Orion 203mm f/4.9 Reflector Telescope Optical Tube Assembly
Item #09788e
4.6 / 5.0
€ 279.99
This Orion 203mm Reflector optical tube is perfect for those intermediate observers who already own an equatorial mount. Use the included camera adapter and attach this to your favorite DSLR or CCD camera to begin your astrophotography journey.
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  • More Info
    • 203mm (8") aperture and 1000mm focal length f/4.9 reflector telescope optical tube for eye-popping views of deep sky and solar system objects alike
    • Also works well as an astrophotography telescope for shooting wide-field subjects
    • Features a 2" Crayford focuser with a step-down adapter for use of both 2" and 1.25" eyepieces and accessories
    • Reflector optical tube weighs 16.5 lbs.
    • Includes dust caps for telescope front aperture and focuser, camera adapter, collimation cap, dovetail finder scope base, and Starry Night astronomy software download card - tube rings and other accessories sold separately

    Responding to your requests, we are pleased to offer the Orion 203mm F/4.9 Reflector Telescope Optical Tube assembly (OTA) for folks who already have an equatorial mount. This optical tube assembly includes parabolic mirror optics, center marked for easy collimation. It has an upgraded 2" Crayford-style focuser (with 1.25" eyepiece adapter), quick-collimation cap, dust cap, and a dovetail base that accommodates any Orion finder scope. Pre-tapped holes in the rear cell allow attachment of an Orion Cooling Accelerator Fan (sold separately). Aperture: 203mm. Focal length: 1000mm (f/4.9). 2" collimatable Crayford-style focuser. The 203mm F/4.9 Reflector Telescope Optical Tube is recommended for visual use or astrophotography. Includes camera adapter. Weighs 16.5 lbs. Tube rings, tube ring mounting plate, finder scope, and telescope eyepieces sold separately.


    Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at sales-eu@telescope.com

    Product Support

    Visit our product support section for instruction manuals and more

  • Specs
    • Best for viewing:
      Brighter deep sky
    • Best for imaging:
      Deep sky
    • User level:
    • Optical design:
    • Optical diameter:
      203 mm
    • Focal length:
      1000 mm
    • Focal ratio:
    • Optics type:
    • Glass material:
      Soda-lime plate
    • Eyepieces:
    • Resolving power:
      0,57 arc*sec
    • Lowest useful magnification:
      29 x
    • Highest useful magnification:
      300 x
    • Highest theoretical magnification:
      406 x
    • Limiting stellar magnitude:
    • Optical quality:
      Diffraction limited
    • Focuser:
      2" Crayford
    • Secondary mirror obstruction:
      58 mm
    • Secondary mirror obstruction by diameter:
      29 %
    • Secondary mirror obstruction by area:
      8 %
    • Mirror coatings/over-coatings:
      Aluminum & Silicon Dioxide
    • Mount type:
      Optical Tube without Mount
    • Astro-imaging capability:
      Lunar, planetary & long exposure
    • Tube material:
    • Length of optical tube:
      96,5 cm
    • Weight, optical tube:
      7,5 kg
    • Weight, fully assembled:
      7,5 kg
    • Additional included accessories:
      Collimation cap
    • Other features:
      2" focuser with 1 1/4" adapter
    • 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.

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