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or 4 easy payments of $1,762.25
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About this product
Outfitted with an over-sized aperture, long effective focal length, and their proprietary StarBright XLT optical coatings, theCelestron C11-A XLT 11" f/10 Schmidt-Cassegrain Telescopeprovides 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.
Secondary mirror obstruction: 3.75" (95 mm); 34% by diameter; 12% by area
StarBright XLT System
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
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
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