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Orion 203mm f/4.9 Reflector Telescope Optical Tube with Crayford-Style Focuser & Software

SKU: ON203OTC MFR: 09788
Due to Manufacturer Restrictions, This Item can NOT be Shipped to California.
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About the Orion 203 Reflector

The Orion 203mm F/4.9 Reflector Telescope Optical Tube features 203mm aperture and 1000mm focal length for eye-popping views of deep sky and solar system objects. It does not include mount or tripod but includes an upgraded Crayford-style focuser.

Orion 203 Reflector Includes

  • Orion 8" Optical Tube Assembly
  • 2"
  • 1.25" Eyepiece Adapter
  • Crayford-Style Focuser
  • Camera Adapter
  • Collimation Cap
  • Dovetail Finder Scope Base
  • Dust Cap
  • Starry Night Special Edition Software
  • Orion 1 Year Limited Warranty

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Orion 203 Reflector Features

  • Includes an upgraded Crayford-style focuser
  • Includes low profile 2" camera adapter
  • Includes Starry Night astronomy software

Orion 203 Reflector Specifications

Use Astronomy
User level Intermediate
Optical design Reflector
Optical diameter 203mm, 8"
Focal length 1000mm
Focal ratio f/4.9
Optics type Parabolic
Glass material Soda-lime plate
Eyepieces included No
Resolving power 0.57arc sec
Lowest useful magnification 29x
Highest useful magnification 300x
Limiting stellar magnitude 14.2
Optical quality Diffraction limited
Focuser 2" Crayford
Secondary mirror obstruction 58mm
Secondary mirror obstruction 29% by diameter
Secondary mirror obstruction by area 8%
Mirror coatings/over-coatings Aluminum & Silicon Dioxide
Mount style Optical Tube without Mount
Astro-imaging capability Lunar, planetary & long exposure
Tube material Steel
Additional included accessories Collimation cap
Other features 2" focuser with 1 1/4" adapter
Length of optical tube 38.0 in
Weight, optical tube 16.5 lbs
Warranty Orion 1 year limited warranty
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