Celestron 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.
Optical Design
Refractor
Aperture (mm)
120 mm (4.72 in)
Focal Length
1000 mm (39 in)
Formula:Focal Ratio
8.33
Focal Length of Eyepiece 1 (mm)
25 mm (0.98 in)
Formula:Magnification of Eyepiece 1
40 x
Finderscope
6x30
Mount Type
Omni CG-4 Equatorial
Tripod Leg Diameter
1.75" Stainless
Formula:Highest Useful Magnification
283 x
Formula:Lowest Useful Magnification
17 x
Formula:Limiting Stellar Magnitude
12.9
Formula:Resolution (Rayleigh)
1.16 arc seconds
Formula:Resolution (Dawes)
0.97 arc seconds
Formula: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
Weight of Counterweights
7 lbs (3.2 kg) and 4 lbs (1.8 kg)
Warranty
2-year Telescope Warranty