C11-A XLT (CGE) OPTICAL TUBE ASSEMBLY
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C11-A XLT (CGE) OPTICAL TUBE ASSEMBLY

C11-A XLT (CGE) OPTICAL TUBE ASSEMBLY

CelestronSKU: 91036
Price:
$4,447.99 CAD
Stock:
On Backorder — ships when available

Dew protection (11")

Sized for this telescope. Dew ends more Ontario nights than cloud does.
  • Description

GENERAL FEATURES

· 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 CGE mount

GENERAL FEATURES

· 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 CGE mount

SPECIFICATIONS

Optical Design

Schmidt-Cassegrain

Aperture (mm)

279.4 mm (11 in)

Focal Length

2800 mm (110 in)

Focal Ratio

10

Focal Length of Eyepiece 1 (mm)

40 mm (1.57 in)

Magnification of Eyepiece 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

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