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Celestron - EdgeHD 1100 11" Optical Tube Assembly

Model#: 91050-XLT

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Availability: In stock


Manufactured by: Celestron


The Celestron 11" EdgeHD OTA has a light gathering power of 1593x more than the human eye, meaning it is one of the higher end optical tubes designed by Celestron. With an remarkable light gathering power, improved light transmissions with the StarBright XLT coatings, and the optical quality of the EdgeHD system which eliminates coma uniformly throughout the field of view, it therefore is able to provide pinpoint stars. This helps especially with astrophotography when the effect of coma becomes quite apparent. A great aspect with the Schmidt-Cassegrain designs are its ability to image wide varieties of celestial objects and the accessories they can accommodate to change the focal ratio. Celestron's built in Fastar system transforms this optical tube into a fast f/2! Now deep sky is the advantage here. Especially when imaging even with very large CCD sensors on the market, with a fast focal ratio like this, exposure times can be reduced tremendously and larger pixel sizes can be accommodated.

  • 1593x light gathering power
  • EdgeHD optical to eliminate coma throughout the entire field of view
  • f/10 focal ratio
  • Fastar f/2 focal ratio
  • StarBright XLT coatings for light transmission















Product Series

SEE THE UNIVERSE IN HD Introducing Celestron's New Aplanatic Schmidt Telescope Design! visibly Sharper images Superior performance. Enhanced Mechanical features fastar Compatible

EdgeHD is an aplanatic Schmidt telescope designed to produce aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma, but also to give an astrograph quality flat focal plane all the way to the edge of the field of view.



Additional Information

Name Celestron - EdgeHD 1100 11" Optical Tube Assembly
Manufacturer Celestron
Model 91050-XLT
Aperture 279.4 mm (11 in)
Dovetail Compatibility CGE Mount
Eyepiece 1 23 mm (0.91 in)
Finderscope 9x50
Focal Length 2800 mm (110.24 in)
Focal Ratio 10.02
Magnification 1 122 x
Optical Tube Aluminum
Optical Tube Length 24 in (609.6 mm)
Optical Tube Weight 28 lbs (12.7 kg)
Secondary Mirror Obstruction 3.75 in (95.25 mm)
Secondary Mirror Obstruction by Area 11.6 %
Secondary Mirror Obstruction by Diameter 34.1 %
Star Diagonal 2" w/ 1.25" adapter