Celestron Schmidt-Cassegrain Optical Tube Assemblies (OTA) are available individually for use with your favorite mount. Each OTA is made to the same exacting standards as those used on all our high quality telescopes. All optical surfaces are coated with Celestron’s high efficiency StarBright® multi-layered coating group. These tube assemblies are equipped with the same dovetail mounting bar used on the CGE and Advanced Series for easy attachment to a variety of popular mounts.
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 Broad
SPECIFICATIONS:
OPTICAL DESIGN: Schmidt-Cassegrain
DOVETAIL COMPATIBILITY: CGE Broad 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: 11.6 %
SECONDARY MIRROR OBSTRUCTION BY DIAMETER: 34.1 %
OPTICAL TUBE LENGTH: 24 in (609.6 mm)
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
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How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
