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Orion Telescopes

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Intermediate
*2nd* Orion SkyQuest XT8i IntelliScope Dobsonian Telescope
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Item #  87183
  • Best for viewing
    Brighter deep sky
  • Best for imaging
    Lunar & planetary
  • User level
    Intermediate
  • Optical design
    Reflector
  • Optical diameter
    203mm
  • Finder scope lens diameter
    50mm
  • Focal length
    1200mm
  • Focal ratio
    f/5.9
  • Optics type
    Parabolic
  • Glass material
    Soda-lime plate
  • Eyepieces
    Sirius Plossl 25.0mm,10.0mm (1.25")
  • Magnification with included eyepieces
    48x, 120x
  • Resolving power
    0.57arc*sec
  • Lowest useful magnification
    29x
  • Highest useful magnification
    300x
  • Highest theoretical magnification
    406x
  • Limiting stellar magnitude
    14.2
  • Optical quality
    Diffraction limited
  • Finder scope
    9x50 Correct-image, right angle
  • Focuser
    2" Crayford
  • Secondary mirror obstruction
    47mm
  • Secondary mirror obstruction by diameter
    23%
  • Secondary mirror obstruction by area
    5%
  • Mirror coatings/over-coatings
    Aluminum & Silicon Dioxide
  • Mount type
    Dobsonian
  • Astro-imaging capability
    Simple moon shots
  • Computerized compatibility
    Intelliscope included
  • Alignment procedure
    2-Star Alignment
  • Number of objects in database
    14,000+
  • Bearing material
    PTFE and UHMW bearings
  • Power requirement
    9-volt battery
  • Available ports
    RS-232
  • Tube material
    Steel
  • Tripod material
    Wood
  • Length of optical tube
    44.5 in.
  • Weight, optical tube
    20.3 lbs.
  • Weight, mount/tripod
    21.3 lbs.
  • Weight, fully assembled
    41.6 lbs.
  • Additional included accessories
    Other included items are not always the same between a new and a second. Seconds may be older versions of the new product, or may be customer returns where accessory substitutions have been made.
  • Other features
    2nds are covered by Orion's Satisfaction Guarantee
  • Warranty
    One year

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