Visit Askar 131F 0.74\u00d7 Reducer<\/strong> is a focal reducer specially designed for telescopes. Askar 131F Flat-Field<\/strong>. This premium accessory transforms the instrument into a faster, more versatile astrophotography platform, by reducing the focal ratio of f\/7.5 to f\/5.6<\/strong>.<\/p>\n Thanks to this reduction in focal length, the exposure time required is greatly reduced, improving the efficiency of imaging sessions while extending the photographic field.<\/p>\n The reducer also incorporates optimized field correction to preserve fine, even stars across the entire surface of modern Full Frame sensors.<\/p>\n When installed on the Askar 131F, this reducer reduces the focal length from :<\/p>\n This transformation brings several major benefits:<\/p>\n The gain in speed is particularly interesting for imaging:<\/p>\n The reducer doesn't just reduce the focal length. It also incorporates a field correction system to effectively eliminate field curvature.<\/p>\n The result is excellent star quality:<\/p>\n This advanced correction makes it possible to exploit modern high-resolution cameras to the full without any significant degradation of peripheral stars.<\/p>\n Askar 131F 0.74\u00d7 Reducer is based on an optical formula with three lenses<\/strong> carefully optimized for the Askar 131F scope.<\/p>\n This design ensures :<\/p>\n The supported image circle reaches 44 mm<\/strong>, perfectly suited to modern full-format sensors.<\/p>\n The gearbox adopts a standard backfocus of 55 mm<\/strong> measured from M48 male thread.<\/p>\n This standard distance makes integration with :<\/p>\n The package also includes :<\/p>\n The rear adapter directly incorporates a 2\" M48x0.75 filter thread for easy installation of astronomical filters.<\/p>\n Like all Askar top-of-the-range accessories, this gearbox benefits from precision CNC manufacturing to ensure :<\/p>\n The gearbox is supplied with threaded metal plugs at the front and rear to protect optical surfaces during transport and storage.<\/p>\n The gearbox has been specifically developed to work with the Askar 131F to guarantee :<\/p>\n M72x1 threads on both sides ensure a solid, precise connection to the scope and imaging accessories.<\/p>\n The Askar 131F 0.74\u00d7 Reducer is the ideal accessory for astrophotographers who want to exploit the full potential of their Askar 131F.<\/p>\n By transforming the telescope into a fast astrograph at f\/5.6, while retaining excellent Full Frame correction, this reducer makes for greater efficiency, photographic field of view and ease of use.<\/p>\n Its advanced optical design, premium mechanics and perfect compatibility with the 131F make it a must-have accessory for demanding deep-sky imaging enthusiasts.<\/p>","protected":false},"excerpt":{"rendered":" Askar 131F 0.74\u00d7 R\u00e9ducteur Correcteur Full Frame pour Askar 131F Le Askar 131F 0.74\u00d7 Reducer est un r\u00e9ducteur de focale sp\u00e9cialement con\u00e7u pour la lunette Askar 131F Flat-Field. Cet accessoire premium permet de transformer l\u2019instrument en une plateforme d\u2019astrophotographie plus rapide et plus polyvalente, en r\u00e9duisant le rapport focal de f\/7.5 \u00e0 f\/5.6. Gr\u00e2ce \u00e0 […]<\/p>\n","protected":false},"featured_media":14976,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[382],"product_cat":[650],"product_tag":[],"class_list":["post-14974","product","type-product","status-publish","has-post-thumbnail","product_brand-askar","product_cat-rducteurs-correcteurs-ap","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/14974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=14974"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/14976"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=14974"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=14974"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=14974"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=14974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Turn your Askar 131F into a fast f\/5.6 astrograph<\/h3>\n
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Full Frame integrated field correction<\/h3>\n
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High-performance triplet optical design<\/h3>\n
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Standard backfocus 55 mm<\/h3>\n
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Premium mechanical engineering<\/h3>\n
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Compatibility and easy installation<\/h3>\n
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Summary table of technical specifications<\/h3>\n
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\n Features<\/th>\n Value<\/th>\n<\/tr>\n \n Compatibility<\/td>\n Askar 131F Flat-Field<\/td>\n<\/tr>\n \n Reduction factor<\/td>\n 0.74\u00d7<\/td>\n<\/tr>\n \n Resulting focus<\/td>\n 733.6 mm<\/td>\n<\/tr>\n \n Resulting focal ratio<\/td>\n f\/5.6<\/td>\n<\/tr>\n \n Optical type<\/td>\n Triplet corrector\/reducer<\/td>\n<\/tr>\n \n Image circle<\/td>\n 44 mm Full Frame<\/td>\n<\/tr>\n \n Backfocus<\/td>\n 55 mm from M48 male thread<\/td>\n<\/tr>\n \n Main thread<\/td>\n M72x1<\/td>\n<\/tr>\n \n Adapters included<\/td>\n M54x0.75 and M48x0.75<\/td>\n<\/tr>\n \n Filter compatibility<\/td>\n Integrated 2\u2033 M48 filter thread<\/td>\n<\/tr>\n \n Weight<\/td>\n 0.56 kg<\/td>\n<\/tr>\n \n Manufacturing<\/td>\n High-precision CNC aluminum<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Why choose Askar 131F 0.74\u00d7 Reducer?<\/h3>\n