{"product_id":"player-one-m54m-m54m-2mm-adapter","title":"Player One M54M-M54M Adapter - 2mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 2mm of Optical Path Length\u003c\/li\u003e\n\u003cli\u003eConnects Two M54x0.75 Female Threads\u003c\/li\u003e\n\u003cli\u003eFunctions as a Spacer and Gender Changer\u003c\/li\u003e\n\u003cli\u003eStandard M54 x 0.75mm Thread Pitch\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-M54M 2MM Adapter\u003c\/h2\u003e\n\u003cp\u003eThe M54M-M54M 2MM Adapter provides exactly 2mm of optical path length, converting an M54 female port into an M54 male thread with a standard 0.75mm pitch. This adapter is a fundamental component for achieving precise back focus and connecting M54-threaded accessories in a rigid, secure 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\u003ePrecise 2mm Spacing for M54 Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eThis adapter serves a critical dual role in any astrophotography setup using the M54 standard. It acts as both a gender changer, allowing you to connect two components with female M54 threads, and as a fixed 2mm spacer for fine-tuning your back focus distance. Its thin profile is essential when you are just a few millimeters short of the ideal sensor-to-corrector spacing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Focus Correction:\u003c\/strong\u003e Use this adapter to make small, precise increases to your imaging train length to achieve perfect star shapes across the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Mating:\u003c\/strong\u003e Securely connect accessories like off-axis guiders, filter wheels, and camera rotators that both terminate in female M54x0.75 threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid Connection:\u003c\/strong\u003e Machined as a single piece, it provides a non-flexing link between heavy components, maintaining optical alignment.\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 of the M54M-M54M 2MM Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary use of the M54M-M54M 2MM Adapter is to connect two pieces of equipment that both have female M54x0.75 threads, while simultaneously adding exactly \u003cstrong\u003e2mm\u003c\/strong\u003e of spacing to the imaging train. This is common for fine-tuning back focus or mating specific accessories like filter wheels and off-axis guiders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this 2mm adapter help with back focus on my refractor and field flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMost field flatteners and reducers have a strict back focus requirement, often 55mm. If your current camera and adapters leave you at 53mm, this M54M-M54M 2MM Adapter is the perfect solution to add the final 2mm needed to reach the optimal distance, ensuring sharp stars to the edge of your frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the M54M-M54M 2MM Adapter to connect a camera to a filter wheel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, if both your camera's front plate and the telescope-side of your filter wheel have female M54x0.75 threads, this adapter will join them. It acts as a male-to-male \"gender changer\" to bridge the connection while adding 2mm of length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the thread pitch of the M54M-M54M 2MM Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter uses the standard M54 photographic thread pitch, which is \u003cstrong\u003e0.75mm\u003c\/strong\u003e. This ensures compatibility with the vast majority of astronomy cameras, filter wheels, and correctors that use the M54 standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the M54M-M54M 2MM Adapter threaded for filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This adapter is a spacing and gender-changing component. It has male threads on both sides and does not have internal threads for accepting standard 2\" (M48) filters.\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 2mm adapter instead of a variable spacer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA fixed adapter like this M54M-M54M 2MM Adapter provides a more rigid and tilt-free connection than most variable spacers. When you know you need exactly 2mm, a fixed spacer is the most secure way to achieve it without introducing potential optical alignment issues.\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 \/ Spacer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection (Side 1)\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection (Side 2)\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical 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-M54M 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":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\/products\/player-one-m54m-m54m-2mm-adapter","provider":"David Astro","version":"1.0","type":"link"}