Details
The CGEM™ mount 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 over 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.
Ergonomic Design - CGEM 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 series has a new 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 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 will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM 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 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.
Additional Information
| Mount | Computerized Equatorial |
|---|---|
| Tripod | Adjustable, Stainless Steel |
| Power Supply | Car battery adapter |
| Mount Weight | 41 lbs (19 kg) |
| Tripod Weight | 17 lbs (7.71 kg) |
| Counterweights | 1 x 17 lbs |
| Weight (lbs) | 75 lbs (34 kg) |
| Payload Capacity | 40 lbs (18 kg) |
| Latitude Range | 15° to 70° |
| Motor Drive | Low cog DC Servo motors with encoders, both axes |
| Slew Speeds | Nine slew speeds: 5 °/sec, 2 °/sec, 1 °/sec, 64x, 16x, 8x, 4x, 1x, .5x |
| 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 |
| Software Precision | 24 bit, 0.08 calculation |
| Computer Hand Control | Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons |
| Database | 40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects |
| Power Requirements | 12 VDC 3.2 Amps |
| GPS | Optional SkySync GPS Accessory |
News
- 12/01/2009 - Hot Products 2010
- 11/15/2009 - Hot Product 2010
Press Releases
Knowledge Base
- What size of scope is best for different kinds of objects?
- Aperture
- Focal length
- Contrast
- Light gathering power and magnitude limit
- Telescope-Astronomy Resources on the Web
- What does magnitude mean?
- Exit pupil
- What are diffraction-limited optics?
- What is the focal ratio? How is it related to the f-stop?
- Near focus
- Field of view
- Magnification or power
- Resolution - resolving power
- Optical design aberrations
- Why don't the images I see through my telescope look the same as photos I see taken with the same type of telescope?
- How far can I see with a telescope?
- How do you determine a telescope's magnification?
- Rough polar alignment
- Why do I need polar alignment?
- Accurate polar alignment
- Precise polar alignment
- Polar alignment for the southern hemisphere
- I upgraded-reflashed my hand control and now I'm not getting the control functions for my mount, but for another mount. What happened? How can this be fixed?
- My CGEM mount won't let the front latitude screw lock the mount. What's wrong - is the mount unstable?
- I downloaded the PECTool software from the Celestron website to my Windows Vista 32 PC. When I tried tio install it, 'ERROR: NexRemote not allowed to run on WinNTX' was displayed. How do I get it to run?
- I hibernated my GOTO mount. When I powered back up and woke up the scope, it did not point as accurately as before. What gives?
- I'm doing photography with an eyepiece, using my camera with and without a lens. What are the f-numbers of my setup for the afocal and eyepiece projection methods?
- I need to box up my scope and ship it. What's the best way to pack it?
- Why do I need to guide my telescope for photography? Don't accurate alignment and firmware functions like periodic error correction (PEC) take care of it all?
- My GPS-equipped scope is showing the wrong time information. How do I correct this?
- I am using a SkyScout Connect with my Celestron GOTO telescope. Do I still need to align my scope?
- I am using a GPS with my Celestron GOTO telescope. Do I still need to bother with SkyAlign?
- I'm looking at my Celestron scope and it has a serial number on it. Can you tell me the model, type and year it was made?
- Does the stated payload weight of my Celestron mount include the counterweights?
- Why am I getting "This mount does not support the PECTool" when using my CGE, CPC, CGEM and CGE Pro mounts?
- Why am I getting "Found Difference at Address 301: Value of 3589 should be 3590" when ugrading my CGEM motor control firmware? Is this serious?
- What are the specifications for an AC adapter that will work with Celestron's
- What is LST? Where do I find it in my GOTO scope's menu?
- When I use IDENTIFY with my GOTO scope, what is it showing me?
- My CGEM mount is moving in the wrong direction when I use the direction arrows. What is wrong? How can I change the direction of the direction buttons?
- Is there any way to run Celestron's window-based drivers and software on Macs?
- My images with a CCD camera are showing black or white streaks on the brighter stars. They are all bloomed out. What's wrong with my scope?
- Where can I download the unified ASCOM drivers for Celestron?
- What is the operating temperature range for Celestron's telescopes?
- My NexStar hand control displays "Offset Too Large" when I'm trying to change my scope's alignment. What does this mean? How to I fix the issue?
- How much will the addition of a focal reducer increase my scope's field of view?
- My Celestron software won't run on my Windows 7 computer. Help!
- I need information on the RS-232 (serial) commands for NexStar controlled telescopes.
- I have two scopes I want to use side-by-side or tandem with my Celestron CGE - CGE Pro - CGEM - Advanced GT mount. Can I do that?
- How do I balance my CGEM-mount optical tube assembly (OTA) in declination?
- Can I change the position of my CGEM equatorial head on the tripod?
- How do I quickly start my Celestron telescope? Can I use previous alignment information?
- I have a CGEM mount and I need to use it at latitudes below 15 degrees or above 70 degrees. Can I do that?
- How do I use a third party periodic error correction (PEC) program like PEMPro with my Celestron mount?
- How do I use the polar axis finderscope for the CGEM mount?
- What are the instructions for getting my CN-16 or SkySync GPS working with my Celestron GOTO mount?
- I want to permanently pier-mount my CGEM. What size is the hole on the head holding the central rod?
- My CGEM has wires dangling in the polar axis shaft. Will these interefere with the insertion and use of the polar axis finderscope #94224?
- When should I use the CALIBRATE MOUNT utility? What does it do?
- What dovetail bars or plates are used with various Celestron mounts?
- I have a Celestron GOTO scope, a Mac and an autoguider. I want to autoguide with the scope. Is your autoguider port Mac-compatible?
- Does the NexStar hand control database include IC (Index Catalogue) objects?
- The autoguiding port diagram in my manual is different than the diagram for the NexGuide connection. Are these differences important?
- What problems are possible when using a dovetail-equipped telescope tube designed for one mount when it's used with another mount?
- What's a quick summary of All-Star polar alignment with CGEM - CGEM DX, CGE, CGE Pro and Advanced GT Series mounts?
- What is the threading on the outside of my Celestron GOTO mount's power jack?
- Can all named stars listed in the hand control be used for alignment?
- What are the payload weights of Celestron mounts?
- How do I program my flash upgradeable hand control? What about motor control upgrades?
- Miscellaneous Specifications for the CGEM - CGEM DX Mount
- My Celestron mount is making a high pitched whine or hum even when it's not moving. Is this a problem?
- Can I control my Celestron GOTO mount with programs like Maxim DL?
- The hand control of my new scope shows the message “Bootloader invalid package 0080†or “Bootloader invalid package 0002â€. How can I fix this and make the mount work?
- I have a NexStar+ hand control and it's not showing my mount's name when I turn my scope on. How can I fix this?
- I have a NexStar+ hand control and I had to reprogram it after a†Bootloader error.†Now it's not showing my mount's name when I turn my scope on. How can I fix this?
- What is the screw size of the adjusting screws for the polar finderscope #94224 for the Advanced GT and CGEM – CGEM DX mount?
- What are the differences between the CGEM and CGEM DX mounts?
- What battery type is used in the CGEM and CGEM DX mounts for the real-time clock (RTC)?
- I’m experiencing motion in RA east after slews with my Celestron German GOTO mount. Is this backlash and how do I correct it?
- Will the 94224 Polar Finder work with the CGEM and the CGEM DX mounts?
- How do I replace the real-time clock (RTC) battery in my CGEM/CGEM DX mount?
- My CGEM – CGEM DX mount is missing the polar axis index sticker. How do I position a replacement sticker?
- I'm using an 11†Schmidt-Cassegrain tube (SCT) on my CGEM mount and the scope won't balance in RA. What can be done about this?
- CGEM/CGEM DX Polarscope
Downloads
Manuals
CGEM Series Manual (4.91 MB | PDF)
Reference Materials
Astronomy Basics (English, French, German, Italian, Spanish) (2.26 MB | PDF)
Telescope Basics (English, French, German, Italian, Spanish) (481.61 KB | PDF)
Telescope Maintenance (English, French, German, Italian, Spanish) (640.68 KB | PDF)
Celestial Observing (English, French, German, Italian, Spanish) (381.85 KB | PDF)
Software
Motor Control Firmware Updates v.2.2.5 (3.57 MB | ZIP)
NexRemote v. 1.7.22 (ZIP)
Hand Control Firmware Updates v.1.1.14 (3.75 MB | ZIP)
PEC Tool v.1.0.18 (3.35 MB | ZIP)

CELESTRON TWO YEAR LIMITED WARRANTY
A. Celestron warrants your telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron.
B. The Proper Return Authorization Number must be obtained from Celestron in advance of return. Call Celestron at (310) 328-9560 to receive the number to be displayed on the outside of your shipping container.
All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner, together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of Celestron.
The customer shall be responsible for all costs of transportation and insurance, both to and from the factory of Celestron, and shall be required to prepay such costs.
Celestron shall use reasonable efforts to repair or replace any telescope covered by this warranty within thirty days of receipt. In the event repair or replacement shall require more than thirty days, Celestron shall notify the customer accordingly. Celestron reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and function.
This warranty shall be void and of no force of effect in the event a covered product has been modified in design or function, or subjected to abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not covered by this warranty.
CELESTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HEREIN. THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE.
Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Celestron reserves the right to modify or discontinue, without prior notice to you, any model or style telescope.
If warranty problems arise, or if you need assistance in using your telescope contact:
Celestron
Customer Service Department
2835 Columbia Street
Torrance, CA 90503
Tel. (310) 328-9560
Fax. (310) 212-5835
Monday-Friday 8AM-4PM PST
NOTE: This warranty is valid to U.S.A. and Canadian customers who have purchased this product from an authorized Celestron dealer in the U.S.A. or Canada. Warranty outside the U.S.A. and Canada is valid only to customers who purchased from a Celestron's International Distributor or Authorized Celestron Dealer in the specific country. Please contact them for any warranty service.
Where To Buy

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