{"product_id":"starizona-evoff-v3-field-flattener-for-skywatcher-evoguide-50ed","title":"Starizona EvoFF - Field Flattener for SkyWatcher EvoGuide 50ED","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFlattens Field for SkyWatcher EvoGuide 50ED\u003c\/li\u003e\n\u003cli\u003eCompatible with Askar 52mm Super ED Guidescope\u003c\/li\u003e\n\u003cli\u003eStandard 55mm Backfocus\u003c\/li\u003e\n\u003cli\u003eSupports APS (28mm) and Smaller Sensors\u003c\/li\u003e\n\u003cli\u003eDelivers a 6.4-Degree Corrected Field of View\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\u003eEvoFF - Field Flattener for SkyWatcher EvoGuide 50ED\u003c\/h2\u003e\n\u003cp\u003eThe Starizona EvoFF Field Flattener transforms the SkyWatcher EvoGuide 50ED into a capable wide-field imaging instrument, delivering sharp stars across a 6.4-degree field of view. It is designed for cameras with APS-C (28mm) or smaller sensors and provides a standard 55mm backfocus for easy integration with DSLRs, CMOS, and CCD cameras.\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 6.4-Degree Flat Field for APS Sensors\u003c\/h3\u003e\n\u003cp\u003eSmall, fast guidescopes like the SkyWatcher EvoGuide 50ED naturally exhibit field curvature, which renders stars at the edge of the frame as elongated streaks instead of pinpoints. The Starizona EvoFF is engineered specifically to counteract this optical aberration, producing sharp, point-like stars across the entire image. This flattener creates a fully corrected image circle suitable for sensors up to APS size (28mm diagonal), enabling an impressively vast 6.4-degree field of view on the sky. This combination effectively transforms a simple guidescope into a powerful, ultra-portable astrograph ideal for capturing large emission nebulae and sprawling star fields. The EvoFF has also been tested to work with the Askar 52mm Super ED Guidescope, offering similar wide-field imaging capabilities.\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 maximum sensor size for the Starizona EvoFF Field Flattener?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe EvoFF is designed to produce a corrected, flat field for camera sensors up to APS size, which corresponds to a diagonal of approximately \u003cstrong\u003e28mm\u003c\/strong\u003e. Using sensors larger than this may result in distorted stars at the corners of your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my DSLR camera with the EvoFF and an EvoGuide 50ED?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The EvoFF provides a standard \u003cstrong\u003e55mm backfocus\u003c\/strong\u003e, which is the correct spacing for most DSLR cameras when using a standard T-ring. This allows you to attach your DSLR directly and begin imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Starizona EvoFF compatible with any other telescopes besides the SkyWatcher EvoGuide 50ED?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the EvoFF has been tested and confirmed to work well with the \u003cstrong\u003eAskar 52mm Super ED Guidescope\u003c\/strong\u003e, providing similar wide-field imaging performance.\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\u003eCompatible Telescopes\u003c\/td\u003e\n\u003ctd\u003eSkyWatcher EvoGuide 50ED, Askar 52mm Super ED Guidescope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackfocus\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Sensor Size\u003c\/td\u003e\n\u003ctd\u003eAPS (28mm diagonal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Field of View\u003c\/td\u003e\n\u003ctd\u003e6.4 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Compatibility\u003c\/td\u003e\n\u003ctd\u003eDSLRs, Astronomical CMOS \u0026amp; CCD Cameras\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\"\u003eEvoFF Field Flattener\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":68033923186973,"sku":"STZ-EVOFF-V3","price":167.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-EvoFF-Field-Flattener-for-SkyWatcher-EvoGuide-50ED-1_e0cc2130-a3e0-4f20-971f-8a16a6eec07d.jpg?v=1794375588","url":"https:\/\/davidastro.com\/products\/starizona-evoff-v3-field-flattener-for-skywatcher-evoguide-50ed","provider":"David Astro","version":"1.0","type":"link"}