USED - C11-A XLT Optical Tube Assembly

USED GEAR INFORMATION This telescope is in great condition. The previous owner has taken great care of it and only used it a small number of times. The optical surfaces appear excellent. All original accessories are included. Original shipping materials are included as well. OTA only, mount not included. Overview 11" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Celestron's 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 choice of D-Style dovetail rail compatible with CGE mount, or V-Style dovetail rail compatible with CG-5 Advanced Series mount Description 11" Schmidt-Cassegrain Optical Tube Assembly Aluminum Optical Tube Celestron's 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 choice of D-Style dovetail rail compatible with CGE mount, or V-Style dovetail rail compatible with CG-5 Advanced Series mount Specifications Optical Design Schmidt-Cassegrain Aperture (mm) 279.4 mm (11") Focal Length 2800 mm (110") Focal Ratio 10 Focal Length of Eyepiece 1 (mm) 40 mm (1.57") Magnification of Eyepiece 1 70x Finderscope 9x50 Star Diagonal 1.25 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 95 mm (3.75") Secondary Mirror Obstruction by Diameter 34% Secondary Mirror Obstruction by Area 12% Optical Coatings StarBright / XLT Optical Tube Length 610 mm (24") Optical Tube Weight 27.5 lbs (12 kg) Dovetail Compatibility CGE Mount