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 130 of 143 
Orion Telescopes
Orion ShortTube 80 Refractor Telescope Optical Tube Assembly
$129.99
 
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In Stock
  • Compact, fast f/5 refractor optical tube assembly excels for use as a guide scope, or for wide-field observations
  • Coupled with an autoguider camera (sold separately), the ST80 OTA makes guide star acquisition easy and efficient
  • Multi-coated 80mm aperture, 400mm focal length achromatic optics are housed in an all-metal tube
  • Its 1.25" aluminum rack-and-pinion focuser has excellent drawtube rigidity with ZERO flexure. Drawtube collar allows attachment of autoguider camera or accessories via their 1.25" nosepiece with dual thumbscrew lock-down or via direct, ultra-secure T-thread attachment.
  • Sold as optical tube assembly only, without accessories


Item #  09948b
  • Best for viewing
    Brighter deep sky
  • User level
    Beginner
  • Optical design
    Refractor
  • Optical diameter
    80mm
  • Focal length
    400mm
  • Focal ratio
    f/5.0
  • Coatings
    Multi-coated
  • Optics type
    Air-spaced doublet
  • Glass material
    Crown/Flint
  • Eyepieces
    None
  • Resolving power
    1.45arc*sec
  • Lowest useful magnification
    12x
  • Highest useful magnification
    160x
  • Highest theoretical magnification
    160x
  • Limiting stellar magnitude
    12.2
  • Optical quality
    Diffraction limited
  • Finder scope
    None
  • Focuser
    1.25" Rack-and-pinion
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & long exposure
  • Tube material
    Aluminum
  • Length of optical tube
    15.0 in.
  • Weight, optical tube
    2.7 lbs.
  • Other features
    Focus lock knob
  • Warranty
    One year

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

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