Celestron CGEM II Computerized Telescope Mount Review

The Truth About Using the Celestron CGEM II Computerized Telescope Mount

As an equipment specialist with over a decade of hands-on experience across diverse environments, from the dust of outdoor expeditions to the sterile precision of laboratories, I approach new gear with a critical, seasoned eye. The Celestron CGEM II Computerized Telescope Mount is a significant piece of equipment, promising robust performance for both visual astronomy and astrophotography. My journey to this mount began with a growing need for a more stable and accurate platform for my imaging pursuits, especially as I moved to larger optical tubes that were outgrowing my previous, less capable mount. It’s designed to bridge the gap between Celestron’s entry-level and high-end offerings, aiming for a sweet spot of capability and affordability for serious hobbyists. My initial impression upon unboxing was one of solid, professional construction; the anodized aluminum and steel components felt substantial and well-machined. While I briefly considered other brands known for their equatorial mounts, the CGEM II’s specific feature set and Celestron’s established reputation in the astronomy market made it a compelling choice. The immediate feeling was one of eager anticipation, a quiet confidence that this mount might finally be the answer to my imaging frustrations.

Real-World Testing: Putting Celestron CGEM II Computerized Telescope Mount to the Test

First Use Experience

My initial testing grounds for the Celestron CGEM II Computerized Telescope Mount were my backyard observing spot and a dark sky site a few hours away, where I mounted a Celestron EdgeHD 800 telescope. The setup process was surprisingly streamlined, significantly faster than expected, especially with the user feedback mentioning the ease of polar alignment without a dedicated polar scope. The large altitude and azimuth adjustment knobs made fine-tuning the polar alignment remarkably straightforward, even under chilly evening skies. Performance was immediately noticeable; the mount slewed to targets with a smooth, controlled motion, and the initial tracking accuracy was impressive, even before engaging Permanent Periodic Error Correction (PEC). I encountered no immediate issues, only a sense of smooth operation and reliable pointing accuracy that immediately boosted my confidence.

Extended Use & Reliability

After several months of regular use, spanning multiple observing sessions and dedicated astrophotography nights, the Celestron CGEM II Computerized Telescope Mount has proven itself to be a reliable workhorse. It consistently holds its alignment well, even after extended periods of tracking celestial objects throughout the night. Durability has been excellent; despite being transported and set up in varying weather conditions, there are no signs of undue wear, cracks, or stiffness in any of the moving parts. Maintenance is minimal, primarily involving keeping the mount clean and ensuring its gears are properly lubricated as per the manufacturer’s recommendations, which is a simple process. Compared to my previous, less robust mount, the CGEM II offers a night-and-day difference in stability and tracking precision, making longer exposures a reality and significantly reducing the need for constant guiding adjustments, a welcome improvement over budget options.

Breaking Down the Features of Celestron CGEM II Computerized Telescope Mount

Specifications

The Celestron CGEM II Computerized Telescope Mount boasts a robust 40 lbs payload capacity, which is crucial for securely supporting heavier optical tubes like Celestron’s own 11-inch SCTs without compromising stability. Its dual-fit Vixen/CG-5 and Losmandy/CGE dovetail saddle offers exceptional versatility, allowing for a wide range of telescope compatibility. The mount features 2″ steel legs with height index marks, facilitating quick and precise leveling for initial setup. A key innovation is the USB 2.0 port on the hand control, enabling direct PC connection via ASCOM-supported software for advanced control and automation. The 40,000-object database is extensive, offering over 100 user-definable objects and expanded information on over 200 objects, providing quick access to celestial targets. Internal cabling throughout the mount contributes to a cleaner aesthetic and simpler setup, reducing snag hazards during operation. The low cog DC Servo motors with integrated optical encoders ensure smooth, quiet, and precise tracking, essential for high-magnification viewing and long-exposure imaging. The mount’s ability to track well past the Meridian is a significant advantage for astrophotographers, allowing uninterrupted imaging through optimal sky regions. Permanent Programmable Periodic Error Correction (PEC) is a standout feature for imagers, allowing the mount to “learn” and correct the inherent tracking errors of worm gears over time, storing these corrections for future sessions.

Performance & Functionality

In terms of performance, the Celestron CGEM II Computerized Telescope Mount excels at its primary function: accurately tracking celestial objects. Its 40 lbs payload capacity translates to exceptionally stable tracking, even with significant imaging equipment attached. The low cog DC Servo motors provide smooth slewing and tracking, minimizing vibrations that can ruin long exposures. The All-Star Polar alignment procedure is indeed intuitive and effective, allowing for accurate alignment even when the celestial pole is obscured. The mount’s ability to track past the Meridian is a crucial functionality for maximizing imaging time on targets. Its database is vast, and the user-definable object feature is a handy addition for frequent targets. The Permanent PEC is a game-changer for astrophotography, significantly reducing the need for autoguiding for many targets and providing consistently sharper images. This mount genuinely meets and often exceeds the expectations for its price point, offering performance often found in higher-tier mounts.

Design & Ergonomics

The design of the Celestron CGEM II Computerized Telescope Mount is a clear step up in user-friendliness. The ergonomic design with large altitude and azimuth adjustment knobs makes polar alignment a much less tedious affair than with smaller, fiddlier knobs. The internal RA and DEC motor wiring not only looks cleaner but also prevents accidental snags and damage to cables during operation, which is a thoughtful touch for any user, especially those operating in busy observing environments. The longer clutch levers for the RA and DEC axes are a welcome ergonomic improvement, making it easier to lock down the axes firmly without excessive force. The 2″ steel legs of the tripod provide a stable base, and the height index marks are a practical addition for quickly setting up on uneven terrain. The overall build quality feels robust and durable, suggesting this mount is built to withstand years of use.

Durability & Maintenance

Given its substantial steel and aluminum construction, the Celestron CGEM II Computerized Telescope Mount appears to be built for long-term durability. Its components feel solid, and the precision machining suggests components designed to withstand repeated use without premature wear. Maintenance is straightforward: keeping the mount clean from dust and debris and occasionally checking the gear lubrication is usually sufficient. For extended periods of storage, covering the mount is advisable to protect the delicate internal mechanisms. I have encountered no specific failure points during my testing, but as with any precision instrument, proper handling and care will be key to its longevity. The internal cabling, while a design benefit, means that any internal motor or wiring issues would likely require professional servicing rather than simple field repair.

Accessories and Customization Options

The Celestron CGEM II Computerized Telescope Mount comes with essential accessories for immediate use. The hand control is central to its operation, and it includes the NexRemote telescope control software, allowing for advanced control via a personal computer, which is a significant bonus for automation and remote observing. The mount is GPS-compatible with the optional SkySync GPS Accessory, which streamlines the initial alignment process by automatically inputting location and time data. While not direct accessories, the dual-fit dovetail saddle is a crucial customization feature, accommodating both Vixen and Losmandy dovetail bars, offering immense flexibility in telescope choice. The Custom Rate 9 feature allows users to set maximum slew rates, offering a level of customization for different observing scenarios. The inclusion of the NexRemote software and the compatibility with the SkySync GPS accessory enhance the mount’s overall utility and integration into a more advanced astro-imaging setup.

Pros and Cons of Celestron CGEM II Computerized Telescope Mount

Who Should Buy Celestron CGEM II Computerized Telescope Mount?

The Celestron CGEM II Computerized Telescope Mount is an excellent choice for serious amateur astronomers and astrophotographers who have outgrown entry-level mounts and are looking for a reliable, feature-rich platform for medium to larger optical tubes. It’s ideal for those who prioritize stability and accurate tracking for both visual observing and long-exposure imaging. Anyone looking to invest in a mount that offers a significant step up in performance without jumping into the much higher price bracket of premium equatorial mounts will find this model compelling.

Individuals who should probably skip this mount are those with very small, lightweight telescopes who might find its capabilities overkill and its weight a burden, or those on a very tight budget who might be better served by a less capable but more affordable option. For beginners, the learning curve, while manageable, might be steeper than with simpler alt-azimuth mounts. Essential complementary items would include a robust tripod (which is included and substantial), and for serious imagers, perhaps a good autoguiding setup, though the mount’s PEC can reduce its necessity for some.

Conclusion on Celestron CGEM II Computerized Telescope Mount

The Celestron CGEM II Computerized Telescope Mount strikes an impressive balance between advanced features, solid build quality, and a price point that makes it accessible to dedicated amateur astronomers. Its 40 lbs payload capacity and smooth, precise tracking capabilities, enhanced by features like Permanent PEC and Meridian tracking, make it a formidable tool for both visual enthusiasts and astrophotographers. The user-friendly design, particularly the intuitive polar alignment process and internal cabling, further enhances its appeal.

Considering its performance, durability, and the wealth of features offered, the $2099.00 price is justified for the capabilities it unlocks. The ability to securely handle larger scopes and provide stable, accurate tracking for extended imaging sessions represents significant value. I would personally recommend the Celestron CGEM II Computerized Telescope Mount to any amateur astronomer looking to elevate their observing and imaging experience, provided they have the budget and the optical tube to match its capabilities. It’s a mount that promises to grow with your astronomical ambitions.