{"product_id":"zwo-m54-m48-adapter","title":"ZWO M54-M48 Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M54 female threads to M48 male threads\u003c\/li\u003e\n\u003cli\u003eZero-profile design preserves critical back focus\u003c\/li\u003e\n\u003cli\u003eConverts larger M54 ports to the common M48 standard\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\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\u003eZWO M54 to M48 Adapter\u003c\/h2\u003e\n\u003cp\u003eThe ZWO M54 to M48 Adapter provides a direct, zero-length conversion from the M54 thread standard to the widely used M48 format. This adapter features M54 male threads on one side and M48 female threads on the other, allowing you to connect M48 accessories directly without altering your back focus distance. This component is covered by a ZWO 2-year warranty.\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\u003eA Zero-Profile M54 to M48 Connection\u003c\/h3\u003e\n\u003cp\u003eThis adapter is engineered to solve a common connection problem without introducing new ones. By stepping M54 threads down to M48 with no flange or added optical length, it ensures your carefully calculated back focus remains unchanged. This is critical when connecting correctors, flatteners, or filter wheels where every millimeter of spacing counts for maintaining a flat field and sharp stars edge-to-edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrating M48 Accessories into Larger Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eMany modern focusers and full-frame cameras utilize a larger M54 connection to prevent vignetting. However, the vast majority of flatteners, reducers, and filter wheels are standardized on the M48 (2-inch filter) thread. This black-anodized adapter bridges that gap, allowing you to securely integrate your existing M48 accessories into a larger-format imaging train without compromising mechanical rigidity or optical spacing.\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 ZWO M54 to M48 Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary use is to connect an accessory with male M48 threads, such as a 2\" filter wheel or field flattener, to a camera, focuser, or corrector that has female M54 threads. It adapts the thread size 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\"\u003eHow does the ZWO M54 to M48 Adapter affect back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt has \u003cstrong\u003ezero effect on back focus\u003c\/strong\u003e. The adapter is designed without a flange or shoulder, meaning it does not add any optical path length. Your back focus distance is preserved exactly as if the two connected components had matching native threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ZWO adapter to attach a ZWO EFW with M48 threads to an ASI camera with an M54 tilt plate?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal scenario for this adapter. It allows a direct, rigid, and spacing-neutral connection between a camera's M54 interface and an M48-threaded accessory like a ZWO electronic filter wheel (EFW).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the M48 side of this adapter threaded to accept 2\" filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The M48 side has female threads designed to accept a male-threaded accessory. It is not designed to have a 2\" filter screwed into it directly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use this ZWO M54 to M48 adapter instead of a generic M54 to T2 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eM48 threads (often called \"Wide T\") have a larger clear aperture than standard T2 (M42) threads. Using this adapter maintains the larger M48 light path, which is crucial for preventing vignetting on full-frame or large APS-C sensors. A T2 adapter would create a bottleneck in the light path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the physical length of the ZWO M54-M48 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it has a physical length, its \u003cstrong\u003eoptical length is zero\u003c\/strong\u003e. The design ensures that when you thread an M48 accessory into it, the shoulder of that accessory meets the shoulder of the M54 component, exactly as if they were connected directly. This prevents any change in critical back focus spacing.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eZWO-M54-M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Side A\u003c\/td\u003e\n\u003ctd\u003eM54 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Side B\u003c\/td\u003e\n\u003ctd\u003eM48 Female (Wide T)\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\"\u003eZWO M54 Male to M48 Female 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\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\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\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":50045835968797,"sku":"ZWO-M54-M48","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ZWO-M54-M48-1.jpg?v=1749238780","url":"https:\/\/davidastro.com\/fr-us\/products\/zwo-m54-m48-adapter","provider":"David Astro","version":"1.0","type":"link"}