{"id":10990,"date":"2025-09-25T15:34:18","date_gmt":"2025-09-25T13:34:18","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=10990"},"modified":"2025-11-18T17:37:00","modified_gmt":"2025-11-18T16:37:00","slug":"ritchey-chretien-ts-optics-gso-8","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/ritchey-chretien-ts-optics-gso-8\/","title":{"rendered":"Ritchey-Chr\u00e9tien TS-Optics GSO 8\u2033"},"content":{"rendered":"

TS-Optics GSO 8\u2033 RC Pro 203\/1624 - The benchmark Ritchey-Chr\u00e9tien astrograph<\/h3>\n

Visit Ritchey-Chr\u00e9tien TS-Optics GSO 8\u2033 RC (203 mm, 1624 mm, f\/8)<\/strong> is designed for high-resolution astrophotography, but is also perfectly suited to visual observation. With its hyperbolic quartz mirrors (fused silica<\/em>) with 94 % reflectivity and its ventilated open tube, it guarantees stable focus, bright images and fine stars across the entire field.<\/p>\n

Highlights<\/h3>\n
    \n
  • Genuine Ritchey-Chr\u00e9tien<\/strong> naturally corrected, coma-free field.<\/li>\n
  • Quartz mirrors<\/strong> focus stability even at varying temperatures.<\/li>\n
  • Reflectivity 94 %<\/strong> direct gain in brightness and contrast.<\/li>\n
  • Open tube + ventilation<\/strong> rapid cooling, better contrast.<\/li>\n
  • Generous backfocus (\u2248159 mm)<\/strong> ideal for correctors, gearboxes, OAGs and filter wheels.<\/li>\n
  • No shifting<\/strong> : primary fixed, developed by focuser Monorail 2\u2033<\/em>.<\/li>\n
  • Two Vixen bars<\/strong> simple mounting of guidescope or piggyback camera.<\/li>\n<\/ul>\n

    Astrophotography<\/h3>\n

    The 8\u2033 RC delivers sharper, brighter astrophotos<\/strong> than comparable SCT or Maksutov sensors. Without correctors, sensors up to APS-C<\/strong> are perfectly usable. For full format, an RC corrector is recommended. With the CCD47 reducer 0.67\u00d7<\/strong>the focal length increases from 1624 mm to \u22481088 mm and the f\/8 ratio to f\/5,36<\/strong>which means twice as fast installation times.<\/p>\n

    The Monorail 2\u2033 focuser<\/h3>\n

    More rigid than a classic Crayford, the Monorail 2\u2033<\/strong> combines fluidity and stability: solid stainless steel slide, no tilt when locked, 360\u00b0 rotation for framing, 1:10 gear ratio for precise focusing, graduation for easy focus retrieval, motorization compatibility.<\/p>\n

    Why RC rather than SCT?<\/h3>\n
      \n
    • No Schmidt blade<\/strong> less susceptible to fogging, maximum transmission (including IR).<\/li>\n
    • Design-corrected field<\/strong> Fine stars in the center and on the edges.<\/li>\n
    • No residual aberration<\/strong> no permanent corrector in the optical path.<\/li>\n
    • No mirror shift<\/strong> : fixed primary \u2192 maximum stability in long exposure imaging.<\/li>\n<\/ul>\n

      Technical specifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Optical design<\/strong><\/td>\nRitchey-Chr\u00e9tien (hyperbolic mirrors)<\/td>\n<\/tr>\n
      Opening<\/strong><\/td>\n203 mm (8\u2033)<\/td>\n<\/tr>\n
      Focal length<\/strong><\/td>\n1624 mm<\/td>\n<\/tr>\n
      Ratio f\/<\/strong><\/td>\nf\/8 (\u2248 f\/5.36 with reducer 0.67\u00d7)<\/td>\n<\/tr>\n
      Theoretical resolution<\/strong><\/td>\n0,58\u2033<\/td>\n<\/tr>\n
      Mirrors<\/strong><\/td>\nQuartz, reflectivity 94 %<\/td>\n<\/tr>\n
      Backfocus<\/strong><\/td>\n\u2248254 mm from back of tube \/ 159 mm from 2\u2033 runner<\/td>\n<\/tr>\n
      Secondary obstruction<\/strong><\/td>\n85 mm<\/td>\n<\/tr>\n
      Focuser<\/strong><\/td>\n2\u2033 double-speed monorail + 1.25\u2033 adapter<\/td>\n<\/tr>\n
      Connection thread<\/strong><\/td>\nM90\u00d71<\/td>\n<\/tr>\n
      Dovetail<\/strong><\/td>\n2 x 395 mm Vixen bars (GP)<\/td>\n<\/tr>\n
      Tube diameter<\/strong><\/td>\n230 mm<\/td>\n<\/tr>\n
      Tube length<\/strong><\/td>\n580 mm (with focuser)<\/td>\n<\/tr>\n
      Weight<\/strong><\/td>\n\u22488.25 kg (+0.5 kg extension rings)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      In the box<\/h3>\n
        \n
      • RC 8\u2033 f\/8 telescope (203\/1624)<\/li>\n
      • Focuser Monorail 2\u2033 (with 1.25\u2033 adapter)<\/li>\n
      • Two Vixen-style dovetail bars (GP)<\/li>\n
      • M90 extension rings<\/li>\n
      • Protective cap<\/li>\n<\/ul>\n

        In a nutshell<\/h3>\n

        Visit TS-Optics GSO 8\u2033 RC Pro<\/strong> is a high-end, affordable solution for astrophotographers looking for a stable, bright, full-field corrected instrument. With its optional accessories (corrector, reducer, OAG, filter wheel), it can easily be upgraded to advanced, high-quality setups.<\/p>","protected":false},"excerpt":{"rendered":"

        TS-Optics GSO 8″ RC Pro 203\/1624 \u2013 L\u2019astrographe Ritchey-Chr\u00e9tien de r\u00e9f\u00e9rence Le Ritchey-Chr\u00e9tien TS-Optics GSO 8″\u00a0RC (203 mm, 1624 mm, f\/8) est con\u00e7u pour l\u2019astrophotographie haute r\u00e9solution, mais reste parfaitement adapt\u00e9 \u00e0 l\u2019observation visuelle. Avec ses miroirs hyperboliques en quartz (fused silica) \u00e0 94 % de r\u00e9flectivit\u00e9 et son tube ouvert ventil\u00e9, il garantit une […]<\/p>\n","protected":false},"featured_media":10992,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[842],"product_cat":[392,750],"product_tag":[],"class_list":{"0":"post-10990","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-ts-optics","7":"product_cat-telescopes_reflecteurs","8":"product_cat-ritchey-chretien","10":"first","11":"on_supplier","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/10990","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=10990"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/10992"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=10990"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=10990"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=10990"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=10990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}