Celestron Optical Tube Assembly 11" XLT
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Product information
Description
The Celestron C11-A XLT Optical Tube Assembly packs serious light gathering ability into a rugged aluminum optical tube. At only 24 inches long and weighing just 27.5 pounds, this telescope is still portable enough to be taken to dark skies and set up by a single person. It's an ideal instrument for serious astrophotography.
The Celestron C11-A XLT provides excellent, high-contrast views and can perform at very high magnifications. It is equipped with Celestrons patented StarBright XLT optical coatings, which visibly increase contrast and light transmission for brighter deep space images and shorter exposure times. With StarBright XLT, you'll be able to discern subtle details while viewing the Moon and planets, as well as faint galaxies and nebulae.
The tube offers a focal ratio of f/10 with the added versatility of Fastar (see below). You can also pair it with the f/6.3 focal reducer for even more astro imaging options. The Celestron C11-A XLT can be mounted on a multitude of computerized telescope mounts thanks to its CG-5 dovetail bar. This flagship optical tube is sure to take your visual observing or imaging to the next level.
Features
11" Schmidt-Cassegrain Optical Tube Assembly
Aluminum Optical Tube
Celestrons premium StarBright XLT coatings
2800 mm focal length (f/10)
40 mm eyepiece included (70x)
Visual back allows for use with 1.25" accessories
9X50 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
Optical Design Schmidt-Cassegrain
Aperture 279.4mm (11")
Focal Length 2800mm (110")
Focal Ratio f/10
Focal Length Of Eyepiece 1 40mm (1.57")
Magnification Of Eyepiece 1 70x
Finderscope 9x50
Star Diagonal 1.25" Star Diagonal
Optical Tube Aluminum
Highest Useful Magnification 660x
Lowest Useful Magnification 40x
Limiting Stellar Magnitude 14.7
Resolution (Rayleigh) 0.5 arc seconds
Resolution (Dawes) 0.42 arc seconds
Light Gathering Power (Compared To Human Eye) 1593x
Secondary Mirror Obstruction 95mm (3.75")
Secondary Mirror Obstruction By Diameter 34%
Secondary Mirror Obstruction By Area 12%
Optical Coatings StarBright XLT
Optical Tube Length 610mm (24")
Optical Tube Diameter 312.42mm (12.4")
Optical Tube Weight 27.5 lbs (12.4 kg)
Dovetail CG-5 Dovetail bar