Description
Outfitted with an over-sized aperture, long effective focal length, and their proprietary StarBright XLT optical coatings, the Celestron Celestron C11-A XLT f/10 Schmidt-Cassegrain Telescope provides power and portability. The coating system consists of anti-reflection coatings on the corrector plate, highly reflective index mirror coatings, and low-absorption/high-transmission glass components to ensure that the maximum amount of light is gathered and transmitted to the user’s eye.
The Celestron C11-A XLT ensures bright and clear high-contrast images with accurate color rendition across the entire visual spectrum without visible distortion at the edges. Celestron includes a standard 1.25″ visual back to accept eyepieces and accessories such as the 40mm eyepiece and 90° diagonal supplied with the optical tube assembly (OTA). This OTA is offered here without a mount or tripod for users who already have a support system – just ensure the mount’s payload capacity exceeds 27.5 pounds to safely carry the weight, and has a Vixen-style saddle to match the OTA’s CG-5 mounting plate.
General Features
- 11″ Schmidt-Cassegrain Optical Tube Assembly
- Aluminum Optical Tube
- Celestron’s premium StarBright XLT coatings
- 2800 mm focal length (f/10)
- 40 mm eyepiece included (70x)
- Visual back allows for use with 1.25″ accessories
- 9×50 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
Specifications
- Aperture (mm): 279.4 mm (11 in)
- Dovetail Compatibility: CG-5 Mount
- Finderscope: 9×50
- Focal Length: 2800 mm (110 in)
- Focal Length of Eyepiece 1: 40 mm (1.57 in)
- Focal Ratio: 10
- Highest Useful Magnification; 660 x
- Light Gathering Power: 1593 x
- Limiting Stellar Magnitude; 14.7
- Lowest Useful Magnification: 40 x
- Magnification of Eyepiece 1: 70 x
- Optical Coatings: StarBright / XLT
- Optical Design: Schmidt-Cassegrain
- Optical Tube: Aluminum
- Optical Tube Length: 24 in (610 mm)
- Optical Tube Weight: 27.5 lbs (12 kg)
- Resolution (Dawes): 0.42 arc seconds
- Resolution (Rayleigh): 0.5 arc seconds
- Secondary Mirror Obstruction: 12%
- Secondary Mirror Obstruction: 3.75 in (95 mm)
- Star Diagonal: 1.25
