{"product_id":"starizona-m48-extension-3mm","title":"Starizona M48 Extension - 3mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 3mm of spacing to an imaging train\u003c\/li\u003e\n\u003cli\u003eStandard M48 male and female threads\u003c\/li\u003e\n\u003cli\u003ePrecision component for achieving correct back focus\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 Extension - 3mm\u003c\/h2\u003e\n\u003cp\u003eThe Starizona M48 Extension adds a fixed 3mm of length to any standard M48 threaded imaging train. This specific 3mm length is ideal for making small, precise adjustments to achieve the critical back focus distance required by many optical correctors and reducers.\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\u003eFine-Tuning Back Focus with 3mm of M48 Spacing\u003c\/h3\u003e\n\u003cp\u003eMost focal reducers and field flatteners specify a precise back focus distance for optimal performance. Achieving this exact spacing with standard adapters can be difficult, often leaving you a few millimeters short. The Starizona 3mm M48 Extension provides the small, incremental adjustment needed to dial in that distance perfectly. By inserting this male\/female spacer into your M48 threaded setup, you can eliminate spacing errors that cause elongated stars at the edge of the field.\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\"\u003eWhen would I use the Starizona M48 Extension - 3mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would use this 3mm extension when your existing adapters and spacers leave you just short of the required back focus for your flattener or reducer. It is designed for fine-tuning your imaging train when larger spacers are too long.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat threads does the Starizona 3mm Extension use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe extension uses standard \u003cstrong\u003eM48 threads\u003c\/strong\u003e. It has male threads on one side and female threads on the other, allowing it to be inserted anywhere in an M48-threaded imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Starizona M48 Extension - 3mm part of a set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a single 3mm extension. Starizona produces M48 extensions in various lengths, allowing you to choose the specific spacing you need to complete 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\u003eThreads\u003c\/td\u003e\n\u003ctd\u003eM48 (male\/female)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Length\u003c\/td\u003e\n\u003ctd\u003e3mm\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 Extension - 3mm\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":68045008929053,"sku":"STZ-EXTM48-3","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-M48-Extension-1_5ab12ed8-a361-480e-93c4-ada9d12e76f4.jpg?v=1794410556","url":"https:\/\/davidastro.com\/en-int\/products\/starizona-m48-extension-3mm","provider":"David Astro","version":"1.0","type":"link"}