{"product_id":"0-75x-reducer-f5-m59-astronomical-accessory-support-full-frame-camera-photography-for-askar-91f-telescope","title":"0.75X Reducer F5 M59 Astronomical Accessory Support Full Frame Camera Photography for ASKAR 91F Telescope","description":"\u003cp\u003e\u003cb\u003eIntroduction:\u003c\/b\u003e\u003cbr\u003e- The 0.75X reducer can bring Askar 91F's focal ratio down to F5, providing not only a faster focal ratio but also built-in field-flattening correction. The shorter focal ratio delivers a wider field of view and a faster exposure time, making it ideal for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.\u003cbr\u003e\u003cbr\u003e- The 91F 0.75X reducer adopts a triplet design and supports a 44mm full-frame image circle.  The back focus from the M48 thread is a standard 55mm. Both end threads are M59x1. The 91F photographic extension tube includes M54x0.75 and M48x0.75 adapters for direct and convenient connection to the 0.75x reducer. The reducer features a built-in M48x0.75 2-inch filter thread, allowing for direct filter installation and use. The entire reducer is CNC-machined and comes with front and rear metal threaded caps to protect against dust when not in use.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecification:\u003c\/b\u003e\u003cbr\u003e- (After attaching) 91F Focal length: 455mm\u003cbr\u003e- (After attaching) 91F Focal ratio: f\/5\u003cbr\u003e- Lens Number: Triplet design\u003cbr\u003e- Back Focus: 55mm (from the base of M48 male thread)\u003cbr\u003e- Weight: 0.3kg\u003cbr\u003e- Rear-end thread type: M59x1\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Reducer\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cfont color=\"#ff0000\"\u003eNote:\u003cbr\u003e- The ASKAR 91F is not included.\u003c\/font\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/102227\/102227-01.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/102227\/102227-02.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/102227\/102227-03.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/102227\/102227-04.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1024px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/102227\/102227-05.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products, Audio Amplifer and Decoders","offers":[{"title":"Default Title","offer_id":41029094342705,"sku":"102227","price":182.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/1779325651-3.jpg?v=1780389414","url":"https:\/\/www.thanksbuyer.com\/de\/products\/0-75x-reducer-f5-m59-astronomical-accessory-support-full-frame-camera-photography-for-askar-91f-telescope","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}