Orion

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Item Includes Description Features Specifications

Orion 254mm f/4.7 Reflector Telescope Optical Tube with 2" Crayford-Style Focuser & Software

Mfr. Part: 09959     SKU: ON254OTC

Orion 254mm f/4.7 Reflector Telescope Optical Tube with 2" Crayford-Style Focuser & Software
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Due to Manufacturer Restrictions, This Item can NOT be Shipped to California.

Item Includes
Orion 10" Optical Tube Assembly - 2" to 1.25" Eyepiece Adapter - Camera Adapter - Collimation Cap - Dovetail Finder Scope Base - Dust Cap - Starry Night Special Edition Software - Orion 1 Year Limited Warranty

Description
The Orion 254mm f/4.7 Reflector Telescope Optical Tube has 254mm aperture and 1200mm focal length for vivid, close views of deep-sky and solar system objects. It includes upgraded 2" Crayford-style focuser.

Features
Does not include mount or tripod

Specifications
UseAstronomy
User levelAdvanced
Optical designReflector
Optical diameter254mm, 10"
Focal length1200mm
Focal ratiof/4.7
Optics typeParabolic
Glass materialBK-7
Eyepieces includedNo
Resolving power0.46arc sec
Lowest useful magnification34x
Highest useful magnification300x
Limiting stellar magnitude14.7
Optical qualityDiffraction limited
Focuser2" Crayford
Secondary mirror obstruction63mm
Secondary mirror obstruction25% by diameter
Secondary mirror obstruction by area6%
Mirror coatings/over-coatingsAluminum & Silicon Dioxide
Mount styleOptical Tube without Mount
Astro-imaging capabilityLunar, planetary & long exposure
Tube materialSteel
Additional included accessoriesCollimation cap
Other features2" crayford focuser with 1.25" adapter
Length of optical tube47.2 in
Weight, optical tube27.2 lbs
WarrantyOrion 1 year limited warranty