Celestron CGEM II 925 EdgeHD 9.25" Schmidt-Cassegrain TelescopeSKU: CNCGEM2925HMfr. Part: 12018
40mm 1.25" Plossl Eyepiece - 9x50mm Finderscope - Finderscope Bracket - 2" 90-Degree Mirror Diagonal - Dovetail Slide Bar - Lens Caps - CGEM Motorized Equatorial Telescope Mount with Tripod - NexStar Hand Controller - Counterweight Shaft - 17 lb Counterweight - Tripod - 2-Year USA Warranty
CGEM II 925 HD combines Celestron's newly redesigned CGEM II computerized equatorial mount with its acclaimed EdgeHD optical system. With over 9 inches of aperture and our premium StarBright XLT coatings, the CGEM II 925 HD gives you over 1000 times the light gathering power than the unaided eye. Designed to give diffraction limited performance and offer more resolution than the 800 with less weight than the 1100, the CGEM II 925 HD is a premier astroimaging telescope.
OPTICAL TUBE INFO:
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.
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 95-micron micromesh 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 lens 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.
A fresh update to the venerable CGEM mount, the CGEM II has a fresh, attractive, bold appearance and is capable of carrying Celestron's higher-end SCT optical tubes (up to 11") securely and vibration free, which is ideal for both imaging and visual observing. Capable of holding 40 lbs. of payload and slewing at 5° per second, you will be able to instantly point to any of the celestial objects in the database.
CGEM II was designed to be ergonomically friendly with large Altitude and Azimuth adjustment knobs for quick and easy polar alignment adjustment. The internal RA and DEC motor wiring provides a clean look and an easy and trouble free set up.
The CGEM II series features Celestron's innovative Polar alignment procedure called All-Star All-Star allows users to choose any bright star, while the software calculates and assists with polar alignment. Another great feature of the CGEM II sure to please astroimagers, is the Permanent Periodic Error Correction (PEC) which will allow users to train out the worm gears periodic errors, while the mount retains the PEC recordings.
For objects near the Meridian (imaginary line passing from North to South), the CGEM II will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM II mount has a robust database with over 40,000 objects, 100 user defined programmable objects and enhanced information on over 200 objects. Celestron's CGEM II mount is the perfect fit between the Advanced Series and CGE Series. Offering the portability of the Advanced Series and the precision of the CGE.
COMPUTERIZED MOUNT FEATURES
40 lbs payload capacity
Dual-fit Vixen/CG-5 and Losmandy/CGE dovetail saddle
2" steel legs with height index marks for quick leveling
USB 2.0 port on hand control for direct links to a PC via ASCOM supported software.
40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
Internal cabling throughout for worry-free remote operation
Low cog DC Servo motor with integrated optical encoders offer smooth, quiet operation
Able to track past the meridian allowing seamless imaging
Permanent periodic error corrections allow users to train out the worm gears periodic errors once, while the mount retains the PEC recordings.
Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures, and user-defined slew limits
Built-in polar alignment program to polar align on any star in the sky
Longer clutch levers to make tightening and loosening of clutches easier
Custom database lists of all the most famous deep-sky objects by name and catalog number
Solar System alignment method allows to view the moon and planets during the day
Permanent Programmable Periodic Error Correction (PEC) corrects periodic tracking errors inherent to all worm drives
Custom Rate 9 feature allows to set maximum slew rate
Tandem mode allows to star align the mount even when positioned for tandem scope use
RS-232 communication port on hand control to control the telescope via a personal computer
Includes NexRemote telescope control software, for advanced control of telescope via computer
Precision machined 40 mm diameter steel Polar shafts supported by multiple tapered roller bearings and ball bearings
GPS-compatible with optional SkySync GPS Accessory
9.25" EdgeHD opticsCGEM II computerized equatorial mountCelestron's premium StarBright XLT coatingsA 9x50 finderscope, 2" mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all includedIncludes large CGE style dovetail mounting barEdgeHD aplanatic, flat field SCT optics for pinpoint stars to the edge of the largest imaging sensors and widest eyepieces. Lightweight and portableAluminum optical tube with tube vents featuring an integrated 95-micron 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 imagingVersatile 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
Optical DesignEdgeHDAperture (mm)234.95 mm (9.25 in)Focal Length2350 mm (93 in)Focal Ratio10Focal Length of Eyepiece 1 (mm)23 mm (0.91 in)Magnification of Eyepiece 1102 xFinderscope9x50Star Diagonal2" w/ 1.25" adapterHighest Useful Magnification555 xLowest Useful Magnification34 xLimiting Stellar Magnitude14.4Resolution (Rayleigh)0.59 arc secondsResolution (Dawes)0.49 arc secondsLight Gathering Power1127 xSecondary Mirror Obstruction3.35 in (85 mm)Secondary Mirror Obstruction by Diameter36%Secondary Mirror Obstruction by Area13%Optical CoatingsStarbright XLT CoatingOptical Tube Length22 in (559 mm)Optical Tube Weight20 lbs (9.07 kg)Dovetail CompatibilityCGE / CGX MountMount TypeGerman Equatorial MountInstrument load capacity55 lbs.Tripod Height Adjustment Range47.25" to 77.5" including EQ headATripod Leg Diameter2"Latitude Adjustment Range3 degreee to 65 DegreeTripod Weight19.2 lbs.EQ Head Weight44 lbs.Max Slew Speed5 Degree/second (4 Degree/second is default)Tracking RatesSidereal, Solar and LunNumber of Auxiliary Ports2Autoguide PortYesUSB PortYesSoftwareNew telescope control PC software
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