Celestron EdgeHD 11" Optical Tube Assembly with Starbright XLT

Celestron EdgeHD 11" Schmidt-Cassegrain Optical Tube Assembly with Starbright XLT Coatings
SKU: CNOTA11EHD
Mfr. Part: 91050XLT
Item Includes EdgeHD 11 " Schmidt-Cassegrain Optical Tube Assembly with Starbright XLT Coatings - 23mm Luminos Eyepiece (2 ") - 9x50 Finderscope - 2 " 90 Degree Star Diagonal - 1.25 " Eyepiece Reducer Adapter - Celestron 2 Year Limited Warranty
Description See the Universe in HD EdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view. True Astrograph Quality Many optical designs that advertise themselves as "astrographs" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today. Improved Performance Superior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron's StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum. Mechanical Features: In addition to EdgeHD's optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night. Mirror clutches Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor). Tube vents Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 50-mesh filter guaranteed to let warm air out without letting dust in. Fastar versatility EdgeHD is the most versatile imaging telescope available today. At its native f/10, you can achieve the image scale necessary to capture the smallest of deep sky objects. Add the optional reducer lens-custom-designed for your size EdgeHD tube-and you can increase your field of view without sacrificing optical performance. A Barlow gives you added power for high-resolution planetary, lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f/2 wide field imaging. Individually Tested Every EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This "final acceptance test" confirms the EdgeHD will perform in the field and deliver high-quality astroimages. - 23mm Luminos Series 2" Eyepiece - The Luminos series eyepieces offer a wide 82 deg.field of view in both high power and low power models, allowing you to make the most of your telescope, whether you own a short, fast refractor or a Celestron EdgeHD telescope. The optical set consists of six or seven elements (depending on the model) and is fully multi-coated for crisp, sharp views. All six Luminos eyepieces are parfocal, which means you can switch out eyepieces during observing sessions with little or no additional focusing required. The Luminos eyepiece body is made of polished and anodized aluminum. A rubber grip runs around the equator of the eyepiece, giving you a secure grip and an easy method for raising and lowering the retractable eyecup. Simply twist the rubber grip to adjust the height of the eyecup. The insert barrel is threaded to accept filters. Features 82 degree Field - Wide FOV for high and low magnifications Retractible eyecups - Ultra-low profile for eyeglass wearers Parfocal eyepiece - Little or no focusing is needed when changing from low to high power Threaded barrels - Accept 2" Celestron thread-in filters Polished and hard anodized aluminum barrel - Scratch resistant and high end appearance Rubber gripping ring - For secure handling and smooth control of eyecup
Features Experience our best optical performance with EdgeHD's aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today's largest imaging sensors and widest eyepieces Aluminum optical tube with tube vents featuring an integrated 50-mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging Versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories Celestron's premium StarBright XLT coatings provide maximum light transmission A 9x50 finderscope, 2" mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all included
Specifications Optical Design EdgeHD Aperture 11" (279.4mm) Focal Length 110" (2800mm) Focal Ratio f/10 Focal Length of Eyepiece 1 0.91" (23mm) Magnification of Eyepiece 1 122x Finderscope 9 x 50 Star Diagonal 2" with 1.25" adapter Optical Tube Aluminum Highest Useful Magnification 660x Lowest Useful Magnification 40x Limiting Stellar Magnitude 14 Resolution (Rayleigh) 0.5 arc seconds Resolution (Dawes) 0.42 arc seconds Light Gathering Power 1593x (Compared to human eye) Secondary Mirror Obstruction 3.75" (95mm) Secondary Mirror Obstruction by Diameter 34% Secondary Mirror Obstruction by Area 12% Optical Coatings StarBright XLT Dovetail CGE Dovetail Bar Dimensions (L x Dia.) 24 x 12.3" (610 x 312.42mm) Weight 28 lbs (13kg) Optical Tube Focal Length 23mm (0.91 in) Angular Field of View 82 Degree Eye Relief 0.79" (20mm) Field Stop Diameter 1.46" (37mm) Optical Coatings Fully Multi Coated Optical Design 6 Element Size 2" (50.8mm) Parfocal Yes Weight 16.2 oz (459.25g)
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