{"product_id":"askar-111f-0-74x-reducer","title":"Askar 111F 0.74x Reducer","description":"\u003ch2\u003e\u003cspan\u003eAskar 111F 0.74x Reducer\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cspan\u003eSpeed up your deep-sky imaging setup with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAskar 111F 0.74x Reducer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, specially optimized for the Askar 111F flat-field refractor.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eReduces the Askar 111F focal length to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e566mm\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and changes the focal ratio to a faster \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ef\/5.1\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, helping deliver wider views and shorter exposure times.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePerfect for capturing large nebulae, open star clusters, faint deep-sky targets, and fast-moving celestial objects with greater efficiency.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBuilt with integrated field-flattening correction to help reduce field curvature and keep stars sharp and clean from the center of the image to the edges.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSupports a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e44mm full-frame image circle\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, making it a strong choice for full-frame astrophotography setups.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFeatures a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003etriplet optical design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for reliable correction and high-quality image performance when paired with the Askar 111F.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eProvides a standard \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e55mm back focus\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e from the base of the M48 male thread, making camera spacing straightforward for many imaging setups.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eBoth ends feature \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eM68x1 threads\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, offering a stable and adaptable connection within the optical train.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWorks conveniently with the Askar 111F photographic extension tube, which includes \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eM54x0.75\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eM48x0.75\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e adapters for direct connection.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eRear adapter ring includes a built-in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eM48x0.75 standard 2-inch filter thread\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, allowing direct installation of compatible astronomy filters.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePrecision CNC-machined construction gives the reducer a durable, high-quality feel while maintaining accurate mechanical alignment.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncludes front and rear metal threaded caps to help protect the optics from dust when the reducer is not in use.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h1\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProduct Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Focal Reducer \/ Field-Flattening Reducer\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Askar\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 111F 0.74x Reducer\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCompatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Askar 111F\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eReduction Factor:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.74x\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eResulting Focal Length with Askar 111F:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 566mm\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eResulting Focal Ratio with Askar 111F:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e f\/5.1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOptical Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Triplet design\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eImage Circle:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 44mm full-frame image circle\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eField Correction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Built-in field-flattening correction\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBack Focus:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 55mm from the base of the M48 male thread\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRear-End Thread Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e M68x1\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eConnection Threads:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e M68x1 on both ends\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFilter Thread:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Built-in M48x0.75 standard 2-inch filter thread\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCompatible Adapter Support:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e M54x0.75 and M48x0.75 adapters from the 111F photographic extension tube\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eWeight:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.5kg\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eConstruction:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Precision CNC-machined body\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRecommended Use:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Wide-field deep-sky astrophotography, full-frame imaging, nebulae, star clusters, and faint celestial targets\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003e\u003cspan\u003eWhat's in the box?\u003c\/span\u003e\u003c\/h1\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003eAskar 111F 0.74x Reducer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFront metal threaded cap\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRear metal threaded cap\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":52717169639744,"sku":"ASK-111F-RED-0.74","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/9904\/6464\/files\/1_73de989d-ad9f-4ec5-904d-7b411b8b7114.webp?v=1782941006","url":"https:\/\/astroworldtelescopes.com\/products\/askar-111f-0-74x-reducer","provider":"Astroworld Telescopes","version":"1.0","type":"link"}