C8 OPTICAL TUBE ASSEMBLY (CGE DOVETAIL) - SKU# 91024-XLT
- 8" Schmidt-Cassegrain optical tube assembly (OTA)
- Features Celestron's premium patented StarBright XLT coatings
- 2032 mm focal length (f/10)
- Fastar compatible
- Tube constructed of durable and lightweight aluminum
- Includes: 25mm eyepiece (81x), 6x30 optical finderscope, star diagonal, 1.25” visual back, CGEM style dovetail bar
The views are much more impressive than what you’d expect from such a compact instrument. The tube offers 2032 mm of focal length and a focal ratio of f/10.
The Celestron C8-A can be mounted on a multitude of computerized telescope mounts thanks to its CGEM style dovetail bar. This iconic optical tube provides the best balance of portability, handling ease, light gathering ability and price ever offered to the amateur astronomer.
With Fastar, the SCT’s secondary mirror can be removed and replaced with a field-flattening lens assembly (sold separately by third party manufacturers) so that a CCD camera can be used in the front of the telescope at the f/2 focus of the instrument’s primary mirror. The potential of the Fastar system is staggering: exposures are 25 times shorter than if the camera was placed at the instrument’s native f/10 focus.
StarBright XLT is Celestron’s revolutionary optical coating system. It consistently outperforms all other coatings in the commercial telescope market.
|OPTICAL TUBE INFO:|
|Focal Length:||2032mm (80")|
|Focal Length of Eyepiece 1:||25mm (0.98")|
|Magnification of Eyepiece 1:||81x|
|Star Diagonal:||1.25" Star Diagonal|
|Highest Useful Magnification:||480x|
|Lowest Useful Magnification:||29x|
|Limiting Stellar Magnitude:||14|
|Resolution (Rayleigh):||0.69 arc seconds|
|Resolution (Dawes):||0.57 arc seconds|
|Light Gathering Power (Compared to human eye):||843x|
|Secondary Mirror Obstruction:||64mm (2.5")|
|Secondary Mirror Obstruction by Diameter:||31%|
|Secondary Mirror Obstruction by Area:||9.77%|
|Optical Coatings:||StarBright XLT|
|Optical Tube Length:||432mm (17")|
|Optical Tube Diameter:||238mm (9.37")|
|Optical Tube Weight:||12.5 lbs (5.67 kg)|
|Dovetail:||CGE Dovetail Bar|