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.
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.
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.
Every EdgeHD that ships have 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.
|OPTICAL TUBE INFO:|
|Focal Length:||2350mm (93")|
|Focal Length of Eyepiece 1:||23mm (0.91")|
|Magnification of Eyepiece 1:||102x|
|Star Diagonal:||2" with 1.25" adapter|
|Highest Useful Magnification:||555x|
|Lowest Useful Magnification:||34x|
|Limiting Stellar Magnitude:||14.4|
|Resolution (Rayleigh):||0.59 arc seconds|
|Resolution (Dawes):||0.49 arc seconds|
|Light Gathering Power (Compared to human eye):||1127x|
|Secondary Mirror Obstruction:||85mm (3.35")|
|Secondary Mirror Obstruction by Diameter:||36%|
|Secondary Mirror Obstruction by Area:||13%|
|Optical Coatings:||StarBright XLT|
|Optical Tube Length:||559mm (22")|
|Optical Tube Diameter:||271.78mm (10.7")|
|Optical Tube Weight:||21 lbs (9.53 kg)|
|Dovetail:||CGE Dovetail Bar|