Celestron CGEM 925 HD, 9.25" EdgeHD Schmidt-Cassegrain Telescope - Starbright XLT Coating

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About the Celestron CGEM 925 HD

Introducing Celestron's New Aplanatic Schmidt-Cassegrain Telescope Design!
• Visibly Sharper Images
• Superior Performance
• Enhanced Mechanical Features
• Fastar® Compatible

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.

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.

Mechanical Features
In addition to Celestron's new optimized optical design, the EdgeHD tube has been redesigned to give you the most from your optics each and every night.

Mirror Clutches
Flexible tension clutcher hold the mirror in place and reduce image shift when rotating the tube around the mount. 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 chip).

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 60 micron micro-mesh filter guaranteed to let warm air out without letting dust in.

Fastar Versatility
The EdgeHD is the most versatile imaging scope available today. At its native f/10 you can achieve the image scale necessary to capture the smallest of deep sky objects. With the optional reducer lens (coming soon) you can increase your field of view without sacrificing optical performance. A barlow gives you the added power for high resolution planetary, lunar and solar imaging. And of course all EdgeHD optical tubes are Fastar® compatible for ultra fast f/2 wide field imaging. Each tube has been fitted with a removable secondary mirror and are laser bench aligned to ensure they are axially symmetric.

Celestron CGEM 925 HD Includes

  • 23mm 2" Axiom LX Eyepiece
  • 9x50mm Finderscope
  • 2" 90-Degree Mirror Diagonal -CGEM Computerized Equatorial Mount
  • 2.0" Stainless Steel Tripod with Accessory Tray
  • Car Battery Adapter
  • 11 lb Counterweight
  • 17 lb Counterweight
  • NeNexRemote Telescope Control SoftwarexRemote Control Software
  • 2-Year Warranty

Celestron CGEM 925 HD Specifications

Optical Design 9.25" Schmidt-Cassegrain
Focal Length 2350mm F/10
Finderscope 6x30mm
Mount Computerized Equatorial
Optical Tube Aluminum
Optical Coatings Starbright XLT Coating
Eyepiece 25mm (94x)
Star Diagonal 1.25"
Tripod Adjustable, Stainless Steel
Power Supply Car battery adapter
Optical Specs:Highest Useful Magnificatn 564 x
Lowest Useful Magnication 33.57 x
Limiting Stellar Magnitude 289.50
Field of View : Standard Eyepiece 53°
Secondary Mirror Obstruction 3.35in (85.09 mm)
by Area 469953 %
by Diameter 8630.66 %
Resolution: Rayleigh 4236666.07 arcsec
Dawes Limit .49 arc seconds
Gear Steel worm gear and 90mm pitch diameter brass worm wheel
Software Specs: Motor: Type Low cog DC Servo motors with encoders, both axes
Telescope Control System COMPUTER HAND CONTROL: Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
Slew Speeds Nine slew speeds: 4 °/sec, 2 °/sec, .5 °/sec, 64x, 16x, 8x, 4x, 1x, .5x
Tracking Rates Sidereal, Solar and Lunar
Tracking Modes EQ North and EQ South
Alignment Procedures 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar Align
Software Precision 24bit, 0.08 calculation
Database 40,000+ objects, 400 user defined programmable objects. Enhanced information on over 200 objects
Electronic Specs: Power Requirements 12 VDC 1.5 Amp
GPS Optional CN16 Accessory
Optical tube length 22" (558.8mm)
Telescope Weight 113 lb (51.26 kg)
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