Celestron Edge HD 1100 CGE Optical Tube

11 "(280mm) Schmidt-Cassegrain Edge HD Optical Tube with Fully Flat Optical System. We have an aplanatic telescope free of field curvature aberrations and as. It will allow you to see detailed stellar images across the field without any traces or shapes" donut. "

Specially designed for astrophotography, with all the material tested from the factory. The optical tube is aluminum and incorporates a 9 x 50 finder. StarBright XLT optical treatment and dovetail adaptable to CGE mount.
Characteristics:

• Optical Design: EdgeHD
  
• Opening (mm): 279.4 mm (11 inches)
  
• Focal length: 2800 mm (110 inches)
  
• Focal Ratio: 1/10
  
• Eyepiece 1 focal length (mm): 23 mm (0.91 in)
  
• Eyepiece magnification 1: 122 x
  
• Finder Telescope: 9x50
  
• Diagonal: "w / 1.25" 2 star adapter
  
• Aluminum Optical Tube
  
• Maximum useful magnification of: 660 x
  
• Minimum useful magnification: 40x
  
• Stellar Limit Magnitude: 14.7
  
• Resolution (Rayleigh): 0.5 arcseconds
  
• Resolution (Dawes): 0.42 arcseconds:
  
• Light Energy Encounter (compared to the human eye) 1593 x
  
• Secondary Obstruction Mirror: 3.75 in (95mm)
  
• Secondary Mirror obstruction by Diameter: 34%
  
• Secondary Mirror obstruction by Area: 12%
  
• Optical Coatings: StarBright XLT
  
• Optical 24 Inch Tube Length: (610mm)
  
• Optical Tube Weight: 28 lbs (13 kg)
  
• Dovetail compatibility: CGE Montura