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Celestron C8-A XLT (CGE) Optical Tube Assembly
Celestron C8-A XLT (CGE) Optical Tube Assembly

Celestron C8-A XLT (CGE) Optical Tube Assembly

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Your Price: CAD1,836.45
Retail Price:CAD1,928.27

Your Savings:CAD91.82(5%)

Usually ships in 5-7 business days
Part Number:91024-XLT

Choose Options or Accessories if Applicable

Camera Adapters and Imaging Accessories
Imaging Cameras/Autoguider
Barlow Lenses
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Miscellaneous
Power Supplies
18769 Car Battery Adapter (+CAD59.00)
18778 AC Adapter – (computerized except CGEM, CGX) (+CAD59.00)
18774 PowerTank, 12v 7Ah - Compatible Advanced VX, Astro Fi NexStar Evolution NexStar GT, NexStar SLT, NexStar SE Series LCM serie, SkyProdigy (+CAD139.00)
18768 PowerTank Lithium Pro - Compatible Advanced VX, CGX-L Astro Fi CPC, CPC DX CG-5, NexStar Evolution CGE, NexStar GT CGE Pro, NexStar SE Series CGEM II NexStar SLT CGEM, CGEM DX,SkyProdigy LCser (+CAD349.00)
18771 PowerTank Lithium - Compatible Advanced VX, Astro Fi NexStar Evolution NexStar GT NexStar SLT NexStar SE Series LCM series SkyProdigy (+CAD259.00)
18763 PowerTank Lithium LT - Compatible Advanced VX, Astro Fi NexStar Evolution NexStar GT, NexStar SLT, NexStar SE Series LCM series, SkyProdigy (+CAD169.00)
18777 PowerTank 17, 12v 17Ah - Compatible Advanced VX, CGX-L Astro Fi, CPC, CPC DX CG-5 , NexStar Evolution CGE, NexStar GT CGE Pro, NexStar SE Series CGEM II, NexStar SLT CGEM, CGEM DX, SkyProdigy L (+CAD259.00)
18780 AC Adapter - 5 Amp (CGEM, CGE, CGX, CGX-L) (+CAD149.00)
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Quick Overview
  • 8" Schmidt-Cassegrain Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2032 mm focal length (f/10)
  • 25 mm eyepiece included (81x)
  • 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 CGE 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
Schmidt-Cassegrain
Aperture (mm)
203.2 mm (8 in)
Focal Length (mm)
2032 mm (80 in)
Focal Ratio
10
Eyepiece 1 (mm)
25 mm (0.98 in)
Magnification 1
81 x
Finderscope
6x30
Star Diagonal
1.25
Optical Tube
Aluminum
Highest Useful Magnification
480 x
Lowest Useful Magnification
29 x
Limiting Stellar Magnitude
14
Resolution (Rayleigh)
0.69 arc seconds
Resolution (Dawes)
0.57 arc seconds
Light Gathering Power (Compared to human eye)
843 x
Secondary Mirror Obstruction
2.5 in (64 mm)
Secondary Mirror Obstruction by Diameter
31 %
Secondary Mirror Obstruction by Area
9.77 %
Optical Coatings
StarBright XLT
Optical Tube Length
17 in (432 mm)
Optical Tube Weight
12.5 lbs (5.67 kg)
Dovetail Compatibility
CGE Mount

What's in the Box:
Celestron C8-A (XLT) 8"/203mm Aluminum Schmidt-Cassegrain Telescope Optical Tube Assembly (2032mm f/10) for the CGE Mount with StarBright XLT Coatings
  • 25mm (81x 1.25" Eyepiece
  • 6x30mm Finderscope
  • 1.25" Star Diagonal and Visual Back
  • Dovetail Slide Bar
  • 2-Year Warranty
* The difference is about 2". The CGE uses a Losmandy "D" compatible dovetail (about 4" wide) and the CG5 uses a Vixen compatible plate (about 2" wide). 

Based on Astronomy magazine’s telescope "report cards", scopes of this size and type generally perform as follows . . .


Terrestrial Observation:Yes
Lunar Observation:Great
Planetary Observation:Good
Binary and Star Cluster Observation:Very Good
Galaxy and Nebula Observation:Good
Photography:Yes
Terrestrial Photography:Yes
Lunar Photography:Yes
Planetary Photography:Yes
Star Cluster / Nebula / Galaxy Photography:Yes


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