Celestron C11-A XLT (CG-5) optical Tube Assembly

CELESTRON C11-A XLT (CG-5) OPTICAL TUBE ASSEMBLY

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.

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