{"product_id":"starizona-variable-m48-t-threaded-adapter-20-30mm","title":"Starizona Variable M48 Adapter 20-30mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eM48 Filter Threads (Male and Female)\u003c\/li\u003e\n\u003cli\u003eAdjustable from 20mm to 30mm\u003c\/li\u003e\n\u003cli\u003eLocking Ring for Secure Spacing\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\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 Variable M48 T-Threaded Adapter 20-30mm\u003c\/h2\u003e\n\u003cp\u003eThis Starizona Variable Adapter provides precise M48-threaded spacing for your imaging train, with an adjustable length from 20mm to 30mm. It is an essential tool for achieving the exact back focus required by field flatteners and focal reducers, eliminating the need to stack multiple fixed-length extension tubes.\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 M48 Spacing from 20mm to 30mm\u003c\/h3\u003e\n\u003cp\u003eAchieving sharp, coma-free stars across your entire image sensor depends on maintaining a precise distance between your corrector optics and the camera sensor. This Starizona adapter simplifies that process by offering a continuous adjustment range from 20mm to 30mm. You can dial in the exact spacing your optical system needs, then secure it in place to prevent any shift during an imaging session.\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 is the purpose of the Starizona Variable M48 Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Starizona Variable M48 Adapter is used to achieve a precise back focus distance in an astronomical imaging setup. It allows you to fine-tune the spacing between your camera and a focal reducer or field flattener to ensure optimal optical correction across the field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the adjustment range for this Starizona adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis specific model is adjustable from \u003cstrong\u003e20mm to 30mm\u003c\/strong\u003e. It features M48 threads on both ends, making it compatible with most 2-inch filter-threaded accessories and camera connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Starizona 20-30mm adapter help achieve a 55mm back focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMany correctors require a standard 55mm back focus. If your camera has a native back focus of 17.5mm, and you have a 10mm M48 extension, you would have 27.5mm of spacing. You would need another 27.5mm to reach 55mm. This 20-30mm adapter allows you to set the spacing to exactly 27.5mm, perfectly completing your imaging train.\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\u003c\/td\u003e\n\u003ctd\u003eM48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustable Length\u003c\/td\u003e\n\u003ctd\u003e20-30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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":68045000835357,"sku":"STZ-VAR-M48-MEDIUM","price":63.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-Variable-M48-Adapters-1_2e74407f-f496-438d-b41e-d8164cb816ff.jpg?v=1794410534","url":"https:\/\/davidastro.com\/products\/starizona-variable-m48-t-threaded-adapter-20-30mm","provider":"David Astro","version":"1.0","type":"link"}