{"product_id":"baader-planetarium-adapter-m54a-to-m48i","title":"Baader Planetarium Adapter M54a to M48i","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M54 Male Threads to M48 Female Threads\u003c\/li\u003e\n\u003cli\u003eEnables Use of Standard 2-inch (M48) Filters\u003c\/li\u003e\n\u003cli\u003eLow-Profile Design Minimizes Back Focus Consumption\u003c\/li\u003e\n\u003cli\u003ePrecision-Machined for Secure, No-Flexure Connections\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish to Reduce Stray Light\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\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\u003eAdapter M54a to M48i\u003c\/h2\u003e\n      \u003cp\u003eThis Adapter M54a to M48i provides the essential connection between components with M54 male threads and the universal M48 female thread standard used by 2-inch astronomy filters. It directly converts an M54 (male) output from a corrector or focuser into an M48 (female) input, allowing you to integrate critical filtration into your imaging train right where it's needed.\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\u003eAdd M48 Filter Capability to Your M54 Imaging Train\u003c\/h3\u003e\n      \u003cp\u003eMany modern flatteners, reducers, and focusers terminate in an M54 male thread. This adapter allows you to directly attach any standard 2-inch filter, which uses the M48 x 0.75 thread pitch, without needing a complex chain of adapters. This is the most direct way to place a light pollution or narrowband filter in front of your camera sensor when using M54-threaded 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\u003eA Low-Profile Solution for Critical Back Focus\u003c\/h3\u003e\n      \u003cp\u003eEvery millimeter of back focus is a critical resource in an astrophotography setup. This adapter is designed to be as thin as possible, consuming minimal optical path length. Its purpose is to solve a connection problem without creating a spacing problem, ensuring you can still reach focus with your camera and other accessories.\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 Adapter M54a to M48i?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts primary function is to allow you to thread a standard \u003cstrong\u003e2-inch astronomy filter (M48 female thread)\u003c\/strong\u003e onto a field flattener, reducer, or focuser that has an \u003cstrong\u003eM54 male thread\u003c\/strong\u003e. It's a simple but crucial component for integrating filters into many common imaging trains.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I install a 2-inch filter using the Adapter M54a to M48i?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFirst, screw your 2-inch filter into the female M48 side of the adapter. Then, screw the male M54 side of the adapter onto the corresponding female M54 thread on your focuser or corrector. Your filter is now securely mounted in the optical path.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this M54a to M48i adapter work with my telescope's corrector?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter will work with any corrector, flattener, or accessory that outputs to an \u003cstrong\u003eM54 male (M54a) thread\u003c\/strong\u003e. It is essential to check the documentation for your specific optical accessory to confirm its output thread size before purchasing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the 'a' and 'i' in the Adapter M54a to M48i name mean?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe letters indicate the thread type. In German, 'a' stands for \u003cem\u003eAußengewinde\u003c\/em\u003e (external\/male thread) and 'i' stands for \u003cem\u003eInnengewinde\u003c\/em\u003e (internal\/female thread). So, this adapter has an M54 male thread on one side and an M48 female thread on the other.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter cause any vignetting with my full-frame camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis depends on the focal ratio of your telescope. While the M48 thread is larger than a T-ring, it can still cause some vignetting on fast optical systems (f\/4 or lower) when used with full-frame sensors. The adapter itself has a clear aperture limited by the M48 standard and is not the primary cause of vignetting in most systems.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Adapter M54a to M48i made of metal?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this adapter is machined from aluminum and anodized black. This ensures a durable, secure connection and helps to minimize internal reflections that could reduce image contrast.\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\u003eThread 1\u003c\/td\u003e\n\u003ctd\u003eM54 Male (M54a)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eThread 2\u003c\/td\u003e\n\u003ctd\u003eM48 Female (M48i)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eStep-down adapter for 2-inch filters\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\"\u003eAdapter M54a to M48i\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\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/baader-planetarium-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eBaader Planetarium Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913170153757,"sku":"BAA-2958751","price":56.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Adapter-M54a-to-M48i-1_5bb08116-1107-4d04-af56-7573b3ea60e9.jpg?v=1789087048","url":"https:\/\/davidastro.com\/fr-us\/products\/baader-planetarium-adapter-m54a-to-m48i","provider":"David Astro","version":"1.0","type":"link"}