Orion 10" f/8 Ritchey-Chretien Astrograph Telescope
Item #08266e
€ 2,399.99
Go after even the most elusive and faint deep-sky targets with the Orion 10" f/8.0 Ritchey-Chretien Astrograph. Featuring flat-field, virtually coma-free optics for superb imaging ...
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Go after even the most elusive and faint deep-sky targets with the Orion 10" f/8.0 Ritchey-Chretien Astrograph. Featuring flat-field, virtually coma-free optics for superb imaging performance, the Orion 10" RC boasts a plethora of deluxe features.
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  • More Info
    • 10" (250mm) aperture, f/8 Ritchey-Chretien optical tube optimized for astrophotographic use with APS-C and full-frame (35mm) CCD cameras and DSLRs
    • Features a big 3.3" rotatable dual-speed (10:1) Crayford focuser equipped with a sturdy linear-bearing to provide fine focus adjustment without slippage or flexure with heavy imaging accessories attached
    • Hyperbolic primary and secondary mirrors made of low-expansion quartz glass with enhanced aluminum coatings boast 96% reflectivity for bright imaging performance, and the secondary mirror is precisely center-marked to aid in collimation
    • Features two dovetail finder scope bases and a unique, Orion-exclusive slotted wide-format dovetail bar along the top of the telescope for easy attachment of imaging accessories
    • Three built-in 1.5" cooling fans accelerate cooling of the primary mirror to reach thermal equilibrium quickly
  • Specs
    • Best for viewing:
      Brighter deep sky
    • Best for imaging:
      Deep sky
    • User level:
      Advanced
    • Optical design:
      Ritchey-Chretien
    • Optical diameter:
      250 mm
    • Focal length:
      2000 mm
    • Focal ratio:
      f/8,0
    • Optics type:
      Hyperbolic
    • Eyepieces:
      None
    • Resolving power:
      0,46 arc*sec
    • Lowest useful magnification:
      36 x
    • Highest useful magnification:
      295 x
    • Highest theoretical magnification:
      500 x
    • Limiting stellar magnitude:
      14,7
    • Optical quality:
      Diffraction limited
    • Finder scope:
      None
    • Focuser:
      3" dual-speed linear bearing Crayford
    • Secondary mirror obstruction:
      110 mm
    • Secondary mirror obstruction by diameter:
      43 %
    • Secondary mirror obstruction by area:
      19 %
    • Mount type:
      Optical Tube without Mount
    • Astro-imaging capability:
      Lunar, planetary & long exposure
    • Tube material:
      Steel
    • Length of optical tube:
      72,1 cm
    • Weight, optical tube:
      16,0 kg
    • Additional included accessories:
      Three built-in cooling fans, with battery holder, 1.25" compression ring adapter, 1" & 2" Extension tubes
    • Other features:
      Losmandy-style dovetail mounting bar on underside, Custom Losmandy-style guidescope mounting bar, Two dovetail finderscope bases
    • Warranty:
      One year
  • Shipping Info

    Orders received by 5pm UTC for in-stock items ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

    A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

    Economy Delivery (3-5 business days): €0,00
    Expedited Delivery (1-2 business days): €89,00