celestron-21090-omni-xlt-120-refractor-telescope

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Celestron - 21090 - Omni XLT 120 Refractor Telescope

Code: R42UG

  • 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

Product details

Celestron - 21090 - Omni XLT 120 Refractor Telescope

• 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


Omni XLT series features the stable platform of the CG-4 mount and high quality optics. Using aspheric shaping technology in conjunction with hand-figuring the optics, the Omni XLT presents an image with virtually no spherical aberration. We also added our famous StarBright XLT coating system to further enhance light transmission.

Specification table
Optical Design Refractor
Aperture (mm) 120 mm (4.72 in)
Focal Length 1000 mm (39 in)
Focal Ratio 8.33
Focal Length of Eyepiece 1 (mm) 25 mm (0.98 in)
Magnification of Eyepiece 1 40 x
Finderscope 6x30
Mount Type Omni CG-4 Equatorial
Tripod Leg Diameter 1.75" Stainless
Highest Useful Magnification 283 x
Lowest Useful Magnification 17 x
Limiting Stellar Magnitude 12.9
Resolution (Rayleigh) 1.16 arc seconds
Resolution (Dawes) 0.97 arc seconds
Light Gathering Power (Compared to human eye) 294 x
Apparent Field of View 1.25 °
Linear Field of View (@1000 yds) 66 ft (20 m)
Optical Coatings StarBright XLT
Optical Tube Length 40 in (1016 mm)
Optical Tube Weight 12.5 lbs (5.67 kg)
Tripod Weight 12.5 lbs (5.67 kg)
Weight of Counterweights 7 lbs (3.2 kg) and 4 lbs (1.8 kg)
Warranty 2-year Telescope Warranty

Bulk Prices

Item code Item name Quantity Price
R42UG Celestron - 21090 - Omni XLT 120 Refractor Telescope (1+) £506.99

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£506.99

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