Celestron CGEM Equatorial "GoTo" MountThe Celestron 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.
Ergonomic Design - The Celestrom CGEM mount 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 Celestron CGEM series has a new innovative Polar alignment procedure called All-Star (patent pending). All-Star allows users to choose any bright star, while the software calculates and assists with polar alignment. Another great feature of the CGEM 91526, 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 Celestron CGEM mount will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM 91526 mount has a robust database with over 40,000 objects, 400 user defined programmable objects and enhanced information on over 200 objects.
Celestron's CGEM 91526 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.
Features of the Celestron CGEM 91526 Equatorial Mount...
- 40,000 object database with 400 user-definable objects and expanded information on over 200 objects
- Proven NexStar computer control technology
- New "All-star" Polar alignment uses any bright star for a quick and accurate Polar alignment
- Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures, and user-defined slew limits
- Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
- Custom database lists of all the most famous deep-sky objects by name and catalog number; the most beautiful double, triple and quadruple stars; variable star; solar systems; objects and asterisms
- Permanent programmable periodic error correction (PEC) - corrects for periodic tracking errors inherent to all worm drives
- Steel worm gear and 90mm pitch diameter brass worm wheel
- Drive Motors - Low Cog DC Servo motor with integrated optical encoders offer smooth, quiet operation and long life. The motor armatures are skewed to minimize cogging which is required for low speed tracking.
- Internal Cable wiring for trouble-free setup and transportation
- Designated six-pin RJ-12 modular jack, ST-4 compatible guide port
- Autoguide port and auxiliary ports located on the electronic pier for long exposure astrophotography
- Double line, 16-character Liquid Crystal Display Hand Control with backlit LED buttons for easy operation of goto features RS-232 communication port on hand control to control the telescope via a personal computer
- Includes NexRemote telescope control software, for advanced control of your telescope via computer
- GPS Compatible with optional CN16 GPS Accessory
|Tripod or Pier Included?||Yes|
|Electronics Included||Computerized - GoTo|
|Warranty||2 Year Warranty|
|Hand Controller Included||Celestron CG Computerized|
|# of Counterweights Included||1|
|Weight of Counterweights||17 lb.|
|Tracking Rates||Lunar, Sidereal, Solar|
|Objects in Database||40,000 +|
|Mount Special Features||Spring Loaded Head Knobs|
|Legs Include Quick Release?||Yes|
|Saddle Width||D Series|
|Weight Capacity||40 lbs.|
|Leg Length||Not supplied by manufacturer|
|Accessory Tray Included?||Yes|
|Power Supply Included||DC Battery Adapter|
|Tracking Modes||EQ North, EQ South|
|Latitude Range||15º - 70º|
|Weight of Tripod/Monopod||17 lbs.|
|Weight of Head||41 lbs.|
- Celestron CGEM Mount
- Adjustable, Stainless Steel Tripod
- Accessory Tray
- Car Battery Adapter
- NexRemote Controller
- RS-232 Communication Port
- NexStar Computer Control
- Permanent Programmable Periodic Error Correction (PPEC)
- Servo Motors
- Celestron CGEM Telescope Mount Review by Catmandu
My purchase arrived on time and with both of the two packages in good condition. Since I would be mounting this on a pier, I did not immediately assemble the tripod, but it is obviously a very sturdy, high quality tripod. I will be using the tripod with my old CG5-GT mount and 127 mm SCT for quick "grab and go" visual use.
Assembly of the mount went smoothly, and after some initial problems I found the CGEM mount is easier to align and a good deal more pleasant to use than the CG5-GT mount it replaces.
Much to my dismay, when I initially powered up the mount after finishing installation, the power LED was blinking and nothing appeared on the hand control display. I immediately unplugged it and checked the power supply, a heavy duty Celestron Power Tank. Not knowing if a blinking LED was indication of a fault or if it was possibly a normal condition while the mount was booting up the system, I plugged it back in and waited a moment. To my horror, a few seconds later I noticed the unmistakable strong smell of burning electronics. I am a retired electrical engineer, skilled in failure analysis, and over the years have become intimately familiar with that odor. In a panic, I pulled the plug once again.
After rechecking and verifying there was nothing wrong with the installation or the power supply I once again cautiously applied power, this time via a car cigarette lighter socket. Thankfully, the LED came on, remained steadily lit, unblinking. The hand control booted up and immediately displayed its normal opening lines, ready for data input and alignment of the mount. After going through the alignment procedures, everything seemed to work perfectly, and the motors slewed the scope smoothly and noticeably more quietly to the target than those of the CG5 it replaces. Going back to the Celestron Power Tank, all continued to work normally.
I breathed a sigh of relief, but still wonder what burnt on initial power up. Was it perhaps some grease from the gearbox that got on the control electronics, caused a short, then burned off? Whatever the case, since all seems to be working as intended, I hesitate to box it up and return it for warranty service.
The only other problem I noted was a distinct jump of the telescope when slewing in declination axis. Further investigation found the jump was caused by loose mounting screws in the telescope saddle. Tightening of all three with the appropriate allen wrench eliminated that problem. The drive now slews smoothly, quietly and accurately with no jumps to each new target.
Tracking with this mount right out of the box seems significantly better than that of the CG5 mount, and should further improve as I refine the polar alignment and make use of the PEC feature. It handles the load of my C 9.25 SCT, 80 mm piggyback guide scope and Nightscape CCD camera effortlessly, which was pushing the limits of the CG5 mount. Also, it has interface electronics that allow the mount to be controlled via PC. This is a really cool option, and it works great! I am able to control it remotely from INDOORS via Wi-Fi. This feature will give me much more use of my setup on those cold nights that kept me from using the telescope last winter.
Overall, I am very pleased with my purchase, though the initial power-up issues still have me a bit concerned, and I will be waiting for "the other shoe to drop" for a while. It is the one thing that keeps me from giving it five stars overall. Having said that, after approximately five or six hours of use, there have been no further problems, and everything works as advertised. (Posted on 5/2/14)
- CGEM and astrophotography Review by Robert Fitzgerald
1= Houston, We Have a Problem & 5= It's Out of This World
W/O any adjustments or PEC corrections ii am able to image at native F/10 on both my C8HD and C11. The Nexstar remote software works great too. Works nicely with Maxim DL 4-5.12, CCD Autopilot and all other astro equipment. My only complaint is the mount will not Auto Meridian Flip during imaging however, it travels about two hours beyond Merdian! A top buy IMHO! (Posted on 11/9/10)
- A great value for astrophotography! Review by Chris
1= Houston, We Have a Problem & 5= It's Out of This World
The CGEM just missed a 5 star rating due to a couple small gripes: the 2 lock knobs on the saddle plate can be hard to grip when tightened - especially with gloves on in the cold - and the available alignment star choices were somewhat limited until I got to the 3rd (calibration star. Still, the mount definitely met my expectations for performance and ease of use.
An excellent value! (Posted on 12/19/08)