{"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":19.0,"currency_code":"USD","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","url":"https:\/\/davidastro.com\/fr-us\/products\/player-one-m54m-m48m-2mm-adapter","provider":"David Astro","version":"1.0","type":"link"}