Celestron CGEM II 9.25" (925) EdgeHD Telescope

£3,989.00

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Model: cel_cgem_ii_925_edgehd_12018
Part Number: 12018
Brand: Celestron

Celestron

Celestron products include a two year warranty except binoculars and spotting scopes which have limited lifetime warranties.

Product Info
Specifications
Downloads & Manuals
Q&A
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INCLUDED IN THE BOX

Telescope OTA
9x50 Finderscope
2" Star Diagonal
23mm Luminos 2" Eyepiece
CGEM II Equatorial Head
CGEM II Tripod
Accessory Tray
Counterweight bar with locking nut
Counterweight
Azimuth adjustment screws (x2)
Hand Control
Hand control holder (2 pieces)
DC Power Cable (Cigar Plug)

New Celestron CGEM II 9.25" EdgeHD

CGEM II 925 HD combines Celestron's newly redesigned CGEM II computerised 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.

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.

Ergonomic Design

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.

Innovation

The CGEM II series features Celestron’s innovative All-Star Polar alignment procedure. All-Star allows you to accurately polar align the mount using any star, even if the celestial pole cannot be seen. 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.

Performance

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 VX Series and CGX Series.

FEATURES

9.25” EdgeHD optics
CGEM II computerized equatorial mount
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
EdgeHD aplanatic, flat field SCT optics for pinpoint stars to the edge of the largest imaging sensors and widest eyepieces. Lightweight and portable
Aluminum 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 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

CGEM II 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 levelling
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

Product Specifications

Optical Design	EdgeHD
Aperture (mm)	234.95 mm (9.25 in)
Focal Length	2350 mm (93 in)
Focal Ratio	10
Focal Length of Eyepiece 1 (mm)	23 mm (0.91 in)
Magnification of Eyepiece 1	102 x
Finderscpoe	9x50
Star Diagonal	2" w/ 1.25" adapter
Optical Tube	Aluminum
Highest Useful Magnification	555 x
Lowest Useful Magnification	34 x
Limiting Stellar Magnitude	14.4
Resolution (Rayleigh)	0.59 arc seconds
Resolution (Dawes)	0.49 arc seconds
Light Gathering Power (Compared to human eye)	1127 x
Secondary Mirror Obstruction	3.35 in (85 mm)
Secondary Mirror Obstruction by Diameter	36%
Secondary Mirror Obstruction by Area	13%
Optical Coatings	StarBright XLT
Optical Tube Length	22 in (559 mm)
Optical Tube Weight	21 lbs. (9.53 kg)
Dovetail Compatibility	CGE Mount
Mount	German Equatorial
Tripod	2” Steel tripod with graduated markings on lower section
Dovetail Mount	Directly connects to both CG-5 & CGE dovetail bars
Payload Capacity	40 lbs
Latitude adjustment range	15º – 70º
Power Requirements	12 VDC, 3.2 amps
Ports	1x Hand control port, 1x Auxiliary Port, 1x Auto guider port, 1 USB 2.0 port (on hand control)
Motor Drive	Low cog DC servo motors
Slew Speeds	9 slew speeds
Tracking Rates	Sidereal, Solar and Lunar
Tracking Modes	EQ North and EQ South
Alignment Procedures	AutoAlign, 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
Computerised Hand Control	Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons, USB 2.0 port for PC connection
Database	40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
Mount Weight	40lbs
Tripod Weight	20lbs
Weight of Counterweight	17lbs
Total Weight	77lbs

The following manuals and downloads are available for this product:

Manuals

Celestron CGEM II Mount Manual (PDF)

Celestron CGEM II 9.25" (925) EdgeHD Telescope Questions & Answers

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