standard is designed to provide a clear aperture large enough to illuminate full-frame sensors (36mm x 24mm) without introducing additional vignetting. Any vignetting in your final image would be from other components in your optical path, not this 20mm adapter.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I thread 2-inch filters into the Player One M48 adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The M48x0.75 female thread is the same standard used for 2-inch astronomy filters. You can thread a 2-inch filter directly into the female side of the adapter, which can be useful for placing a filter at a specific distance from the sensor.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs using the Player One 20mm M48 adapter better than a variable spacer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor a fixed distance like 20mm, a solid, non-adjustable adapter is generally superior. Fixed adapters provide a more rigid and stable connection, which is less prone to tilt than variable or helical spacers. This rigidity is crucial for maintaining a flat field with heavy cameras.\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\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInput Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOutput Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002515521821,"sku":"POA-M48F-M48M-20","price":34.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M48F-M48M-20-1.jpg?v=1772678300"},{"product_id":"player-one-m42f-m42m-adapter-20mm","title":"Player One M42F-M42M Adapter - 20mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides a fixed 20mm spacing extension\u003c\/li\u003e\n\u003cli\u003eFemale Thread: M42 x 0.75\u003c\/li\u003e\n\u003cli\u003eMale Thread: M42 x 0.75\u003c\/li\u003e\n\u003cli\u003eCorrects back focus for flatteners and reducers\u003c\/li\u003e\n\u003cli\u003eStandard T-Thread compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M42F-M42M Adapter - 20mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M42F-M42M Adapter provides a fixed 20mm extension for standard M42x0.75 threaded imaging trains. This 20mm spacer is an essential component for achieving the precise back focus distance specified by field flatteners and focal reducers, ensuring sharp, well-corrected stars across the entire image frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision 20mm M42 Extension for Back Focus Tuning\u003c\/h3\u003e\n\u003cp\u003eThe primary function of a 20mm extension is to correctly set the distance between your camera's sensor and an optical corrector. Most flatteners and reducers require a specific back focus, often 55mm, and this adapter helps bridge the gap between your camera's native flange distance and that critical target measurement.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Focus Correction:\u003c\/strong\u003e Adds a fixed 20mm to your optical train, making it a key part of the calculation for hitting the 55mm standard or other custom spacing requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessory Spacing:\u003c\/strong\u003e Creates necessary clearance between components, such as preventing a filter wheel from colliding with a focuser or a large camera body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal T-Threads:\u003c\/strong\u003e Utilizes the M42x0.75 thread standard (also known as T-threads or T2), ensuring broad compatibility with nearly all dedicated astronomy cameras, filter wheels, and off-axis guiders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Player One 20mm M42 adapter to achieve 55mm of back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou use it as part of the total back focus calculation. For example, if your camera has a \u003cstrong\u003e17.5mm\u003c\/strong\u003e flange distance, you would add this \u003cstrong\u003e20mm\u003c\/strong\u003e adapter plus another \u003cstrong\u003e17.5mm\u003c\/strong\u003e of spacers to reach the required \u003cstrong\u003e55mm\u003c\/strong\u003e (17.5 + 20 + 17.5 = 55). It provides a solid, single component for a significant portion of that distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy flattener needs 55mm back focus and my camera has 17.5mm. What else do I need with this 20mm adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAfter accounting for your camera (17.5mm) and this adapter (20mm), you have used 37.5mm of the required 55mm. You would need an additional \u003cstrong\u003e17.5mm\u003c\/strong\u003e of spacers (55 - 37.5 = 17.5) to complete the imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the threads on the Player One 20mm Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter features standard \u003cstrong\u003eM42x0.75 T-threads\u003c\/strong\u003e. It has male threads on one side and female threads on the other, serving as a direct, straight-through extension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack multiple Player One 20mm adapters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, you can thread multiple adapters together to create longer extensions (e.g., two for 40mm). However, for longer distances, using a single, longer extension tube is generally recommended to maximize rigidity and minimize potential flexure in the imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Player One adapter threaded for 1.25\" or 2\" filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is a spacing adapter only. It does not have internal threads for mounting filters. Filters must be placed elsewhere in the optical train, such as in a filter wheel or a dedicated filter drawer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between an M42 adapter and a T2 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThere is no difference in this context. The terms \u003cstrong\u003eM42\u003c\/strong\u003e, \u003cstrong\u003eT-thread\u003c\/strong\u003e, and \u003cstrong\u003eT2-thread\u003c\/strong\u003e all refer to the same \u003cstrong\u003eM42x0.75mm\u003c\/strong\u003e thread specification, which is the de facto standard for astrophotography equipment. This adapter is compatible with all of them.\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\u003eExtension Length\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T2-thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T2-thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlayer One M42F-M42M Adapter - 20mm\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\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002528858397,"sku":"POA-M42F-M42M-20","price":34.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M42F-M42M-20-1.jpg?v=1772678576"},{"product_id":"player-one-m48f-m42m-adapter-17-5mm","title":"Player One M48F-M42M Adapter - 17.5mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds a precise 17.5mm of optical path length\u003c\/li\u003e\n\u003cli\u003eConverts female M48x0.75 threads to male M42x0.75 T-threads\u003c\/li\u003e\n\u003cli\u003eConnects M48 accessories like flatteners to M42 cameras and T-rings\u003c\/li\u003e\n\u003cli\u003eMachined from aluminum with a non-reflective black anodized finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003ePlayer One M48F-M42M Adapter - 17.5mm\u003c\/h2\u003e\n      \u003cp\u003eAchieving correct back focus between M48-threaded flatteners and M42-threaded cameras requires precise spacing, and the Player One M48F-M42M adapter adds exactly 17.5mm of optical length to bridge this common gap. This single, rigid component simplifies your imaging train by both converting thread standards and extending the optical path, eliminating the need to stack multiple, less stable adapters.\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\u003eAchieving 17.5mm Back Focus with M48 to M42 Conversion\u003c\/h3\u003e\n      \u003cp\u003eIn astrophotography, every millimeter of spacing counts. This adapter is purpose-built to provide a fixed 17.5mm extension, a common requirement for achieving the critical 55mm back focus distance when using various cameras and filter wheels. Its dual-function design solves two problems at once.\u003c\/p\u003e\n      \u003cp\u003eThe adapter features a female M48x0.75 (2-inch filter) thread on the telescope side, allowing it to connect directly to most field flatteners, reducers, and off-axis guiders. The camera side has a male M42x0.75 T-thread, the universal standard for connecting to DSLR T-rings and dedicated astronomy cameras.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePrecise Spacing:\u003c\/strong\u003e Adds exactly 17.5mm to your back focus calculation, a non-standard length that can be difficult to achieve with other spacers.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSecure Connection:\u003c\/strong\u003e Machined as a single piece, it prevents flexure and tilt that can occur when stacking multiple smaller adapters.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStandardized Threads:\u003c\/strong\u003e Uses the industry-standard M48 and M42 threads with a 0.75mm pitch for broad compatibility across brands.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eInternal Baffling:\u003c\/strong\u003e A matte black interior finish minimizes internal reflections to maintain image contrast.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for the Player One M48F-M42M 17.5mm adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter is designed to add exactly \u003cstrong\u003e17.5mm of spacing\u003c\/strong\u003e in an astrophotography imaging train while simultaneously adapting the larger \u003cstrong\u003eM48 (2-inch filter) thread\u003c\/strong\u003e to the smaller \u003cstrong\u003eM42 T-thread\u003c\/strong\u003e. It's a specialized component for hitting a precise back focus target.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI have a flattener with an M48 thread that requires 55mm of back focus, and my camera has an M42 thread and 12.5mm of flange distance. Will this Player One 17.5mm adapter work?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. In your scenario, you need 55mm - 12.5mm = 42.5mm of total spacing. The 17.5mm adapter by itself is not long enough. This adapter is for imaging trains where 17.5mm is the specific gap required to reach the target back focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Player One 17.5mm adapter to connect my ZWO filter wheel (M48) to my Canon DSLR with an M42 T-ring for imaging the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this is a very common application. This adapter provides the physical thread conversion between the M48 filter wheel and the M42 T-ring. You must ensure that the total optical path length of your filter wheel, T-ring, and this 17.5mm adapter adds up to the correct back focus distance specified by 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\"\u003eWhat do \"M48F\" and \"M42M\" mean on the Player One adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eM48F\u003c\/strong\u003e stands for a \u003cstrong\u003efemale M48x0.75 thread\u003c\/strong\u003e, which receives a male M48 accessory. \u003cstrong\u003eM42M\u003c\/strong\u003e stands for a \u003cstrong\u003emale M42x0.75 thread\u003c\/strong\u003e, which threads into a female M42 T-ring or camera body.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the thread pitch on this Player One adapter the standard 0.75mm?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, both the M48 and M42 threads use the standard astronomical pitch of 0.75mm. This ensures full compatibility with equipment from nearly all major astrophotography brands.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Player One M48F-M42M adapter have internal threads for filters?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This component is a dedicated thread adapter and spacer. It does not have internal threads to mount a filter. Filters must be placed elsewhere in the optical train, such as in a filter drawer or filter wheel.\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eThread Adapter \/ Extension Tube\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e17.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTelescope Side Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCamera Side Thread\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack Anodized\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\"\u003ePlayer One M48F-M42M Adapter - 17.5mm\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002554253597,"sku":"POA-M48F-M42M-17.5","price":34.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M48F-M42M-17.5-1.jpg?v=1772678813"},{"product_id":"player-one-m48m-m48m-gender-changer-adapter-2mm","title":"Player One M48M-M48M Gender Changer Adapter - 2mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects two female M48 threaded accessories\u003c\/li\u003e\n\u003cli\u003eProvides M48x0.75mm male threads on both sides\u003c\/li\u003e\n\u003cli\u003eAdds a precise 2mm of optical path length\u003c\/li\u003e\n\u003cli\u003eIdeal for fine-tuning back focus in an imaging train\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M48M-M48M Gender Changer Adapter - 2mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M48M-M48M Gender Changer Adapter connects two female M48 (48mm x 0.75mm) threaded accessories while adding a minimal 2mm of optical path length. This ultra-thin adapter is essential for achieving precise back focus when your imaging train components both terminate in female M48 threads.\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 2mm Spacing with M48 Male-to-Male Threads\u003c\/h3\u003e\n\u003cp\u003eThis adapter solves a common problem in astrophotography: connecting two accessories that both feature female M48x0.75mm threads. By providing two male M48 threads, it allows you to directly couple components like flatteners, reducers, and filter wheels. Its key feature is the minimal 2mm thickness, making it an ideal \"fine-tuning\" spacer for hitting critical back focus distances without introducing significant length to your imaging train.\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 Player One M48M-M48M Gender Changer Adapter used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Player One M48M-M48M adapter is used to connect two pieces of equipment that both have \u003cstrong\u003efemale M48x0.75mm threads\u003c\/strong\u003e, such as joining a specific filter wheel directly to a field flattener. It serves as a male-to-male bridge and adds exactly \u003cstrong\u003e2mm of spacing\u003c\/strong\u003e to the optical path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy flattener requires 55mm of back focus, but my setup is at 53mm. Will this Player One M48 adapter work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is the perfect application for this adapter. If your final component has a female M48 thread, this \u003cstrong\u003e2mm adapter\u003c\/strong\u003e provides the precise spacing needed to extend your current 53mm distance to the target 55mm back focus required by your flattener.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Player One M48 adapter to connect my telescope's M48 port to a camera with M42 T-threads?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter is not a thread converter. It has M48 male threads on both sides. To connect an M48 component to an M42 component, you would need a dedicated M48-to-M42 step-down adapter, not this M48M-M48M gender changer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"M48M-M48M\" mean for this Player One adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \"M48M-M48M\" designation indicates that the adapter has an \u003cstrong\u003eM48 Male thread on both sides\u003c\/strong\u003e. It's a \"male-to-male\" gender changer, specifically designed to join two female M48 ports together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this M48 adapter the same as a 2-inch filter thread?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003eM48x0.75mm thread pitch\u003c\/strong\u003e is the standard for 2-inch astronomy filters. This adapter can be used in any optical train that utilizes this common M48 thread standard for components like filter drawers, off-axis guiders, and flatteners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill adding the Player One 2mm adapter cause any vignetting?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor its intended purpose of joining two M48 components, it should not introduce any additional vignetting, as it maintains the standard 48mm clear aperture. However, the effect of any component on vignetting depends on the entire optical train and the size of your camera's sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eGender Changer (Male-to-Male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type (Side 1)\u003c\/td\u003e\n\u003ctd\u003eM48x0.75mm Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Type (Side 2)\u003c\/td\u003e\n\u003ctd\u003eM48x0.75mm Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Path Length\u003c\/td\u003e\n\u003ctd\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002561003805,"sku":"POA-M48M-M48M-2","price":25.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M48M-M48M-2.jpg?v=1772679070"},{"product_id":"player-one-m48m-m42m-adapter-2mm","title":"Player One M48M-M42M Adapter - 2mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts M48x0.75mm Female Threads to M42x0.75mm Female Threads\u003c\/li\u003e\n\u003cli\u003eProvides 2mm of Optical Path Length\u003c\/li\u003e\n\u003cli\u003eMale Threads on Both Sides (M48M-M42M)\u003c\/li\u003e\n\u003cli\u003eStandard 0.75mm Thread Pitch\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Aluminum 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\u003ePlayer One M48M-M42M Adapter - 2mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M48M-M42M Adapter connects M48 (2-inch filter) female-threaded accessories to M42 (T-thread) female-threaded components. This male-to-male adapter adds precisely 2mm of optical path length, which is critical for achieving correct back focus in complex imaging trains. Both the M48 and M42 threads feature a standard 0.75mm pitch for broad compatibility with most astronomy gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision 2mm Spacing for Critical Back Focus\u003c\/h3\u003e\n\u003cp\u003eThis adapter is more than a simple thread converter; it's a precision spacing tool. The fixed 2mm thickness allows you to make fine adjustments to your back focus distance, helping to ensure your flattener or reducer is at the optimal distance from the sensor for sharp stars across the entire frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eConnect M48 and M42 Female-Threaded Accessories\u003c\/h3\u003e\n\u003cp\u003eEngineered with male M48x0.75mm threads on one side and male M42x0.75mm threads on the other, this adapter joins two components that both have female threads. This configuration is often required when connecting a larger format filter wheel (with an M48 female input) to a camera or off-axis guider that has a female M42 T-thread input.\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 use for the Player One M48M-M42M Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt connects two accessories that both have female threads—specifically, an \u003cstrong\u003eM48x0.75mm\u003c\/strong\u003e female port and an \u003cstrong\u003eM42x0.75mm\u003c\/strong\u003e female T-thread port. It also serves as a spacer, adding a precise \u003cstrong\u003e2mm\u003c\/strong\u003e of length to your optical train to help achieve correct back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 2mm thickness of this Player One adapter affect my imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e2mm thickness\u003c\/strong\u003e adds directly to your total back focus distance. This is useful when you are slightly short of the required spacing for a field flattener or reducer. However, you must account for this extra 2mm in your calculations, as it could prevent you from reaching focus if your train is already near its maximum length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this M48M-M42M adapter to connect my M48 filter wheel to an M42 T-ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt depends on the specific threads of your components. This adapter is designed for \u003cstrong\u003efemale-to-female\u003c\/strong\u003e connections. If your filter wheel has a female M48 thread and your T-ring (or camera) has a female M42 thread, this adapter will join them correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the exact thread specifications for the Player One adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter has \u003cstrong\u003emale M48x0.75mm threads\u003c\/strong\u003e on one side and \u003cstrong\u003emale M42x0.75mm threads\u003c\/strong\u003e on the other side. The \"M\" in the product name (M48M-M42M) designates male threads on both ends.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Player One adapter compatible with accessories from other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. M48x0.75mm (often called 2\" filter thread) and M42x0.75mm (the standard T-thread) are industry standards for astrophotography. This adapter should be compatible with any equipment from any brand that uses these standard female threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I need an adapter with male threads on both sides?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA male-to-male adapter, sometimes called a \"gender changer,\" is necessary when you need to connect two components that both have female threads. For example, some focal reducers have a female M48 thread on the camera side, and many astronomy cameras have a female M42 T-thread. This adapter bridges that specific connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002572931357,"sku":"POA-M48M-M42M-2","price":25.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M48M-M42M-2.jpg?v=1772679456"},{"product_id":"player-one-m42f-m48m-adapter-mm","title":"Player One M42F-M48M Adapter - 0mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts M48x0.75 male threads to M42x0.75 female threads\u003c\/li\u003e\n\u003cli\u003eAdds 0mm of optical path length, preserving critical back focus\u003c\/li\u003e\n\u003cli\u003eConnects M42 T-thread cameras to M48 (2-inch) flatteners, reducers, or filter wheels\u003c\/li\u003e\n\u003cli\u003eUltra-thin profile for use in tight imaging trains\u003c\/li\u003e\n\u003cli\u003eMachined from black anodized aluminum to minimize internal reflections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M42F-M48M Adapter - 0mm\u003c\/h2\u003e\n\u003cp\u003eThe Player One M42F-M48M Adapter seamlessly bridges the gap between the two most common threaded standards in astrophotography, converting a male M48x0.75 thread to a female M42x0.75 T-thread. Critically, this adapter adds exactly 0mm of optical path length, allowing you to connect different components without consuming any of your system's calculated back focus.\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 0mm Solution: Connecting M42 and M48 Gear Without Consuming Back Focus\u003c\/h3\u003e\n\u003cp\u003eModern correctors, reducers, and filter wheels often use the larger M48 (2-inch filter) thread to prevent vignetting with larger sensors. However, the vast majority of dedicated astronomy cameras and DSLR T-rings still rely on the M42 T-thread. This adapter provides the essential mechanical link between these two standards.\u003c\/p\u003e\n\u003cp\u003eIn a precisely calculated imaging train, every millimeter of back focus is critical. Standard adapters can add several millimeters of length, which can prevent you from reaching perfect focus or placing the sensor at the corrector's optimal focal plane. By adding 0mm of length, the Player One M42F-M48M adapter ensures your back focus measurements remain completely unchanged, preserving the optical integrity of your setup.\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 Player One M42F-M48M Adapter primarily used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is used to connect an accessory with M42 female threads (like a camera or T-ring) to a component with M48 female threads (like a field flattener, coma corrector, or filter wheel). It effectively changes the male thread on your corrector from M48 to M42 without adding any length to the optical path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Player One M42F-M48M adapter cause vignetting with my full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePotentially, yes. Because you are stepping down from a wider M48 opening to a narrower M42 T-thread throat, some vignetting (darkening of the corners) can occur, especially with fast optical systems and full-frame (24x36mm) sensors. This is a physical limitation of the M42 thread standard, not the adapter itself. For APS-C and smaller sensors, it is typically not an issue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 0mm length of the Player One adapter help my imaging setup with an SCT and reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSCT reducers have a very specific back focus distance (e.g., 105mm or 55mm) that must be maintained for proper correction. Using a standard adapter that adds 5mm of length would mean you have to shorten other spacers by 5mm. The Player One \u003cstrong\u003e0mm adapter\u003c\/strong\u003e simplifies this by letting you connect your M42 camera directly without needing to alter your existing spacing calculations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the thread pitch on the Player One M42F-M48M adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBoth the male M48 thread and the female M42 thread use the standard astronomical pitch of \u003cstrong\u003e0.75mm\u003c\/strong\u003e (M48x0.75 and M42x0.75). This ensures compatibility with nearly all astronomical T-threads and 2-inch filter threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter to attach a 2\" filter to my M42 camera nosepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter is not designed to hold filters. It is a thread changer for connecting two primary components in an imaging train. To attach a 2\" filter to an M42 accessory, you would typically need an adapter with female M48 threads on one side and male M42 threads on the other, or a dedicated filter holder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Player One M42F-M48M adapter made of metal or plastic?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter is precision-machined from a lightweight and durable aluminum alloy. It features a black anodized finish to minimize stray light and internal reflections within your imaging train, which helps maintain high contrast.\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\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eM42 Female to M48 Male Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM42x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Length\u003c\/td\u003e\n\u003ctd\u003e0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlayer One M42F-M48M Adapter - 0mm\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\u003cp\u003eThis product does not require software or have a dedicated manual.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":51002576863517,"sku":"POA-M42F-M48M-0","price":17.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/POA-M42F-M48M-0-1.jpg?v=1772679677"},{"product_id":"player-one-1-25-2-rotolock-adapter","title":"Player One Rotolock Adapter - 2\"-1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts 2\" focusers and diagonals to hold 1.25\" accessories\u003c\/li\u003e\n\u003cli\u003eRotolock mechanism provides a secure, self-centering grip\u003c\/li\u003e\n\u003cli\u003eEliminates tilt and wobble common with thumbscrew holders\u003c\/li\u003e\n\u003cli\u003eFeatures M48x0.75 female threads for accepting 2\" filters\u003c\/li\u003e\n\u003cli\u003eDesigned for the precise alignment demands of planetary imaging\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\u003e1.25-2 ROTOLOCK Adapter\u003c\/h2\u003e\n      \u003cp\u003eThe 1.25-2 Rotolock is a precision adapter that converts any 2\" focuser or diagonal to accept 1.25\" accessories, providing a perfectly centered and secure hold every time. It uses standard M48x0.75 female threads to attach to your optical train, ensuring broad compatibility while eliminating the common frustrations of thumbscrew-based holders.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe 1.25\" to 2\" Rotolock: Self-Centering Grip for Imaging\u003c\/h3\u003e\n      \u003cp\u003eDesigned specifically for planetary imaging, the Rotolock system ensures your camera sensor remains perfectly parallel to the focal plane. A simple clockwise twist of the knurled ring engages a collar that applies uniform pressure around the entire 1.25\" barrel of your accessory. This self-centering action is critical for high-magnification work, where even the slightest tilt can degrade image sharpness.\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\u003eRotolock vs. Thumbscrew Adapters: Eliminating Optical Tilt\u003c\/h3\u003e\n      \u003cp\u003eTraditional adapters rely on one or two thumbscrews, which push the accessory barrel against the opposite side of the holder. This single point of contact often induces tilt and can mar the finish of your eyepieces and cameras. The Rotolock's 360-degree grip distributes the clamping force evenly, creating a solid, flex-free connection that maintains optical alignment even with heavier cameras.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 1.25-2 Rotolock improve planetary imaging on a Schmidt-Cassegrain?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eOn an SCT, maintaining perfect alignment is crucial for resolving fine details on planets like Jupiter or Saturn. The \u003cstrong\u003e1.25-2 Rotolock\u003c\/strong\u003e ensures your planetary camera is perfectly centered and square to the optical axis, preventing the image degradation and loss of focus across the sensor that can be caused by tilt from a standard thumbscrew adapter.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the Rotolock mechanism over a standard thumbscrew adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary advantage is its \u003cstrong\u003eself-centering, uniform grip\u003c\/strong\u003e. Thumbscrews create a single pressure point that can tilt the accessory and damage its barrel. The Rotolock provides a secure, 360-degree hold that eliminates tilt, prevents flexure, and won't leave marks on your equipment.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I attach 2\" filters to the 1.25-2 Rotolock?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The 2\" barrel of the Rotolock is threaded with standard \u003cstrong\u003eM48x0.75 female threads\u003c\/strong\u003e, allowing you to attach 2\" filters such as a UV\/IR cut filter directly to the adapter before inserting it into your diagonal or focuser.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eMy 1.25\" camera nosepiece feels tight or won't slide into the Rotolock. What should I do?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eEnsure the Rotolock ring is turned fully counter-clockwise to completely open the inner collar. Some accessories have slightly oversized barrels or burrs that can cause a tight fit. A gentle, straight insertion without wiggling is usually effective. The precise tolerances that ensure a no-tilt fit mean there is very little extra play.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 1.25-2 Rotolock hold a heavy camera without flexing?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, the Rotolock mechanism is designed to provide a much more secure and rigid connection than thumbscrews. The full-circumference grip is excellent at preventing heavier planetary cameras from sagging or flexing within the optical train, which is essential for maintaining focus during an imaging run.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 1.25-2 Rotolock useful for visual observers too?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. While designed for imaging, the secure, self-centering grip is also beneficial for visual use. It ensures your eyepiece is perfectly aligned with the telescope's optics, which can improve edge-of-field sharpness, and it makes swapping between different 1.25\" eyepieces quick and easy.\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\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003e2\" Barrel (M48x0.75 Female Thread) to 1.25\" Holder\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLocking Mechanism\u003c\/td\u003e\n\u003ctd\u003eTwist-to-lock Rotolock\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003ePlanetary Imaging, Visual Observing\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\"\u003e1.25-2 Rotolock Adapter\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913428496669,"sku":"POA-RL125-2","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-1-25-2-ROTOLOCK-1_7ae5cbd1-0227-4edb-bb73-12e23dc3480d.jpg?v=1789090988"},{"product_id":"player-one-1-25-m42-rotolock","title":"Player One Rotolock Adapter - M42-1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConverts M42x0.75 Female Threads to a 1.25\" Holder\u003c\/li\u003e\n\u003cli\u003eRotolock Twist-to-Lock Mechanism\u003c\/li\u003e\n\u003cli\u003eSelf-Centering Design Eliminates Optical Tilt\u003c\/li\u003e\n\u003cli\u003ePrevents Scratches and Marring on Accessory Barrels\u003c\/li\u003e\n\u003cli\u003eIdeal for Planetary Imaging Cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\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\u003e1.25-M42 Rotolock\u003c\/h2\u003e\n\u003cp\u003eThe 1.25-M42 Rotolock converts a standard M42x0.75 female thread to a self-centering 1.25\" holder for cameras and eyepieces. A single clockwise twist engages the lock, providing a perfectly centered and secure hold across the entire 1.25\" barrel without the tilt or marring caused by thumbscrews.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eM42 to 1.25\" Rotolock: Perfect Centering Without Thumbscrews\u003c\/h3\u003e\n\u003cp\u003eFor planetary imaging, perfect alignment of the camera sensor to the optical axis is non-negotiable. Traditional thumbscrew adapters introduce tilt by applying uneven pressure, which can soften fine details. The Rotolock solves this by using an internal compression ring that grips the entire circumference of your accessory for a perfectly square, secure connection every time.\u003c\/p\u003e\n\u003cp\u003eOperation is simple and intuitive: rotate the knurled ring clockwise to lock your camera or eyepiece, and rotate it counter-clockwise to release. This design not only provides superior alignment but also prevents the screws from scratching or denting the barrels of your valuable equipment.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerfect Centering:\u003c\/strong\u003e The internal locking ring applies uniform pressure, ensuring your camera sensor remains perfectly aligned with the optical axis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Hold:\u003c\/strong\u003e Eliminates the risk of accessories slipping or wobbling, which is critical during long imaging sessions or when using heavier cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Marring:\u003c\/strong\u003e Unlike thumbscrews that dig into your eyepiece and camera barrels, the Rotolock's smooth action preserves the finish of your equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 1.25-M42 Rotolock improve planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePlanetary imaging relies on perfect optical alignment to achieve maximum sharpness. The Rotolock ensures your camera sensor is perfectly centered and parallel to the focal plane, eliminating the subtle tilt introduced by thumbscrews that can soften fine details on Jupiter's cloud bands or Saturn's rings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 1.25-M42 Rotolock more secure than a standard thumbscrew adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. A thumbscrew applies pressure at one or two points, whereas the Rotolock distributes clamping force around the entire 360-degree circumference of the accessory barrel. This creates a more uniform and secure grip that prevents any wobble or slippage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat equipment can I connect the 1.25-M42 Rotolock to?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter features a standard \u003cstrong\u003eM42x0.75 female thread\u003c\/strong\u003e (also known as a T-thread). It can be attached to many focusers, filter wheels, off-axis guiders, or other accessories that have a male M42 T-thread output. The output side accepts any standard 1.25\" accessory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 1.25-M42 Rotolock scratch my eyepieces or camera nosepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. One of the primary advantages of the Rotolock design is that it doesn't use set screws. The internal compression ring provides a firm grip without digging into or marring the polished surface of your accessory barrels, preserving their condition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy can’t I slide my 1.25\" camera nosepiece all the way into the Rotolock?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Rotolock mechanism uses an internal compression ring. For an accessory to slide in, the ring must be fully open. Rotate the outer grip \u003cstrong\u003ecounter-clockwise\u003c\/strong\u003e until it stops to ensure the adapter is ready to accept a 1.25\" barrel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs there a specific orientation needed to insert an accessory into the 1.25-M42 Rotolock?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Since the locking mechanism is circular and self-centering, you can insert your 1.25\" camera or eyepiece at any rotational angle. This makes setup faster and easier, as you don't need to align a barrel's undercut with a thumbscrew.\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\u003eTelescope Side Connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 Female Thread (T-Thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Side Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" Holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocking Mechanism\u003c\/td\u003e\n\u003ctd\u003eRotolock Twist-Lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentering\u003c\/td\u003e\n\u003ctd\u003eSelf-Centering\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\"\u003e1.25-M42 Rotolock Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913428791581,"sku":"POA-RL125-M42","price":55.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-1-25-M42-ROTOLOCK-1_7817363c-abf9-4ab4-9a50-0b2e72b20449.jpg?v=1789090995"},{"product_id":"player-one-cs-m42-adapter","title":"Player One CS-M42 Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects CS-Mount Female Threads to M42 Male Threads\u003c\/li\u003e\n\u003cli\u003eAdapts Small-Format Cameras to Standard T2 Accessories\u003c\/li\u003e\n\u003cli\u003eEnables Use of Filter Wheels and Focal Reducers\u003c\/li\u003e\n\u003cli\u003eLow-Profile Design for Minimal Back-Focus Consumption\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\u003eCS-M42 Adapter\u003c\/h2\u003e\n\u003cp\u003eThis CS-M42 adapter provides the essential connection between cameras using the CS-mount female thread and the vast ecosystem of astronomical accessories built around the M42x0.75mm T2 male thread. It allows you to integrate small-format guide or planetary cameras into a standard imaging train, opening up compatibility with filter wheels, off-axis guiders, and focal reducers.\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\u003eBridge Your CS-Mount Camera to the T2-Thread Standard\u003c\/h3\u003e\n\u003cp\u003eMany specialized, high-frame-rate cameras, particularly those adapted from industrial or security applications, use the compact CS-mount standard. This adapter physically converts that female CS-thread into a male M42 (T2) thread, the universal standard for connecting imaging components in amateur astronomy.\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\u003eIntegrate Filter Wheels, Reducers, and More\u003c\/h3\u003e\n\u003cp\u003eBy making your camera T2-compatible, this adapter unlocks critical imaging capabilities. You can now place a filter wheel directly in front of your camera for monochrome imaging or attach it to a focal reducer or coma corrector that terminates in standard M42 threads, allowing for wider fields of view and faster imaging systems.\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 function of the CS-M42 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary function of the \u003cstrong\u003eCS-M42 adapter\u003c\/strong\u003e is to convert the female CS-thread on a camera body to a male M42x0.75mm thread, commonly known as a T2-thread. This allows you to attach your CS-mount camera to standard astronomy accessories like filter wheels, off-axis guiders, and reducers that use the T2 standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this CS-M42 adapter with a C-mount camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter is specifically for CS-mount threads. While C-mount and CS-mount have the same thread diameter and pitch, they have different flange-to-sensor distances (17.526mm for C-mount, 12.526mm for CS-mount). Using this adapter with a C-mount camera would likely prevent you from reaching focus without additional spacers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the CS-M42 adapter help with planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor planetary imaging, this adapter allows you to connect your CS-mount camera to accessories like an atmospheric dispersion corrector (ADC) or a filter wheel with LRGB or IR-pass filters. These components almost universally use T2-threads, making the CS-M42 adapter essential for building a planetary imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the CS-M42 adapter allow me to attach my camera to a telescope focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIndirectly, yes. The adapter provides a male T2-thread. From there, you would typically add a T2-to-1.25\" or T2-to-2\" nosepiece to insert the camera assembly into your telescope's focuser. This adapter is the first step in making that connection possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this adapter add significant length to the optical path?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile any adapter adds some length, adapters like the CS-M42 are designed to be as \"thin\" or low-profile as possible to consume minimal back-focus. This is critical for systems with limited back-focus, such as when using a focal reducer or an off-axis guider.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat types of cameras typically use a CS-mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCS-mounts are common on small-format, high-speed cameras often used for autoguiding, planetary imaging, or all-sky cameras. These are frequently based on industrial or security sensors and require an adapter like the CS-M42 to be used with standard astronomical equipment.\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\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eCS-Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM42x0.75mm (T2-Thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\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\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913432264989,"sku":"POA-CSM42","price":17.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-CS-M42-adapter-1_2abaea9c-1407-4ed2-bfb1-2c498900476d.jpg?v=1789091120"},{"product_id":"player-one-t2-t2-adapter","title":"Player One T2-T2 Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eM42 x 0.75 Male Threads (Both Sides)\u003c\/li\u003e\n\u003cli\u003eDesigned for Player One Phoenix Filter Wheels\u003c\/li\u003e\n\u003cli\u003eAdds Minimal Optical Path Length\u003c\/li\u003e\n\u003cli\u003eSecure, All-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\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\u003eT2-T2 Adapter\u003c\/h2\u003e\n      \u003cp\u003eThis T2-T2 adapter provides a secure, all-metal connection for your imaging train, featuring standard M42 x 0.75 male threads on both sides to link specific accessories with the correct spacing.\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\u003eM42 x 0.75 Threads: Connecting Phoenix Wheels to Your Imaging Train\u003c\/h3\u003e\n      \u003cp\u003eSpecifically designed for use with the Player One Phoenix Filter Wheel, this adapter serves as the critical link between the wheel and your camera. It can also be used to attach the wheel to a 1.25-inch to M42 rotolock, ensuring correct and rigid alignment in your optical path.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMale-to-Male T2 Threads:\u003c\/strong\u003e Features M42 x 0.75 male threads on both faces for direct coupling of female T2-threaded components.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePhoenix Wheel Integration:\u003c\/strong\u003e Purpose-built to provide the necessary connection for Player One's Phoenix filter wheel series.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMinimal Extension:\u003c\/strong\u003e Adds a small, fixed amount of optical path length to your imaging train, which must be factored into back focus calculations.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\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 T2-T2 adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter is designed to connect a \u003cstrong\u003ePlayer One Phoenix Filter Wheel\u003c\/strong\u003e to another accessory with female M42 x 0.75 (T2) threads, such as a camera or a 1.25-inch to M42 rotolock.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use this T2-T2 adapter to connect my Phoenix wheel to my astronomy camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou would thread one male side of the adapter into the female T2 port on the Phoenix wheel, and the other male side into the female T2 port on the front of your camera. This creates a direct, threaded connection between the two components, ensuring they are held rigidly and in alignment.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eAre the threads on this T2-T2 adapter compatible with standard T-rings?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The \u003cstrong\u003eM42 x 0.75 threads\u003c\/strong\u003e are the standard \"T2\" or \"T-thread\" specification used throughout the astronomy industry. It will connect to any standard female T-thread port found on T-rings, cameras, and other accessories.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this T2-T2 adapter work with filter wheels from other brands?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile it uses a standard M42 x 0.75 thread, this adapter is specifically intended for use with the \u003cstrong\u003ePlayer One Phoenix wheel\u003c\/strong\u003e. Compatibility with other brands depends on whether they require a male-to-male adapter for connection; always check your specific wheel's connection requirements and spacing needs.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this T2-T2 adapter change the back focus distance?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, any adapter adds to the optical path length. This T2-T2 adapter adds a small, fixed amount of length to your imaging train, which must be accounted for when calculating your total back focus distance.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this T2-T2 adapter made of?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt is constructed from \u003cstrong\u003eblack-anodized aluminum\u003c\/strong\u003e to ensure a rigid, non-reflective connection within your optical train, preventing stray light from affecting your images.\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    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913432723741,"sku":"POA-T2T2","price":17.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-T2-T2-adapter-1_e6c25523-94bf-4584-8049-ace45bed7c39.jpg?v=1789091136"},{"product_id":"player-one-1-25-inch-extender","title":"Player One 1.25\" Extender","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds critical focus travel for guide cameras\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" barrel diameter\u003c\/li\u003e\n\u003cli\u003eMale M28.5 x 0.6 filter threads\u003c\/li\u003e\n\u003cli\u003eFemale M28.5 x 0.6 filter threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One 1.25\" Extender\u003c\/h2\u003e\n\u003cp\u003eThe Player One 1.25\" Extender is a simple, essential tool for achieving focus with guide cameras that have limited back-focus, featuring standard M28.5 x 0.6 male and female threads for direct compatibility with 1.25\" filters and nosepieces. This component provides the extra outward travel required when your guide camera cannot reach the focal plane of an off-axis guider or guidescope.\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\u003eSolving Focus Travel for Guide Cameras with M28.5 Threads\u003c\/h3\u003e\n\u003cp\u003eMany imaging setups, particularly those using off-axis guiders (OAGs), place the guide camera at a fixed distance from the pick-off prism. If your guide camera's sensor is recessed too deeply, you may run out of focuser travel. This extender inserts between your camera's 1.25\" nosepiece and the focuser, adding the physical length needed to push the camera outward and bring guide stars to a sharp focus.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Threading:\u003c\/strong\u003e With M28.5 x 0.6 female threads on one end and male threads on the other, it installs seamlessly into any standard 1.25\" accessory train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuider-Focused Design:\u003c\/strong\u003e Specifically intended for the low-profile bodies of modern CMOS guide cameras, this extender addresses a common point of failure in autoguiding setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and Lightweight:\u003c\/strong\u003e Adds minimal weight and length to your imaging train, preserving the balance of your telescope mount.\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 use for the Player One 1.25\" Extender?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts main purpose is to add physical length to your optical train to help a guide camera reach focus. This is most often needed when using an \u003cstrong\u003eoff-axis guider (OAG)\u003c\/strong\u003e or a separate guidescope where the guide camera cannot be positioned far enough back to achieve a sharp image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat threads does the Player One 1.25\" Extender use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe extender uses standard 1.25\" filter threads. It has \u003cstrong\u003eM28.5 x 0.6 female threads\u003c\/strong\u003e on one end and \u003cstrong\u003eM28.5 x 0.6 male threads\u003c\/strong\u003e on the other, allowing it to screw directly onto 1.25\" nosepieces, filters, or other compatible accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 1.25\" Extender help me focus my guide camera in a Celestron OAG on an EdgeHD 800?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a perfect scenario for this extender. If you have adjusted the helical focuser on your Celestron OAG to its limit and still can't get sharp guide stars, adding this extender will provide the extra outbound travel needed to bring the guide camera's sensor to the focal point of the pick-off prism.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Player One 1.25\" Extender with a planetary camera in my 10\" f\/4 Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for guiding, you can use it with any 1.25\" camera if you need more out-focus travel. However, in a fast Newtonian, you typically need more *in-focus* travel, not out-focus. This extender would likely move your planetary camera even further from the focal plane, making it less likely to reach focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I thread a 1.25\" filter onto the Player One Extender?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The M28.5 x 0.6 threads are the standard for 1.25\" filters. You can thread a filter onto the male end of the extender or into the female end, depending on your desired configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I stack multiple Player One 1.25\" Extenders for more length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the male and female threads allow you to stack multiple extenders if you need significant additional spacing. However, be mindful that creating a long, unsupported chain of accessories can introduce flexure into your imaging train.\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\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product consists of a single component. No additional items are included in the box.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Player_One_2026_Product_Catalog_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913433084189,"sku":"POA-125EXT","price":17.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-1-25-EXTENDER-1_28f6577a-bf94-4b99-bff3-3f69c6573cb2.jpg?v=1789091143"},{"product_id":"player-one-m54m-m42m-2mm-adapter","title":"Player One M54M-M42M Adapter - 2mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Player One Filter Drawer MAX to Ares \u0026amp; Uranus Cameras\u003c\/li\u003e\n\u003cli\u003eProvides 2mm of Optical Path Length\u003c\/li\u003e\n\u003cli\u003eThread Type 1: M54x0.75 Male\u003c\/li\u003e\n\u003cli\u003eThread Type 2: M42x0.75 Male\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePlayer One M54M-M42M 2MM Adapter\u003c\/h2\u003e\n\u003cp\u003eThe Player One M54M-M42M 2MM Adapter provides a critical 2mm of optical spacing, converting an M54x0.75 male thread to an M42x0.75 male thread. This adapter is specifically engineered to connect the Player One Filter Drawer MAX to the Ares and Uranus series of cooled cameras, ensuring precise back focus and a secure, threaded connection throughout your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision 2mm Spacing for Player One Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eThis adapter supplies exactly 2mm of spacing, a crucial measurement for achieving the standard 55mm back focus distance required by most flatteners and reducers. When used with the Player One Filter Drawer MAX, this adapter completes the optical train, placing your camera's sensor at the optimal focal plane for sharp, coma-free 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\u003eM54 to M42 Threads for Filter Drawers and Cooled Cameras\u003c\/h3\u003e\n\u003cp\u003eFeaturing an M54x0.75 male thread on one side and a standard M42x0.75 T-thread (male) on the other, this component ensures seamless integration. It is designed to connect directly between the M54 female port on the Filter Drawer MAX and the M42 female threads found on Player One's Ares, Uranus, and other planetary cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Player One M54M-M42M 2MM Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the M54M-M42M 2MM Adapter is to securely connect a Player One Filter Drawer MAX to a Player One Ares or Uranus cooled camera. It serves two functions: adapting the M54 thread to an M42 thread and providing a precise 2mm of spacing to achieve correct back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich Player One cameras is the M54M-M42M 2MM Adapter designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is specifically designed for Player One cameras that use a standard M42x0.75 female thread for connection. This includes the \u003cstrong\u003eAres series\u003c\/strong\u003e and \u003cstrong\u003eUranus series\u003c\/strong\u003e of cooled astronomy cameras, as well as many of their planetary cameras.\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 M54M-M42M 2MM Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter has two male threads:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide 1:\u003c\/strong\u003e M54x0.75 Male Thread\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide 2:\u003c\/strong\u003e M42x0.75 Male Thread (Standard T-thread)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 2mm thickness of this adapter important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 2mm thickness is a critical part of the back focus calculation. When building an imaging train with a filter drawer and a camera, every component's thickness must be accounted for to reach the 55mm standard required by most field flatteners and focal reducers. This adapter provides the final, precise 2mm needed in the Player One ecosystem.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the M54M-M42M adapter to connect my Uranus-C camera to the Filter Drawer MAX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would thread the M54 male side of the adapter into the female M54 port on the camera-side of the Filter Drawer MAX. Then, you would thread the M42 male side of the adapter into the female M42 T-threads on the front of your Uranus-C camera body. This creates a solid, light-tight connection with the correct spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this M54M-M42M 2MM adapter work with non-Player One equipment, like a ZWO camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003ePotentially, but compatibility is not guaranteed. The adapter uses industry-standard M54x0.75 and M42x0.75 threads. If your non-Player One filter wheel and ZWO camera have the corresponding female threads and your back focus calculation requires exactly 2mm of additional spacing, it may work. However, it is designed and tested for the Player One ecosystem.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913433313565,"sku":"POA-M54M-M42M-2","price":27.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-M54M-M42M-2MM-Adapter-1_c8e98d0d-8113-4c34-b1fc-bc17ad16e5c0.jpg?v=1789091151"},{"product_id":"player-one-m54m-m48m-2mm-adapter","title":"Player One M54M-M48M Adapter - 2mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConverts M54x0.75 Male Threads to M48x0.75 Male Threads\u003c\/li\u003e\n\u003cli\u003eAdds a Fixed 2mm of Optical Path Length\u003c\/li\u003e\n\u003cli\u003eMale-to-Male Design for Connecting Female-Threaded Components\u003c\/li\u003e\n\u003cli\u003eStandard 0.75mm Astronomical Thread Pitch\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish to Minimize Reflections\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\u003eM54M-M48M 2MM Adapter\u003c\/h2\u003e\n\u003cp\u003eThe M54M-M48M 2MM Adapter is a specialized component designed to solve a common connection and spacing problem in complex imaging trains. It converts a male M54x0.75 thread to a male M48x0.75 thread while adding exactly 2mm of optical path length, allowing you to achieve precise back focus with components that would otherwise be incompatible.\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 2mm Spacing for M54 to M48 Conversion\u003c\/h3\u003e\n\u003cp\u003eThis adapter is engineered for a specific scenario: connecting two components that both feature female threads, such as an M54 threaded focuser or flattener to an M48 threaded filter wheel or camera assembly. By providing male threads on both sides, it bridges the gap securely. Its most critical function is adding a non-negotiable 2mm of spacing, making it an essential tool for hitting the exact back focus distance required by your field flattener or reducer.\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 use for the M54M-M48M 2MM Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary use for the M54M-M48M 2MM Adapter is to connect a component with a female M54 thread to another component with a female M48 thread. It simultaneously adds a fixed \u003cstrong\u003e2mm of optical path length\u003c\/strong\u003e, which is critical for achieving the precise back focus required by many optical correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy flattener has an M54 female output and needs 55mm of back focus. My camera with filter wheel has an M48 female input and sits at 53mm. Will this adapter work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is the perfect application for this adapter. It will bridge the M54 and M48 female threads and add the exact \u003cstrong\u003e2mm of spacing\u003c\/strong\u003e needed to bring your total back focus from 53mm to the required 55mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does 'M54M-M48M' mean in the M54M-M48M 2MM Adapter's name?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe designation \"M54M-M48M\" indicates the adapter's thread configuration:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM54M:\u003c\/strong\u003e Refers to a Male M54x0.75mm thread on one side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48M:\u003c\/strong\u003e Refers to a Male M48x0.75mm thread on the other side.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a focuser with an M54 female thread and need to attach my M48 T-ring. Why use this M54M-M48M 2MM Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard T-ring typically has female M48 threads. If your focuser also has female M54 threads, you need a male-to-male adapter like this one to connect them. A standard step-down ring is usually female-to-male or male-to-female and would not work. This adapter solves that specific connection issue while also providing a fixed 2mm of spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the thread pitch on the M54M-M48M 2MM Adapter standard for astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, both the M54 and M48 threads use the standard \u003cstrong\u003e0.75mm pitch\u003c\/strong\u003e. This is the most common thread pitch for astronomical accessories like field flatteners, reducers, off-axis guiders, and camera T-rings, ensuring wide compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the M54M-M48M 2MM Adapter made of?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is machined from black-anodized aluminum. This construction ensures it is lightweight yet durable, provides a secure threaded connection, and minimizes internal reflections that could reduce the contrast of your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eMale-to-Male Thread Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Thread\u003c\/td\u003e\n\u003ctd\u003eM54x0.75 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Thread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Path Length\u003c\/td\u003e\n\u003ctd\u003e2mm\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\"\u003eM54M-M48M 2MM 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\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913433477405,"sku":"POA-M54M-M48M-2","price":27.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-M54M-M48M-2MM-Adapter-1_88697823-6753-49a9-9270-37fa333dcd9f.jpg?v=1789091158"},{"product_id":"player-one-m54m-m54m-2mm-adapter","title":"Player One Adaptateur M54M-M54M - 2mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAjoute 2mm de chemin optique\u003c\/li\u003e\n\u003cli\u003eRelie deux filetages femelles M54x0.75\u003c\/li\u003e\n\u003cli\u003eFait office d'entretoise et de changeur de genre\u003c\/li\u003e\n\u003cli\u003ePas de filetage standard M54 x 0.75mm\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\u003eCaractéristiques\u003c\/li\u003e\n\u003cli\u003eContenu de la boîte\u003c\/li\u003e\n\u003cli\u003eGarantie\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\u003eAdaptateur M54M-M54M 2MM\u003c\/h2\u003e\n\u003cp\u003eL'adaptateur M54M-M54M 2MM ajoute exactement 2mm de chemin optique et transforme un port M54 femelle en filetage M54 mâle au pas standard de 0.75mm. Cet adaptateur est un élément essentiel pour régler précisément le backfocus et raccorder des accessoires à filetage M54 au sein d'un train optique rigide et sûr.\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\u003eUn espacement précis de 2mm pour les trains optiques M54\u003c\/h3\u003e\n\u003cp\u003eCet adaptateur joue un double rôle essentiel dans toute configuration d'astrophotographie utilisant le standard M54. Il sert à la fois de changeur de genre, permettant de relier deux éléments à filetage M54 femelle, et d'entretoise fixe de 2mm pour affiner votre backfocus. Son profil mince est indispensable lorsqu'il ne vous manque que quelques millimètres pour atteindre la distance idéale entre le capteur et le correcteur.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrection du backfocus :\u003c\/strong\u003e utilisez cet adaptateur pour allonger votre train optique de façon précise et obtenir des étoiles parfaitement ponctuelles sur tout le champ.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssemblage des composants :\u003c\/strong\u003e reliez solidement des accessoires comme les diviseurs optiques (OAG), les roues à filtres et les rotateurs de caméra lorsque les deux côtés à raccorder présentent un filetage femelle M54x0.75.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnexion rigide :\u003c\/strong\u003e usiné d'une seule pièce, il assure une liaison sans flexion entre les composants lourds et préserve l'alignement optique.\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\"\u003eQuelle est l'utilisation principale de l'adaptateur M54M-M54M 2MM ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eL'adaptateur M54M-M54M 2MM sert principalement à relier deux équipements dotés de filetages femelles M54x0.75, tout en ajoutant exactement \u003cstrong\u003e2mm\u003c\/strong\u003e d'espacement au train optique. C'est une solution courante pour affiner le backfocus ou pour assembler certains accessoires comme les roues à filtres et les diviseurs optiques.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eComment cet adaptateur de 2mm m'aide-t-il à régler le backfocus de ma lunette et de mon aplatisseur de champ ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLa plupart des aplatisseurs de champ et des réducteurs de focale exigent un backfocus précis, souvent de 55mm. Si votre caméra et vos adaptateurs actuels vous placent à 53mm, cet adaptateur M54M-M54M 2MM est la solution idéale pour ajouter les 2mm manquants et atteindre la distance optimale, pour des étoiles nettes jusqu'au bord de l'image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003ePuis-je utiliser l'adaptateur M54M-M54M 2MM pour relier une caméra à une roue à filtres ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOui, si la face avant de votre caméra et le côté télescope de votre roue à filtres présentent tous deux un filetage femelle M54x0.75, cet adaptateur permet de les relier. Il agit comme un « changeur de genre » mâle-mâle pour assurer la liaison tout en ajoutant 2mm de longueur.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eQuel est le pas de filetage de l'adaptateur M54M-M54M 2MM ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eL'adaptateur utilise le pas de filetage photographique standard M54, soit \u003cstrong\u003e0.75mm\u003c\/strong\u003e. Il est ainsi compatible avec la grande majorité des caméras astronomiques, roues à filtres et correcteurs qui utilisent le standard M54.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eL'adaptateur M54M-M54M 2MM est-il fileté pour recevoir des filtres ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNon. Cet adaptateur est un élément d'espacement et de changement de genre. Il possède des filetages mâles des deux côtés et ne comporte pas de filetage interne pour recevoir des filtres standard de 2\" (M48).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003ePourquoi choisir un adaptateur fixe de 2mm plutôt qu'une entretoise réglable ?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUn adaptateur fixe tel que le M54M-M54M 2MM offre une liaison plus rigide et sans tilt que la plupart des entretoises réglables. Lorsque vous savez qu'il vous faut exactement 2mm, une entretoise fixe est le moyen le plus sûr d'y parvenir sans risquer de nuire à l'alignement optique.\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\u003eType d'adaptateur\u003c\/td\u003e\n\u003ctd\u003eAdaptateur fileté mâle-mâle \/ entretoise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnexion (côté 1)\u003c\/td\u003e\n\u003ctd\u003eFiletage mâle M54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnexion (côté 2)\u003c\/td\u003e\n\u003ctd\u003eFiletage mâle M54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLongueur optique\u003c\/td\u003e\n\u003ctd\u003e2mm\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\"\u003eAdaptateur M54M-M54M 2MM\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\u003cp\u003e\u003ca title=\"Garantie Player One de 2 ans\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003eGarantie Player One de 2 ans\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913433674013,"sku":"POA-M54M-M54M-2","price":27.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-M54M-M54M-2MM-Adapter-1_0c57e3a9-87e4-4d0e-89f9-ada6f333a48c.jpg?v=1789091166"}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/player-one-adapters.oembed","provider":"David Astro","version":"1.0","type":"link"}