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Orion Telescopes

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Beginner
*2nd* Orion Apex 102mm Maksutov-Cassegrain Telescope
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This product is no longer available for purchase.
  • Compact Maksutov-Cassegrain telescope provides great views during day or night
  • 102mm (4") aperture and 1300mm focal length telescope provides fantastic celestial views of the Moon, planets, and bright deep-sky objects, as well as terrestrial views of wildlife and scenery
  • A telescope small enough to store on a bookshelf but with the power of traditional scopes five times its size!
  • Includes a 25mm Sirius Plossl 1.25" eyepiece, 6x26 correct-image finder scope, 45-degree correct-image diagonal, soft carry case, Starry Night software, and more!
  • Does not include tripod or mount - either can be purchased separately


Item #  79823
  • Best for viewing
    Lunar & planetary
  • Best for imaging
    Lunar & planetary
  • User level
    Beginner
  • Optical design
    Maksutov-Cassegrain
  • Optical diameter
    102mm
  • Finder scope lens diameter
    26mm
  • Focal length
    1300mm
  • Focal ratio
    f/12.7
  • Eyepieces
    Sirius Plossl 25.0mm (1.25")
  • Magnification with included eyepieces
    52x
  • Resolving power
    1.13arc*sec
  • Lowest useful magnification
    15x
  • Highest useful magnification
    204x
  • Highest theoretical magnification
    204x
  • Limiting stellar magnitude
    12.7
  • Optical quality
    Diffraction limited
  • Finder scope
    6x26 Correct-image
  • Focuser
    Internal
  • Diagonal degrees
    1.25" 45° Prism Correct-image
  • Secondary mirror obstruction
    31mm
  • Secondary mirror obstruction by diameter
    34%
  • Secondary mirror obstruction by area
    12%
  • Mirror coatings/over-coatings
    Aluminum & Silicon Dioxide
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar & planetary
  • Tube material
    Aluminum
  • Length of optical tube
    11.0 in.
  • Weight, optical tube
    5.0 lbs.
  • Weight, fully assembled
    5.0 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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