{"product_id":"starizona-m42-extension-10mm","title":"Starizona M42 Extension - 10mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdds 10mm of spacing to an optical train\u003c\/li\u003e\n\u003cli\u003eStandard M42 male and female threads\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 M42 Extension - 10mm\u003c\/h2\u003e\n\u003cp\u003eThe Starizona M42 Extension adds exactly 10mm of length to any imaging train using standard M42 threads. This single-piece tube features both male and female M42 threads, allowing it to be inserted between M42-threaded accessories to help achieve the precise back focus required by your flattener, reducer, or coma corrector.\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\u003eAchieving 10mm of M42 Back Focus\u003c\/h3\u003e\n\u003cp\u003eBack focus is the critical distance from the last optical element in your train to the camera's sensor. The Starizona M42 Extension provides a fixed 10mm of that required distance. For many imaging setups, achieving the specified back focus is a matter of combining different extension tube lengths, and this 10mm piece serves as a fundamental building block for fine-tuning that spacing.\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 primary use for the Starizona M42 Extension - 10mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts sole purpose is to add a precise \u003cstrong\u003e10mm\u003c\/strong\u003e of length to an M42-threaded imaging train. This is done to achieve the exact back focus distance required by an optical corrector like a field flattener or focal reducer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy flattener requires 55mm of back focus, but my camera and OAG only provide 45mm. Will the Starizona 10mm extension solve this?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. In that scenario, this \u003cstrong\u003e10mm\u003c\/strong\u003e extension is designed to fill that exact 10mm gap in your M42-threaded optical path, bringing your total spacing to the required 55mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Starizona 10mm extension to image the Orion Nebula (M42) with my specific camera and telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis extension can be a critical component for imaging any object, including the Orion Nebula (M42), if your optical train requires exactly \u003cstrong\u003e10mm\u003c\/strong\u003e of additional M42 spacing. Correct spacing is essential for sharp stars across the field, regardless of the target.\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\u003eM42 (male\/female)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e10mm\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 M42 Extension - 10mm\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":68045008109853,"sku":"STZ-EXTM42-10","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-M42-Extension-1_3c876673-fcde-4590-8439-459b62b98abf.jpg?v=1794410555","url":"https:\/\/davidastro.com\/en-us\/products\/starizona-m42-extension-10mm","provider":"David Astro","version":"1.0","type":"link"}