{"product_id":"wanderer-astro-m42-female-to-m54-male-adapter-4mm-thread-0mm-extension","title":"Wanderer Astro M42 Female to M54 Male Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M42 x 0.75 female threads to M54 x 0.75 male threads\u003c\/li\u003e\n\u003cli\u003eAdds 0mm to the optical path length\u003c\/li\u003e\n\u003cli\u003eIdeal for maintaining critical back focus distances\u003c\/li\u003e\n\u003cli\u003eFeatures a 4mm thread depth for secure component mating\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\u003eM42 female to M54 male adapter (4mm thread, 0mm extension)\u003c\/h2\u003e\n      \u003cp\u003eThis M42 female to M54 male adapter provides a direct, zero-length connection between two common astronomical thread standards, adding precisely 0mm to the optical path. It features a 4mm male thread depth to ensure a secure, rigid fit when connecting M42 accessories like cameras and off-axis guiders to larger M54 components such as filter wheels and field flatteners.\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\u003eConnecting M42 and M54 Gear with a 0mm Path Length\u003c\/h3\u003e\n      \u003cp\u003eThis adapter solves a common problem in astrophotography: physically connecting a component with female M42 T-threads to a device with male M54 threads. By providing a direct conversion with 0mm of extension, it allows you to integrate your existing M42-threaded gear into a larger M54 imaging train without altering the designed spacing of your system.\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 Importance of 0mm Extension for Precise Back Focus\u003c\/h3\u003e\n      \u003cp\u003eMany optical systems, especially those using field flatteners or focal reducers, have a strict back focus requirement, often specified to within a fraction of a millimeter. This adapter's key feature is its 0mm extension length. It performs the thread conversion without consuming any of your available back focus, preserving the precise spacing your optics need to achieve sharp stars across the entire 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\u003e4mm Thread Depth for a Secure, Low-Profile Connection\u003c\/h3\u003e\n      \u003cp\u003eThe male M54 side of the adapter is machined with a 4mm thread length. This depth is engineered to provide a robust, stable connection when threaded into a corresponding female port, preventing tilt or flexure in the imaging train. At the same time, it is short enough to avoid bottoming out in components with shallow internal threads, ensuring a flush and secure fit.\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 this M42 to M54 adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter is designed to connect a device with \u003cstrong\u003efemale M42 x 0.75 threads\u003c\/strong\u003e (like many astronomy cameras) to a device that requires a \u003cstrong\u003emale M54 x 0.75 thread\u003c\/strong\u003e connection, such as a filter wheel, corrector, or focuser. Its 0mm extension makes it ideal for setups with tight back focus tolerances.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the 0mm extension on this M42 adapter so important?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA \u003cstrong\u003e0mm extension\u003c\/strong\u003e means the adapter does not add any length to your optical path. This is critical when using optical correctors (flatteners\/reducers) that require a precise distance to the camera sensor. Using this adapter ensures you don't unintentionally alter that critical spacing, which could otherwise lead to distorted stars at the edge of your images.\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 connect my ZWO ASI camera to a Celestron EdgeHD 0.7x reducer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt depends on the specific reducer and the rest of your imaging train. While many ZWO cameras use M42 threads, you must confirm the thread type on the reducer side and ensure the total back focus distance is maintained. This adapter would be part of the calculation, used to bridge M42 and M54 components while adding 0mm to the total length.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this M42 to M54 adapter differ from one with a 5mm extension?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe only difference is the optical path length. This \u003cstrong\u003e0mm adapter\u003c\/strong\u003e is a pure thread converter. An adapter with a 5mm extension is a \"spacer\" that also converts threads. You would choose the 0mm version when you need to maintain existing spacing and the 5mm version when you specifically need to add 5mm of distance to achieve correct back focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 4mm thread length on this M42 adapter signify?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003e4mm thread length\u003c\/strong\u003e refers to the physical length of the male M54 threads. This provides sufficient engagement for a strong, tilt-free connection without being so long that it risks hitting internal components like a filter inside a filter wheel.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter cause vignetting with my full-frame M42 camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter itself has a clear aperture defined by the M42 thread (roughly 42mm). While the adapter itself is unlikely to cause vignetting, the M42 connection itself can be a bottleneck for full-frame sensors (which have a ~43mm diagonal). Significant vignetting, if it occurs, is typically caused by other M42-sized components in the optical train, not the adapter itself.\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      \n    \u003c\/tbody\u003e\n  \u003c\/table\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\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\/wanderer-astro-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eWanderer Astro 2-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wanderer Astro","offers":[{"title":"Default Title","offer_id":52940501975325,"sku":"WA-M42F-M54M","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/WandererAstro-Wanderer-ETA-M54-10_bf2db872-0259-49e8-8edf-c8dd59e44b11.jpg?v=1789571355","url":"https:\/\/davidastro.com\/fr-int\/products\/wanderer-astro-m42-female-to-m54-male-adapter-4mm-thread-0mm-extension","provider":"David Astro","version":"1.0","type":"link"}