Celestron - C11-A XLT - 11" SCT OTA for CGE/CGX - 91036-XLT

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The Celestron C11-A XLT is an 11" Schmidt-Cassegrain OTA and includes dovetail rail compatible with a CGE mount.

Fastar compatible.

Aluminum Optical Tube with Celestron's premium StarBright XLT coatings

2800 mm focal length (f/10)

40 mm eyepiece included (70x) and included 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

SKU: CEL-91036-XLT
Manufactured by:

Product Description

CELESTRON  •  C11A -XLT 11" Optical Tube Assembly (OTA)  •  91036 - XLT

Weighing only 27.5 lbs., the Celestron C11-A XLT telescope is still portable enough to be taken to dark skies, but it has 89% more light gathering power than an 8” telescope. Using an (optional) f/6.3 Focal Reducer, this 11" Schmidt Cassegrain OTA usable with a wide variety of CCD cameras. As a visual instrument you can search for all of the Messier Catalog (like beautiful M13), NGC, IC and Caldwell objects. Turn this scope to the planets and see amazing detail on the surface of Jupiter, see Cassini’s Division in the rings of Saturn, and resolve details on the surface of Mars. Even the distant Uranus, Neptune and Pluto are within your reach. 

Celestron Schmidt-Cassegrain Optical Tube Assemblies (OTA) are available individually to be used with your favorite mount. Each 11" Schmidt Cassegrain OTA is made to the same exacting standards as those used on all their high quality telescopes. All optical surfaces of the Celestron C11-A XLT are coated with StarBright XLT coatings. These tube assemblies are equipped with the same dovetail mounting bar as used on the CGE Pro or CGEM series for easy attachment to a variety of popular mounts  such as the Celestron CGE Pro or CGEM, the Losmandy G-11 and newer GM-8, Software Bisque's Paramount, and mounts by AstroPhysics.

Celestron warrants your telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. 








Name Celestron - C11-A XLT - 11" SCT OTA for CGE/CGX - 91036-XLT
Manufacturer Celestron
Model CEL-91036-XLT
UPC 050234103695
Aperture 11 in. (279.4 mm)
Dovetail Compatibility CGE (D Series)
Eyepieces 1
Eyepiece 1 40mm
Finderscope 9x50
Focal Length 2800 mm (110 in)
Focal Ratio f/10
Highest Useful Magnification 660x
Light Gathering Power 1593x
Limiting Stellar Magnitude 14.7
Lowest Useful Magnification 40x
Material aluminum
Optical Coatings StarBright / XLT
Optical Design Schmidt-Cassegrain
Optical Tube Length 24 in (610 mm)
Optical Tube Weight 27.5 lbs (12 kg)
Resolution (Dawes) 0.42 arc seconds
Resolution (Rayleigh) 0.50 arc seconds
Secondary Mirror Obstruction 3.75 in (95 mm)
Secondary Mirror Obstruction by Area 12%
Secondary Mirror Obstruction by Diameter 34%


Review and collect 50 points.
Review by:
The focus view point has a very good angle to attache a camera, the optical tube assembly is coloured in a very good and glossy black colour and it enhance the look of the OTA. Very good for astrology purposes. (Posted on 2/1/2020)
Review by:
Outstanding quality and optics! Lightweight enough for rapid setup. Easy to lift and carry. Handle on base makes for effortless attachment to mount. Epic views of Saturn its clouds and the Cassini Division in the rings. I stepped up from a C8 and the increase in light gathering and viewing detail is incredible! Folks at the shop were super friendly, knew their stuff and made me a fantastic deal! Simon was super awesome, and Daniel was the first and only person that clearly explained the differences between a C11 EdgeHd and a C11 XLT ( that is after I called no less than 3 other shops with no success)! Thanks so much you guys (Posted on 8/24/2019)
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