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User Manual for Celestron C11-A XLT 11" f 10 Schmidt-Cassegrain Telescope Click to enlarge the picture
Contents of the user manual for the Celestron C11-A XLT 11" f 10
- Product category: Catadioptrics (Cassegrains) Celestron
- Brand: Celestron
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Celestron Catadioptrics (Cassegrains)
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User manual for the Celestron C11-A XLT 11" f 10 contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Celestron product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Celestron user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Celestron product will considerably shorten its lifespan!
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Product description Outfitted with an over-sized aperture, long effective focal length, and their proprietary StarBright XLT optical coatings, the Celestron C11-A XLT 11" f/10 Schmidt-Cassegrain Telescope provides power and portability. The coating system consists of anti-reflection coatings on the corrector plate, highly reflective index mirror coatings, and low-absorption/high-transmission glass components to ensure that the maximum amount of light is gathered and transmitted to the user's eye. This system ensures bright and clear high-contrast images with accurate color rendition across the entire visual spectrum without visible distortion at the edges. Celestron includes a standard 1.25" visual back to accept eyepieces and accessories such as the 40mm eyepiece and 90° diagonal supplied with the optical tube assembly (OTA). This OTA is offered here without a mount or tripod for users who already have a support system—just ensure the mount's payload capacity exceeds 27.5 pounds to safely carry the weight and that the mount has a Vixen-style saddle to match the OTA's CG-5 mounting plate. - Optical Tube
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- 11" (279.4mm) aperture
- f/10 focal ratio
- 2800mm effective focal length
- Schmidt-Cassegrain design optical path
- StarBright XLT optical coatings
- Resolution: 0.5 arcsec (Rayleigh); 0.42 arcsec (Dawes)
- Secondary mirror obstruction: 3.75" (95 mm); 34% by diameter; 12% by area
- StarBright XLT System
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- Maximizes light transmission through optical path
- Improves color rendition, contrast, sharpness, resolution, and brightness
- Broadband system provides flat wavelength transmission across the entire visual spectrum
- Multi-layer mirror coatings with layers of aluminum, SiO2 (quartz), and TiO2 (titanium dioxide)
- Multi-layer anti-reflective corrector plate coatings with layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide); hafnium has a wider band-pass than the commonly used titanium
- High-transmission water white glass corrector plate limits light loss due to internal absorption
- Mounting
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- Optical tube only—mount and tripod required for proper use
- Supplied with CG-5 dovetail plate, which is compatible with Vixen-style saddles
- Mount must have a payload capacity of over 27.5 pounds to safely support the OTA
- Included Accessories
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- Visual back:
- Standard threads for Schmidt-Cassegrain telescope optical tubes
- 1.25" holder accepts 1.25" eyepieces and accessories
- Eyepiece:
- 1.25"-diameter barrel
- Accepts most 1.25" astronomical filters
- 40mm focal length produces 70x magnification
- Diagonal:
- 1.25"-diameter barrel
- 90° angle places head in comfortable viewing position when scope is aimed at or near the zenith
- Star diagonal corrects view horizontally, but not vertically
- Finderscope:
- 9x magnification
- 50mm aperture
- Mounting bracket included
UPC: 050234106795 In the Box Celestron C11-A XLT 11" f/10 Schmidt-Cassegrain Telescope (OTA Only, CG-5 Dovetail) 40mm Eyepiece 1.25" 90° Diagonal SCT Visual Back 9x50mm Finderscope Universal Mounting Plate, CG-5 csbwsfzufzrxyr Limited 2-Year Warranty Table of Contents
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Technical parametersCelestron C11-A XLT Specs | Optical Design | Schmidt-Cassegrain | | Aperture | 279mm | | Focal Length | 2800mm | | Focal Ratio | f/10 | | Eyepiece Barrel Diameter | 1.25" | | Diagonal | 90° star
1.25" barrel | | Finderscope | 9x50 mm | | Tripod | None | | Mount Type | CG-5 dovetail plate | | Power Source | None | | Optical Tube Length | 24.0" / 61.0 cm | | Weight | 27.5 lbs / 12.5 kg | | | | Package Weight | 38.9 lb | | Box Dimensions (LxWxH) | 28.0 x 20.0 x 18.5" |
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