{"id":16285,"date":"2025-07-23T06:14:38","date_gmt":"2025-07-23T04:14:38","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=16285"},"modified":"2026-07-18T11:53:45","modified_gmt":"2026-07-18T09:53:45","slug":"apochromatic-telescope-203mm-f-4-astrograph-for-astrophotography","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/apochromatische-telescoop-203mm-f-4-astrograph-voor-astrofotografie\/","title":{"rendered":"Apochromatic telescope 203mm f\/4 astrograph for astrophotography"},"content":{"rendered":"

Apochromatic telescope 203mm f\/4 astrograph for astrophotography<\/strong> is a powerful, bright telescope for deep-sky photographers who want fast results. With a fast f\/4 ratio and a parabolic main mirror with 94% reflectance, this astrograph captures faint nebulae and galaxies with short exposure times - without sacrificing detail or sharpness.<\/p>\n\n\n\n

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The 8-inch aperture offers ample light-gathering for high-res astrophotography, while the compact design (only 71 cm tube length) works surprisingly well on an EQ5 or similar mount. This model combines brute optical power with practical portability.<\/p>\n\n\n\n

\u2713 Parabolic BK7 main mirror (94% reflection) for clear, high-contrast image
\u2713 f\/4 aperture ratio - shorter exposure, wider fields
\u2713 Large 70 mm capture mirror - full exposure for DSLR and CMOS cameras
\u2713 2\" Crayford focuser with 1:10 micro-reduction \u2013 suitable for heavy accessories
\u2713 12V fan for faster cooling of the main mirror<\/p>\n\n\n\n

This astrograph is ideal for astrophotographers who want to capture vast objects, such as the Orion Nebula, California Nebula or Andromeda Galaxy - in relatively short sessions. Its wide angle of view and tolerance for small tracking errors make it particularly forgiving for novice photographers with guiding.<\/p>\n\n\n\n

Observation goals<\/strong><\/h3>\n\n\n\n
    \n
  • Deep-sky photography (nebulae, galaxy fields, galaxies)<\/li>\n\n\n\n
  • Widescreen astrophotography with DSLR or dedicated astrocam<\/li>\n\n\n\n
  • Fast set-ups without a heavy mount<\/li>\n\n\n\n
  • Visual use with 2\" wide-field eyepieces (optional)<\/li>\n<\/ul>\n\n\n\n

    What you can see with it<\/strong><\/h3>\n\n\n\n

    \u2713 Faint emission nebulae such as the Veil Nebula or IC 1805
    \u2713 Structure in spiral arms of galaxies (M33, M101)
    \u2713 Bright globular clusters (M13) and open clusters (NGC 869\/884)
    \u2713 Wide-field images without vignetting (when using coma corrector)
    \u2713 Moon and planets at high magnification - with sharp edge details<\/p>\n\n\n\n

    Filters \/ Properties<\/strong><\/h3>\n\n\n\n
      \n
    • Telescope type<\/strong>: Reflector<\/li>\n\n\n\n
    • Optics<\/strong>: Newton (parabolic)<\/li>\n\n\n\n
    • Lens diameter<\/strong>: 203 mm<\/li>\n\n\n\n
    • Focal length<\/strong>: 800 mm<\/li>\n\n\n\n
    • Opening ratio<\/strong>: f\/4<\/li>\n\n\n\n
    • Focuser<\/strong>Crayford 2\", 1:10 microfocuser<\/li>\n\n\n\n
    • Camera connection<\/strong>2\" to 1.25\" adapter<\/li>\n\n\n\n
    • Use Type<\/strong>: Astrophotography \/ visual widescreen<\/li>\n\n\n\n
    • Tripod connector<\/strong>: Vixen-style dovetail<\/li>\n\n\n\n
    • Suitable for beginners<\/strong>: \u2717<\/li>\n\n\n\n
    • Suitable for advanced users<\/strong>: \u2713<\/li>\n\n\n\n
    • Suitable for observatories<\/strong>: \u2717<\/li>\n<\/ul>\n\n\n\n

      Technical specifications<\/strong><\/h3>\n\n\n\n
        \n
      • Main mirror: parabolic BK7<\/li>\n\n\n\n
      • Reflective coating: 94% aluminum + SiO\u2082<\/li>\n\n\n\n
      • Front mirror: 70 mm (35% obstruction)<\/li>\n\n\n\n
      • Mirror ventilation: 12V active<\/li>\n\n\n\n
      • Tube length: 710 mm<\/li>\n\n\n\n
      • Tube diameter: 230 mm<\/li>\n\n\n\n
      • Tube weight: 8.6 kg<\/li>\n\n\n\n
      • Material: steel<\/li>\n\n\n\n
      • Includes: tube rings, Vixen dovetail (22 cm), 2\" extension tube (35 mm), fan, 1.25\"\/2\" adapter<\/li>\n\n\n\n
      • Mounting: OTA-only (no mount included)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

        Apochromatic telescope 203mm f\/4 astrograph for astrophotography<\/strong> \u2013 8\" Newton with high light output, ventilated mirror, Crayford focuser, and large secondary mirror for full-frame photography.<\/p>","protected":false},"featured_media":22156,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[567,428,531,3175,51],"product_tag":[],"class_list":["post-16285","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-refractor-telescopen","product_cat-telescopen-voor-astrofotografie","product_cat-gevorderd","product_cat-refractor-ota","product_cat-telescopen","product_shipping_class-licht","first","outofstock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"outofstock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":16294,"url":"https:\/\/www.telescoop.nl\/en\/omegon-304-1216-newton-astrograph-astrofotografie\/","url_meta":{"origin":16285,"position":0},"title":"Omegon 304\/1216 Newton Advanced VX GoTo","author":"Info telescoop","date":"23-07-2025","format":false,"excerpt":"Apochromatische telescoop 304mm f\/4 astrograph voor astrofotografie met 12\" parabolische spiegel, 94% reflectie, hoofdspiegelventilatie en 2\" Crayford focuser \u2013 voor serieuze deep-sky sessies.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Apochromatisches Teleskop 304mm f\/4 Astrograph f\u00fcr Astrofotografie","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Telescoop-Pro-Astrograph-304-1200-OTA.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Telescoop-Pro-Astrograph-304-1200-OTA.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Telescoop-Pro-Astrograph-304-1200-OTA.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Telescoop-Pro-Astrograph-304-1200-OTA.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Telescoop-Pro-Astrograph-304-1200-OTA.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Telescoop-Pro-Astrograph-304-1200-OTA.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":33917,"url":"https:\/\/www.telescoop.nl\/en\/william-optics-pleiades-68-260-apo-astrograph-ota\/","url_meta":{"origin":16285,"position":1},"title":"William Optics Pleiades 68\/260 APO Astrograph OTA","author":"","date":"15-11-2025","format":false,"excerpt":"William Optics Pleiades 68: zevenelements FPL-53 astrograaf 68\/260 f\/3,8 met ge\u00efntegreerde corrector en vlak full-frame beeld. 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