{"product_id":"starizona-m48-extension-7mm","title":"Starizona M48 Extension - 7mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 7mm 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 - 7mm\u003c\/h2\u003e\n      \u003cp\u003eThe Starizona M48 Extension is a precision-machined spacer designed to add exactly 7mm of length to an M48-threaded optical train. This component is essential for astrophotographers who need to fine-tune the distance between a corrector and a camera sensor to achieve perfect back focus.\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\u003ePrecise 7mm Spacing for M48 Imaging Trains\u003c\/h3\u003e\n      \u003cp\u003eAchieving the exact back focus distance specified by a field flattener or reducer is critical for sharp stars across the entire image frame. The Starizona M48 Extension provides a fixed, non-flexing 7mm of additional spacing to help you dial in that perfect distance. With standard male and female M48 threads, it integrates seamlessly into any 2-inch filter-threaded imaging setup, allowing you to stack it with other extensions to reach a specific total length.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\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 are the threads on the Starizona 7mm Extension?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Starizona 7mm Extension features \u003cstrong\u003emale M48 threads\u003c\/strong\u003e on one side and \u003cstrong\u003efemale M48 threads\u003c\/strong\u003e on the other, allowing it to be inserted anywhere in a standard 2-inch accessory train.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhen would I need a 7mm M48 extension like this Starizona model?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou would use this 7mm extension when the total distance from your camera sensor to your flattener or reducer is just short of the required back focus. It provides a small, precise increment of spacing that is often needed to eliminate field curvature and achieve sharp stars corner-to-corner.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan the Starizona M48 7mm extension be combined with other spacers?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. Astrophotography imaging trains are modular. This 7mm extension is designed to be combined with other M48 spacers, filter wheels, or off-axis guiders to achieve the total back focus distance required by your specific optical system.\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\u003e7mm\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 - 7mm\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":68045011484957,"sku":"STZ-EXTM48-7","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_03e3e22e-2b05-486f-87ff-63c4f9ba4030.jpg?v=1794410563","url":"https:\/\/davidastro.com\/en-us\/products\/starizona-m48-extension-7mm","provider":"David Astro","version":"1.0","type":"link"}