{"id":14981,"date":"2026-05-08T17:07:28","date_gmt":"2026-05-08T15:07:28","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=14981"},"modified":"2026-05-12T10:55:40","modified_gmt":"2026-05-12T08:55:40","slug":"askar-60f-0-75x-reducer","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/askar-60f-0-75x-reducer\/","title":{"rendered":"Askar 60F 0.75\u00d7 Reducer"},"content":{"rendered":"

Askar 60F 0.75\u00d7 Reducer - Full Frame Reducer for Askar 60F<\/h2>\n

Visit Askar 60F 0.75\u00d7 Reducer<\/strong> is a focal reducer specially designed for telescopes. Askar 60F Flat-Field<\/strong>. Compact, lightweight and powerful, this accessory transforms the astrograph into an even faster and more suitable system for wide-field imaging of the deep sky.<\/p>\n

Thanks to its 0.75\u00d7<\/strong>, the telescope to a focal ratio of f\/5.1<\/strong>, with advanced field correction to preserve fine, homogeneous stars even in the corners of modern Full Frame sensors.<\/p>\n

The enlarged photographic field and reduced exposure times make this reducer particularly interesting for nomadic astrophotographers and wide-field imaging enthusiasts.<\/p>\n

Turn your Askar 60F into an ultra-fast f\/5.1 astrograph<\/h3>\n

Once installed on the Askar 60F, the reducer reduces the native focal length:<\/p>\n

    \n
  • From 408 mm to 311 mm<\/li>\n
  • From f\/6.8 to f\/5.1<\/li>\n<\/ul>\n

    This reduction brings several important benefits:<\/p>\n

      \n
    • Shorter exposure times<\/li>\n
    • Wider photographic field<\/li>\n
    • Improved light collection<\/li>\n
    • More effective imaging under medium skies<\/li>\n
    • Simplified capture of large deep-sky objects<\/li>\n<\/ul>\n

      The reducer is particularly suitable for :<\/p>\n

        \n
      • The great nebulae<\/li>\n
      • Rich stellar fields<\/li>\n
      • The Milky Way's extended regions<\/li>\n
      • Large open clusters<\/li>\n
      • Weak objects requiring a lot of signal<\/li>\n<\/ul>\n

        Full Frame integrated field correction<\/h3>\n

        The Askar 60F 0.75\u00d7 Reducer does more than just shorten the focal length. It also incorporates a field correction to effectively limit field curvature and preserve excellent star quality across the entire sensor.<\/p>\n

        This design guarantees :<\/p>\n

          \n
        • Fine stars in the center of the field<\/li>\n
        • Good image homogeneity<\/li>\n
        • Excellent Full Frame compatibility<\/li>\n
        • Optimum use of modern sensors<\/li>\n<\/ul>\n

          The supported image circle reaches 44 mm<\/strong>, This makes it easy to use with full-format 24\u00d736 mm sensors.<\/p>\n

          Optimized triplet optical design<\/h3>\n

          The reducer is based on an optical formula with three lenses<\/strong> specifically optimized to work with the Askar 60F.<\/p>\n

          This formula covers :<\/p>\n

            \n
          • Uniform field reduction<\/li>\n
          • Good optical correction<\/li>\n
          • Effective aberration limitation<\/li>\n
          • Excellent compatibility with modern sensors<\/li>\n<\/ul>\n

            The result is a clean, well-corrected photographic field, perfectly suited to modern wide-field astrophotography.<\/p>\n

            Standard backfocus 55 mm<\/h3>\n

            The Askar 60F 0.75\u00d7 Reducer adopts a standard backfocus of 55 mm<\/strong> measured from M48 male thread.<\/p>\n

            This distance greatly facilitates integration with :<\/p>\n

              \n
            • Astronomical CMOS cameras<\/li>\n
            • DSLR<\/li>\n
            • Hybrid cameras<\/li>\n
            • Filter wheels<\/li>\n
            • Tilt plates<\/li>\n
            • Standard astrophotographic accessories<\/li>\n<\/ul>\n

              The photographic tube supplied with the Askar 60F includes :<\/p>\n

                \n
              • M54x0.75 adapter<\/li>\n
              • M48x0.75 adapter<\/li>\n<\/ul>\n

                Installation of the gearbox is therefore quick, simple and particularly intuitive.<\/p>\n

                2-inch filter compatibility<\/h3>\n

                The reducer incorporates a standard thread M48x0.75<\/strong> compatible with 2-inch astronomical filters.<\/p>\n

                This compatibility allows direct mounting of :<\/p>\n

                  \n
                • Narrowband filters<\/li>\n
                • Duoband filters<\/li>\n
                • Anti-light pollution filters<\/li>\n
                • UV\/IR Cut filters<\/li>\n
                • LRGB filters<\/li>\n<\/ul>\n

                  This approach greatly simplifies optical train design and reduces the need for additional adapters.<\/p>\n

                  Compact, lightweight CNC design<\/h3>\n

                  The Askar 60F 0.75\u00d7 Reducer benefits from precision CNC manufacturing ensuring :<\/p>\n

                    \n
                  • Excellent mechanical rigidity<\/li>\n
                  • Precise optical alignment<\/li>\n
                  • Good durability<\/li>\n
                  • Top-of-the-range finish<\/li>\n<\/ul>\n

                    With only 0.2 kg<\/strong>, yet it remains perfectly suited to nomadic setups and lightweight frames.<\/p>\n

                    The gearbox is supplied with front and rear threaded metal plugs to protect the optical surfaces from dust during storage and transport.<\/p>\n

                    Robust mechanical connection<\/h3>\n

                    Both ends are threaded M50x1<\/strong>, guaranteeing :<\/p>\n

                      \n
                    • A stable connection<\/li>\n
                    • Excellent mechanical precision<\/li>\n
                    • Limited bending<\/li>\n
                    • Good optical stability<\/li>\n<\/ul>\n

                      This design helps maintain consistent image quality even with modern high-resolution sensors.<\/p>\n

                      Summary table of technical specifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                      Features<\/th>\nValue<\/th>\n<\/tr>\n
                      Compatibility<\/td>\nAskar 60F Flat-Field<\/td>\n<\/tr>\n
                      Reduction factor<\/td>\n0.75\u00d7<\/td>\n<\/tr>\n
                      Resulting focus<\/td>\n311 mm<\/td>\n<\/tr>\n
                      Resulting focal ratio<\/td>\nf\/5.1<\/td>\n<\/tr>\n
                      Optical type<\/td>\nTriplet corrector\/reducer<\/td>\n<\/tr>\n
                      Image circle<\/td>\n44 mm Full Frame<\/td>\n<\/tr>\n
                      Backfocus<\/td>\n55 mm from M48 male thread<\/td>\n<\/tr>\n
                      Main thread<\/td>\nM50x1<\/td>\n<\/tr>\n
                      Compatible adapters<\/td>\nM54x0.75 and M48x0.75<\/td>\n<\/tr>\n
                      Filter compatibility<\/td>\nIntegrated 2\u2033 M48 filter thread<\/td>\n<\/tr>\n
                      Weight<\/td>\n0.2 kg<\/td>\n<\/tr>\n
                      Manufacturing<\/td>\nHigh-precision CNC aluminum<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                      Why choose Askar 60F 0.75\u00d7 Reducer?<\/h3>\n

                      The Askar 60F 0.75\u00d7 Reducer is an excellent complement for astrophotographers wishing to maximize the wide-field capabilities of their Askar 60F.<\/p>\n

                      By transforming the refractor into a fast astrograph at f\/5.1, while retaining excellent Full Frame correction, this reducer greatly improves photographic speed and ease of use.<\/p>\n

                      Its optimized optical design, compact mechanics and perfect compatibility with the 60F make it a particularly interesting accessory for nomadic setups and modern wide-field astrophotography.<\/p>","protected":false},"excerpt":{"rendered":"

                      Askar 60F 0.75\u00d7 Reducer \u2013 R\u00e9ducteur Correcteur Full Frame pour Askar 60F Le Askar 60F 0.75\u00d7 Reducer est un r\u00e9ducteur de focale sp\u00e9cialement con\u00e7u pour la lunette Askar 60F Flat-Field. Compact, l\u00e9ger et performant, cet accessoire transforme l\u2019astrographe en un syst\u00e8me encore plus rapide et plus adapt\u00e9 \u00e0 l\u2019imagerie grand champ du ciel profond. Gr\u00e2ce […]<\/p>\n","protected":false},"featured_media":14982,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[382],"product_cat":[650],"product_tag":[],"class_list":{"0":"post-14981","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-askar","7":"product_cat-rducteurs-correcteurs-ap","9":"first","10":"on_supplier","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/14981","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=14981"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/14982"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=14981"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=14981"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=14981"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=14981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}