Celestron Omni XLT 120

Celestron Omni XLT 120

Please Contact Us✓ 2 year warranty

About this product

Model:  Comni120
Part Number:  21090

The Omni XLT 120 f8.3 refractor features the stable CG-4 mount and high quality aspheric optics.

Celestron have also added their high-quality StarBright XLT coating system to further enhance light transmission.








  • High quality optics start with each lens and(or) mirror being hand selected so only the finest grade of optical glass is used
  • StarBright XLT coatings provide maximized light transmission
  • 25 mm multi-coated eyepiece - 20 mm eye relief, 50° FOV
  • 1.25" star diagonal
  • CG-4 German Equatorial mount with setting circles and slow motion controls - to accurately locate and track sky objects
  • Ball bearings in both axis of the mount for smooth performance
  • Heavy-duty pre-assembled stainless steel tripod featuring 1.75" legs, accessory tray and bubble level
  • Easy no-tool setup

What's in the box

  • Telescope OTA
  • CG-4 Mount & Tripod
  • Counterweights
  • Finderscope
  • 25mm Eyepiece


Optical DesignRefractor
Aperture (mm)120 mm (4.72 in)
Focal Length1000 mm (39 in)
Focal Ratio8.33
Focal Length of Eyepiece 1 (mm)25 mm (0.98 in)
Magnification of Eyepiece 140 x
Mount TypeOmni CG-4 Equatorial
Tripod Leg Diameter1.75" Stainless
Highest Useful Magnification283 x
Lowest Useful Magnification17 x
Limiting Stellar Magnitude12.9
Resolution (Rayleigh)1.16 arc seconds
Resolution (Dawes)0.97 arc seconds
Light Gathering Power (Compared to human eye)294 x
Apparent Field of View1.25
Linear Field of View (@1000 yds)66 ft (20 m)
Optical CoatingsStarBright XLT
Optical Tube Length40 in (1016 mm)
Optical Tube Weight12.5 lbs (5.67 kg)
Tripod Weight12.5 lbs (5.67 kg)
Weight of Counterweights7 lbs (3.2 kg) and 4 lbs (1.8 kg)
Warranty2-year Telescope Warranty

Downloads / Manuals

The following manuals and downloads are available for this product:


Omni XLT Manual (PDF)

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