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Orion - 80mm f/11.4 Refractor Telescope Optical Tube


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Availability: Available



Manufactured by: Orion


  • Ideal for use as a guide scope
  • Guiding enables long exposure astrophotography
  • 1.25" focuser
  • One-year limited warranty

This quality Orion 80mm F/11.4 Refractor Telescope Optical Tube makes the perfect guide scope for doing long-exposure astrophotography. The 80mm-diameter air-spaced achromatic lens has a focal length of 910mm (f/11.4) and provides plenty of light collection for targeting faint guide stars. Multicoatings keep light loss from reflection to a minimum. The rack-and-pinion focuser (1.25") is made of aluminum and features a focus lock knob. The aluminum telescope optical tube is finished in glass black enamel and has an aluminum dew/glare shield. Six internal baffles prevent internal glare and provide great image contrast. No finder scope, diagonal, telescope eyepiece, or guide scope rings are included.

Use Astronomy
User level Advanced
Optical design Refractor
Optical diameter 80mm
Focal length 910mm
Focal ratio f/11.4
Coatings Multi-coated
Optics type Air-spaced doublet
Glass material Crown/Flint
Eyepieces included None
Resolving power 1.45arc-sec
Lowest useful magnification 12x
Highest useful magnification 160x
Limiting stellar magnitude 12.2
Optical quality Diffraction limited
Focuser 1.25" Rack-and-pinion
Mount style Optical Tube without Mount
Tube material Aluminum
Length of optical tube 34.7 in.
Weight, optical tube 4.5 lbs.
Warranty One year

Included Items:
Optical tube assembly
Dust cap
Starry Night special edition software

Additional Information

Name Orion - 80mm f/11.4 Refractor Telescope Optical Tube
Manufacturer Orion
Model ORI-07380
Manufacturer Part No ORI-07380
Telescope Aperture 3.1" - 4"