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Celestron C11-SGT User Manual Page 32

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30 EdgeHD Optics
SEE THE UNIVERSE IN HD!
True asTrograph qualiTy
Many optical designs that advertise themselves as “astrograph” quality actually only
produce pinpoint stars across a curved focal plane. While this may be acceptable for visual
observing, stars will appear out of focus at the edge when used with a 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 other 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.
sTarbrighT xlT
®
CoaTings
Coupled with Celestron’s StarBright XLT coating group on every surface,
EdgeHD optics gives you maximum light throughput across the widest visual and
photographic spectrum.
EdgeHD is an aplanatic Schmidt telescope
designed to produce 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, but
also to give an astrograph quality flat focal plane
all the way to the
edge of the field
of view.
edGeHd teLeScoPeS FeatureS
n
EdgeHD Optics
n
Celestron premium StarBright XLT coatings
n
Mirror Clutches – Flexible tension clutches hold the mirror in place
and reduce image shift when rotating the tube around the mount
n
All EdgeHD optical tubes are Fastar
®
compatible for ultra fast
f/2 wide field imaging
n
Tube Vents – Cooling vents located on the rear cell allow hot air to
be released from behind the primary mirror
n
9x50 finderscope with quick release bracket to help
accurately find objects
n
Star diagonal provides a more comfortable viewing position when
observing objects that are high in the sky
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EDGE
HD
OPTICS
EDGE
HD
OPTICS
30
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HD
O
ptics
OpticsO
SEE
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SEE TSEE
HE
THE T
UNIVERSE
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CGE Pro 1400 HD
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