{"product_id":"daystar-0-33x-tilt-reducer","title":"Daystar 0.33X Tilt Reducer","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e0.33X Focal Reduction Factor\u003c\/li\u003e\n\u003cli\u003eDesigned for the Daystar Combo Quark Filter\u003c\/li\u003e\n\u003cli\u003eEnables Full-Disk Solar Imaging with Small Sensors\u003c\/li\u003e\n\u003cli\u003eReduces Exposure Times by Approximately 9x\u003c\/li\u003e\n\u003cli\u003eSupports 17.5mm and 12.5mm Camera Backfocus\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\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\u003eDaystar 0.33X Tilt Reducer\u003c\/h2\u003e\n      \u003cp\u003eWith a powerful 0.33X reduction factor, the Daystar 0.33X Tilt Reducer makes full-disk solar imaging possible when paired with the Combo Quark filter and a small-sensor camera. This reducer is engineered for a native 17.5mm backfocus and is also compatible with 12.5mm systems, dramatically widening your field of view for comprehensive solar portraits.\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\u003e0.33X Reduction: Full-Disk Solar Imaging with Small Sensors\u003c\/h3\u003e\n      \u003cp\u003eThis is Daystar's most powerful focal reducer, compressing your telescope's focal length to just one-third of its native value. This transformation allows you to fit the entire solar disk onto smaller imaging sensors, a task that is often impossible at a telescope's native focal length. The 0.33X reduction also shortens exposure times by a factor of approximately nine, allowing you to use higher frame rates to freeze atmospheric seeing and capture sharper details.\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\u003eFringe Control and 17.5mm Backfocus for Quark Filters\u003c\/h3\u003e\n      \u003cp\u003eBy creating a much faster focal ratio, the 0.33X reducer significantly minimizes interference fringes (Newton's rings), a common artifact in narrowband solar imaging. This reduces or even eliminates the need for filter tilt, simplifying the tuning process for an evenly illuminated, high-contrast image. The reducer is designed for direct connection to cameras with a 17.5mm backfocus, and can also achieve a 12.5mm backfocus when used with a 5mm spacer (not included).\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\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 is the main purpose of the Daystar 0.33X Tilt Reducer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary purpose of the Daystar 0.33X Tilt Reducer is to shrink the image scale of a telescope, allowing imagers to capture the \u003cstrong\u003eentire solar disk\u003c\/strong\u003e on cameras with smaller sensors. It is specifically designed for use with the Daystar Combo Quark H-alpha filter.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Daystar 0.33X Tilt Reducer affect exposure times for solar imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe 0.33X reduction makes the effective focal ratio of your telescope much faster. This concentrates light more intensely on the sensor, reducing required exposure times to approximately \u003cstrong\u003eone-ninth\u003c\/strong\u003e of what they would be without the reducer. This is a major advantage for \"lucky imaging\" techniques.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Daystar 0.33X Tilt Reducer to image the full solar disk with my ZWO ASI174MM?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhether you can achieve a full-disk image depends on your telescope's native focal length. However, the Daystar 0.33X Tilt Reducer is specifically designed to make this possible for many common telescope and small-sensor combinations like the ASI174MM. It dramatically increases your chances of fitting the entire sun in the frame.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is it called a \"Tilt Reducer\" if it requires less tilt?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe name can be confusing. It's a focal reducer that, as a side effect of creating a faster optical system, reduces the interference patterns that you would normally compensate for by tilting a narrowband filter. Because it minimizes the need for tilt adjustments, it's named for the problem it helps solve.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat backfocus do I need for my camera with the Daystar 0.33X Tilt Reducer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Daystar 0.33X Tilt Reducer is optimized for two common backfocus distances:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003e17.5mm:\u003c\/strong\u003e This is the native backfocus and is common for many ZWO and QHY cameras.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e12.5mm:\u003c\/strong\u003e This distance can be achieved by adding a standard 5mm T-thread spacer between the reducer and your camera.\u003c\/li\u003e\n    \u003c\/ul\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\u003eReduction Factor\u003c\/td\u003e\n\u003ctd\u003e0.33X\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePrimary Compatibility\u003c\/td\u003e\n\u003ctd\u003eDaystar Combo Quark Hydrogen Alpha Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNative Backfocus\u003c\/td\u003e\n\u003ctd\u003e17.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAlternate Backfocus\u003c\/td\u003e\n\u003ctd\u003e12.5mm (with user-supplied 5mm spacer)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eT-Thread (M42x0.75)\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\"\u003e0.33X Tilt Reducer\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\/daystar-filters-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eDaystar Filters Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Daystar Filters","offers":[{"title":"Default Title","offer_id":52935164625181,"sku":"DAY-IEQT33","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/DaystarFilters-Daystar-0-33X-Tilt-Reducer-1_b33854df-f3a1-4183-8d4f-9df40681e58e.jpg?v=1789520757","url":"https:\/\/davidastro.com\/fr-us\/products\/daystar-0-33x-tilt-reducer","provider":"David Astro","version":"1.0","type":"link"}