Celestron C8-A XLT (CGE) Optical tube
Discovery Miles 201 890
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Includes the following:
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 and dovetail slide bar.
Aperture (mm):203.2 mm (8 in)
Focal Length:2032 mm (80 in)
Focal Length of Eyepiece 1 (mm):25 mm (0.98 in)
Magnification of Eyepiece 1:81 x
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
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.
- Limiting stellar magnitude of 14.0
- Focus as close as 60' (18 m) for terrestrial viewing
- Secondary mirror obstruction of 11.0%(by area)
- Aluminum tube materials
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