{"id":5019,"date":"2025-03-07T08:46:33","date_gmt":"2025-03-07T07:46:33","guid":{"rendered":"https:\/\/deep-space-astronomy.geekworkers.dev\/produit\/reducteur-0-7x-fra600-2\/"},"modified":"2025-06-03T10:28:56","modified_gmt":"2025-06-03T08:28:56","slug":"reducteur-0-7x-fra600-2","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/reducteur-0-7x-fra600-2\/","title":{"rendered":"Gearbox 0.7x FRA600"},"content":{"rendered":"<h3>Askar 3\" F3.9 0.7x Reducer for FRA600 - Optimize your Astrophotography<\/h3>\n<p>Visit <strong>Askar reducer 3 inches F3.9 0.7x<\/strong> is designed specifically for the FRA600 astrograph, optimizing its capabilities for astrophotography and visual observation. Featuring a 4-element optical design, this reducer reduces the focal ratio and increases the field of view, meeting the needs of astrophotographers looking for increased brightness and speed when capturing large-scale celestial objects. This model is compatible with full-frame sensors, ensuring full image coverage without vignetting.<\/p>\n<h3>Askar 3-inch F3.9 0.7x gearbox specifications<\/h3>\n<ul>\n<li><strong>Focal ratio reduction :<\/strong> The 0.7x reduction factor enables the focal ratio of the astrograph to be changed from f\/5.6 to f\/3.9, increasing brightness for shorter exposure times.<\/li>\n<li><strong>Reduced focal length :<\/strong> The focal length is reduced to 420 mm, ideal for deep-sky shots and the observation of large stellar fields.<\/li>\n<li><strong>Lens design :<\/strong> 4-element system optimized for sharp, aberration-free images, maximizing the quality of every shot.<\/li>\n<li><strong>Back focus :<\/strong> The rear focal length is an industry-standard 55 mm, ensuring compatibility with a wide range of astrophotography accessories.<\/li>\n<li><strong>Full-frame compatibility :<\/strong> Designed to work perfectly with full-frame sensors, eliminating vignetting and guaranteeing uniform image quality.<\/li>\n<\/ul>\n<h3>Dimensions and Technical Design<\/h3>\n<ul>\n<li><strong>Outside diameter :<\/strong> 84 mm, offering a stable, solid structure for use with large equipment.<\/li>\n<li><strong>Total length :<\/strong> 76 mm, for compact mounting without cluttering the configuration.<\/li>\n<li><strong>Front thread :<\/strong> M90*1 female, for secure connection to the FRA600 astrograph.<\/li>\n<li><strong>Rear thread :<\/strong> M48*0.75, suitable for 2\" filters for extended astrophotography possibilities and easy filter installation.<\/li>\n<\/ul>\n<h3>Benefits for users<\/h3>\n<p>This reducer is ideal for users looking to optimize their FRA600 astrograph for deep-sky astrophotography. Reduced exposure time and increased field of view enable faster, more effective capture of celestial objects. The integrated M48*0.75 thread facilitates the addition of 2\" filters, making this reducer versatile for a variety of astronomical applications.<\/p>","protected":false},"excerpt":{"rendered":"<p>R\u00e9ducteur Askar 3 pouces F3.9 0.7x pour FRA600 &#8211; Optimisez votre Astrophotographie Le r\u00e9ducteur Askar 3 pouces F3.9 0.7x est con\u00e7u sp\u00e9cifiquement pour l\u2019astrographe FRA600, optimisant ses capacit\u00e9s pour l\u2019astrophotographie et l\u2019observation visuelle. Dot\u00e9 d\u2019une conception optique \u00e0 4 \u00e9l\u00e9ments, ce r\u00e9ducteur r\u00e9duit le rapport focal et augmente le champ de vision, r\u00e9pondant aux besoins [&hellip;]<\/p>\n","protected":false},"featured_media":5276,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[382],"product_cat":[19,650,575],"product_tag":[],"class_list":["post-5019","product","type-product","status-publish","has-post-thumbnail","product_brand-askar","product_cat-accessoires","product_cat-rducteurs-correcteurs-ap","product_cat-astrophotographie","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/5019","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=5019"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/5276"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=5019"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=5019"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=5019"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=5019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}