235mm Schmidt-Cassegrain OTA 2350mm Focal Length, f/10 Focal Ratio CGEM II Motorized Equatorial Mount NexStar+ Computer Controller Database of 40,000+ Objects Multiple Assisted Alignment Procedures Guided Tours and Custom Object Filters Backlash Compensation and PPEC 1.25" 25mm Eyepiece and 90° Diagonal 2" Adjustable Stainless Steel Tripod
OPTICAL TUBE FEATURES
9.25" Schmidt-Cassegrain Optical Tube Assembly Celestron's premium StarBright XLT coatings 2350 mm focal length (f/10) 25 mm eyepiece included (94x) Visual back allows for use with 1.25" accessories 6x30 finderscope to help accurately center alignment objects Star diagonal provides more comfortable viewing position when observing objects that are high in the sky Includes large CGE style dovetail mounting bar 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 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 USB 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
Some 40 years ago, Celestron founder - Tom Johnson - introduced the
first Celestron Schmidt-Cassegrain telescopes into the amateur astronomy
market and began a revolution. Now, Celestron's CGEM-II-925 takes
performance to a new level beginning with the extreme optical quality of
the 9.25" Schmidt Cassegrian combined with Starbright XLT coatings
mounted on Celestron's newly engineered and innovative CGEM-II mount.
This new take on a tried and true design has given the world another
Celestron "classic" - one capable of carrying the load securely and
vibration free... and taking both astro imaging and visual observing to
new heights.
Still more? Then consider the many features that make the Celestron
CGEM-II a "gem" for astrophotography, too. It can be as simple as adding
a Celestron NexImage Solar System Imager to the CGEM-II-925, or even
just adapting a digital camera. Not only will it track well past the
meridian for uninterrupted imaging through the most ideal part of the
sky, but the Permanent Periodic Error Correction (PPEC) will allow users
to train out the worm gears periodic errors, while the mount retains
the PEC recordings. Autoguide port and auxiliary ports are conveniently
located on the electronic plate for long exposure astrophotography and
include a designated six-pin RJ-12 modular jack and ST-4 compatible
guide port. You'll find an RS-232 communication port on hand control to
control the telescope via a personal computer and NexRemote telescope
control software, for advanced control. Software features include; mount
calibration, database filter limits, hibernate, five alignment
procedures, and user-defined slew limits. What's even better is that
it's all flash upgradeable. Just connect to the Internet to update your
hand control software and motor control units. You can even add an
optional Celestron GPS unit!
The Celestron CGEM-II 925 carries
on the Celestron tradition of performance, durability and value. Major
colleges and universities worldwide use Celestron telescopes in their
astronomy programs and the Celestron telescope line has been chosen over
all competing models by NASA to be taken on several space shuttle
research missions. Why not add a Celestron SkyScout to the fun?
Celebrate the International Year of Astronomy with Celestron and bring
that kind of quality home to your backyard tonight...
Optical Design
Schmidt-Cassegrain
Aperture (mm)
234.95 mm (9.25 in)
Focal Length
2350 mm (93 in)
Focal Ratio
10
Focal Length of Eyepiece 1 (mm)
25 mm (0.98 in)
Magnification of Eyepiece 1
94 x
Finderscpoe
6x30
Star Diagonal
1.25
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
20 lbs. (9.07 kg)
Dovetail Compatibility
CGE Mount
Mount Info:
Mount Type
German Equatorial Mount
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 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
Computerized Hand Control
Double line, 16 character Liquid Crystal Display; 19 fiber optic
Database
40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
Mount Weight
40 lbs
Tripod Weight
20 lbs
Weight of Counterweight
1x 17 lbs, 1x 11 lbs Counterweights
Total Weight of Mount Kit
77 lbs
C925 SCT Optical Tube Assembly
CGE-II Mount
Heavy duty 2" Aluminum Tripod
Accessory Tray
NexStar Control
PPEC (Permanent Periodic Error Compensation)
RS-232 Port
Software
Star Diagonal
25mm Eyepiece
6X30 Finderscope
Car Battery Adapter
Cables
Drive Motors
Counterweight
Dust Caps
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