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Orion - 254mm f/4.7 Reflector Telescope Optical Tube Assembly


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Availability: Available - Ships in 3-5 Days


Available - Ships in 3-5 Days

Manufactured by: Orion


Responding to your requests, we are pleased to offer the Orioin 254mm f/4.7 Reflector Telescope Optical Tube assembly (OTA) for folks who already have an equatorial mount. This optical tube assembly includes parabolic mirror optics, upgraded 2" Crayford-style focuser, telescope eyepiece holder, quick-collimation cap, dust cap, and dovetail base for finder scope. Aperture: 254mm (10.0"). Focal length: 1200mm (f/4.7). Has a 2" Crayford-style focuser with 2" and 1.25" telescope eyepiece holders. Recommended for visual use or astrophotography. Includes prime-focus camera adapter. Weighs 27.2 lbs. Tube rings, tube ring mounting plate, finder scope, and eyepieces sold separately.

  • 254mm (10") aperture and 1200mm focal length reflector telescope optical tube provides vivid, close views of deep-sky and solar system objects
  • Includes 2" Crayford focuser for smooth, backlash-free focus adjustment
  • Recommended for visual or astrophotographic use
  • Weighs 27.2 pounds
  • Optical tube only, does not include tube rings, mount, or tripod - which can be purchased separately






Additional Information

Name Orion - 254mm f/4.7 Reflector Telescope Optical Tube Assembly
Manufacturer Orion
Model ORI-09959
Manufacturer Part No ORI-09959
Telescope Aperture 8.1" - 10"
Focal Length 1200mm
Focal Ratio f/4.7
Focuser 2" Crayford
Highest Useful Magnification 300x
Included Accessories Collimation cap
Limiting Stellar Magnitude 14.7
Lowest Useful Magnification 34x
Optical Tube Steel
Optical Tube Length 47.2 in.
Optical Tube Weight 27.2 lbs.
Secondary Mirror Obstruction 63mm
Secondary Mirror Obstruction by Area 6%
Secondary Mirror Obstruction by Diameter 25%