Celestron - C11-A XLT OTA (CG-5)

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 dovetail rail compatible with CG-5 Advanced Series
mount
OPTICAL DESIGN: Schmidt-Cassegrain 
DOVETAIL COMPATIBILITY: CG-5 Mount

APERTURE: 279.4 mm (11 in)
FOCAL LENGTH: 2800 mm (110.24 in)
FOCAL
RATIO: 10.02 
FINDERSCOPE: 9x50 
OPTICAL TUBE: Aluminum 
EYEPIECE
1: 40 mm (1.57 in)
MAGNIFICATION 1: 70 x
STAR DIAGONAL: 1.25 
OPTICAL
COATINGS: StarBright / XLT 
SECONDARY MIRROR OBSTRUCTION: 3.75 in (95.25 mm)
SECONDARY
MIRROR OBSTRUCTION BY AREA: 558744.12 %
SECONDARY MIRROR OBSTRUCTION BY DIAMETER: 9654.68
%
OPTICAL TUBE LENGTH: 24 in (609.6 mm)
OPTICAL TUBE WEIGHT: 27.5 lb (12.47 kg)