{"product_id":"starizona-m48-to-m54-step-ring","title":"Starizona M48 to M54 Step Ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects M48 male accessories to M54 female ports\u003c\/li\u003e\n\u003cli\u003eInner Thread: M48 Female\u003c\/li\u003e\n\u003cli\u003eOuter Thread: M54 Male\u003c\/li\u003e\n\u003cli\u003eAdds 0mm of optical path length\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\u003eStarizona M48 to M54 Step Ring\u003c\/h2\u003e\n\u003cp\u003eThe Starizona M48 to M54 Step Ring is a precision adapter designed to connect components with M48 threads to ports requiring M54 threads. This ring adds exactly 0mm of optical path length, making it an essential tool for maintaining critical back focus in a complex 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\u003eA Zero-Profile M48 to M54 Solution\u003c\/h3\u003e\n\u003cp\u003eIn any astrophotography setup, back focus is a critical and often unforgiving tolerance. This Starizona adapter solves the common problem of mismatched threads between M48 accessories and M54 ports without consuming any of that distance. The ring is engineered so that the female M48 threads are fully contained within the male M54 fitting, resulting in an added optical path of precisely 0mm.\u003c\/p\u003e\n\u003cp\u003eThis zero-profile design allows you to connect a standard 2-inch filter wheel or other M48-threaded component to a larger M54-threaded flattener or reducer, confident that you have not altered the carefully calculated spacing required for a flat field. It's a simple, robust, and optically invisible solution for integrating different components in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\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 are the threads on the Starizona M48 to M54 Step Ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Starizona M48 to M54 Step Ring features \u003cstrong\u003efemale M48 threads\u003c\/strong\u003e on the inside and \u003cstrong\u003emale M54 threads\u003c\/strong\u003e on the outside. This allows you to attach a male M48 accessory to a female M54 port.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much back focus does the Starizona M48 to M54 Step Ring use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter uses \u003cstrong\u003e0mm of back focus\u003c\/strong\u003e. Its design ensures it adds no length to the optical path, which is critical for preserving the carefully calculated spacing required by flatteners and reducers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Starizona M48 to M54 Step Ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter allows you to \"step up\" a connection in your imaging train. It solves the problem of connecting a smaller M48-threaded accessory (like a 2-inch filter holder) to a larger M54-threaded port on a focuser or field corrector.\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\u003eInner Thread\u003c\/td\u003e\n\u003ctd\u003eM48 Female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Thread\u003c\/td\u003e\n\u003ctd\u003eM54 Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdded Optical Path\u003c\/td\u003e\n\u003ctd\u003e0mm\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\"\u003eStarizona M48 to M54 Step Ring\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\u003ca href=\"https:\/\/davidastro.com\/pages\/starizona-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarizona Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starizona","offers":[{"title":"Default Title","offer_id":68045006078237,"sku":"STZ-STEP-M48-M54","price":21.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-M48-to-M54-Step-Ring-1_22347fab-16ed-4939-ba98-d2e8808d8322.jpg?v=1794410547","url":"https:\/\/davidastro.com\/products\/starizona-m48-to-m54-step-ring","provider":"David Astro","version":"1.0","type":"link"}