Celestron C11 Schmidt-Cassegrain OTA - 11" Optical Tube Assembly (Pre-owned)

In Stock
SKU: USED051502
Regular price $2,899.00 CAD
Regular price $4,320.00 CAD Sale Sale price $2,899.00 CAD

Product details

  • SKU USED051502


This optical tube is used, it's in great condition optically. Some minor scratches on the tube as shown in the images without any optical effect. Cleaned, collimated and tested by our technicians.

About the Celestron C11 Schmidt-Cassegrain OTA - 11" SCT Optical Tube Assembly...

Celestron Telescope Schmidt-Cassegrain Optical Tube Assemblies (OTA) are available individually to be used with your favorite mount. Each Celestron C11 is made to the same exacting standards as those used on all their high quality Celestron Telescopes. All optical surfaces are coated with StarBright XLT coatings. These tube assemblies are equipped with the same dovetail mounting bar as used on the CGE series for easy attachment to a variety of popular Celestron Telescope Mounts and Tripods.


Weighing only 27.5 lbs., the C11 Schmidt-Cassegrain OTA - 11" SCT Optical Tube Assembly is still portable enough to be taken to dark skies, but it has 89% more light gathering power than an 8" Celestron Telescope. Using an f/6.3 Focal Reducer makes it usable with a wide variety of Celestron CCD Cameras. As a visual instrument you can search for all of the Messier Catalog, NGC, IC and Caldwell objects. Turn this Celestron Telescope 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.


Additional Celestron Telescope Eyepieces, Celestron Telescope Mounts and Tripods, and Celestron Telescope Accessories are readily available!



Celestron C11 Schmidt-Cassegrain OTA - 11" SCT Optical Tube Assembly Features...


  • 11" Schmidt-Cassegrain Optical Tube Assembly


  • Aluminum Optical Tube


  • Celestron'''s premium 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

  • Includes dovetail rail compatible with CGE Series mount


Celestron C11-A XLT Schmidt-Cassegrain OTA - 11" SCT Optical Tube Assembly Specifications...

Optical Design: Schmidt-Cassegrain

Aperture (mm): 279.4 mm (11 in)

Focal Length (mm): 2800 mm (110 in)

Focal Ratio: f/10

Eyepiece 1 (mm): 40 mm (1.57 in)

Magnification 1: 70 x

Finderscope: 9x50

Star Diagonal: 1.25

Optical Tube: Aluminum

Highest Useful Magnification: 660 x

Lowest Useful Magnification: 40 x

Limiting Stellar Magnitude: 14.7

Resolution (Rayleigh): 0.5 arc seconds

Resolution (Dawes): 0.42 arc seconds

Light Gathering Power (Compared to human eye): 1593 x

Secondary Mirror Obstruction: 3.75 in (95 mm)

Secondary Mirror Obstruction by Diameter: 34 %

Secondary Mirror Obstruction by Area: 12 %

Optical Coatings: StarBright / XLT

Optical Tube Length: 24 in (610 mm)

Optical Tube Weight: 27.5 lbs (12 kg)

Dovetail Compatibility: CGE Mount