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Celestron C6-A-XLT (CG-5) Optical Tube Assembly
Celestron C6-A-XLT (CG-5) Optical Tube Assembly

Celestron C6-A-XLT (CG-5) Optical Tube Assembly

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Your Price: CAD $815.75
Retail Price:CAD $835.05

Your Savings:CAD $19.30(2%)

Usually ships in 5-7 business days
Part Number:91010-XLT

Choose Options or Accessories if Applicable

Imaging Cameras/Autoguider
Camera Adapters and Imaging Accessories
Barlow Lenses
Quick Overview
  • 6" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 1500 mm focal length (f/10)
  • 25 mm eyepiece included (60x)
  • Visual back allows for use with 1.25" accessories
  • 6x30 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Includes dovetail rail compatible with CG-5 Advanced Series mount

Now you can have your own a la carte assemblage of your preferred optical tube and mount.  All Celestron Schmidt-Cassegrain telescopes utilize the multicoated Starbright® coatings group.  Highly reflective coatings are used on the mirrors, with anti-reflective coatings employed on the correcting lens for increases in light transmission.

Celestron's optical systems internal baffling ensures the highest contrast levels.  To maintain the company's mindset as well as to provide consistently high performance and customer satisfaction, all Celestron Schmidt-Cassegrain optical assemblies utilize the same superior optics regardless of their size or configuration.

The StarBright XLT coatings are all that distinguish this offering from the ordinary 8" optical tube assembly.  These coatings dramatically decrease the total percentage of light loss incurred by the scope's system of lenses & mirrors by a measure of 43%!  Light is invariably lost as it passes through lenses or is reflected from mirrors, and this can have a particularly dramatic effect of deep space objects.  StarBright XLT coatings are a highly intensive process which diminishes this effect and brings the faintest things your scope can resolve into greater detail.  They'll bring the details of bigger apertures without adding to the weight of your rig.

Optical Design
Aperture (mm)
150 mm (5.91 in)
Focal Length (mm)
1500 mm (59 in)
Focal Ratio
Eyepiece 1 (mm)
25 mm (0.98 in)
Magnification 1
60 x
Star Diagonal
Optical Tube
Aluminum - black
Fastar Compatible
Highest Useful Magnification
354 x
Lowest Useful Magnification
21 x
Limiting Stellar Magnitude
Resolution (Rayleigh)
0.93 arc seconds
Resolution (Dawes)
0.77 arc seconds
Light Gathering Power (Compared to human eye)
459 x
Angular Field of View (deg)
.83 °
Linear Field of View (@1000 yds)
44 ft (13 m)
Secondary Mirror Obstruction
2.2 in (56 mm)
Secondary Mirror Obstruction by Diameter
37 %
Secondary Mirror Obstruction by Area
14 %
Optical Coatings
StarBright XLT
Optical Tube Length
16 in (406 mm)
Optical Tube Weight
10 lbs (4.54 kg)
Dovetail Compatibility
CG-5 Mount

What's in the Box:
Celestron C6-A (XLT) 6"/152mm Aluminum Catadioptric Telescope Optical Tube Assembly (1500mm f/10) for the CG-5 Mount with StarBright XLT Coatings
  • 25mm (60x) Plossl Eyepiece (1.25")
  • 6x30mm Finderscope
  • 1.25" Star Diagonal
  • Dovetail Slide Bar
  • 2-Year Warranty

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