iOptron CEM26 Mount

CEM Design: A 2.6 Payload-to-Weight Ratio for Ultimate Portability

The core of the CEM26's design is its remarkable efficiency. By positioning the payload's center of gravity directly over the tripod, the CEM architecture delivers the stability of a much heavier mount without the physical burden. The mount head itself weighs only 10 lbs (4.5kg) yet confidently carries imaging rigs up to 26 lbs (12kg), resulting in an industry-leading payload-to-weight ratio of 2.60. This makes the CEM26 an ideal choice for astronomers who need a capable imaging platform that is easy to transport and set up at a dark sky site.

Precision Drive System: 144-Tooth Worm Wheels and <±12 Arcsecond PE

Accurate tracking is critical for astrophotography, and the CEM26 is engineered for precision. Both the right ascension and declination axes feature large Φ88mm, 144-tooth aluminum worm wheels driven by a 1.8º stepper motor with 128x micro-stepping. This combination yields a high resolution of 0.17 arcseconds for smooth tracking and precise guiding. The mount has a native periodic error of less than ±12 arcseconds, and its built-in Permanent Periodic Error Correction (PPEC) allows you to train the mount to reduce this error even further for unguided or long-exposure guided imaging.

Go2Nova Controller: A 212,000-Object Database with WiFi Control

Locating and tracking celestial targets is managed by the powerful Go2Nova® 8409 hand controller, which contains a database of approximately 212,000 objects. For modern, flexible control, the CEM26 features built-in Wi-Fi, allowing you to connect and operate the mount wirelessly from a smartphone, tablet, or computer. It also includes a direct USB port for a reliable wired connection to a PC for control via ASCOM drivers, an ST-4 compatible autoguide port for deep-sky imaging, and supports firmware upgrades to keep the system current.

Field-Ready Ergonomics: 0º to 60º Latitude Range and Quick Polar Alignment

Designed for practical use in the field, the CEM26 incorporates several features for a fast and painless setup. Its exceptionally wide latitude adjustment range of 0º to 60º ensures it can be polar aligned almost anywhere on Earth. Depending on the package, polar alignment is accomplished with either the AccuAlign™ optical polar scope or the highly-acclaimed iPolar™ electronic polar scope, which provides a fast, precise alignment through a simple software interface. Large, positive-locking gear clutches and a center-adjustable 3.8" Vixen-style dovetail saddle make balancing your telescope quick and secure.

iOptron CEM26 vs. Sky-Watcher HEQ5 Pro: A Modern Take on Portability

For years, the Sky-Watcher HEQ5 Pro has been a benchmark for mid-range equatorial mounts. While the HEQ5 is known for its robust, traditional German Equatorial design, the iOptron CEM26 offers a distinctly modern alternative focused on portability and integrated technology.

• Weight and Portability: This is the CEM26's defining advantage. Its 10 lb head weight is less than half that of the HEQ5 Pro's ~22 lb head, making the iOptron far easier to transport and set up without sacrificing capacity.
• Design and Efficiency: The CEM26's Center-Balanced design provides excellent stability for its weight. While the HEQ5 has a slightly higher payload capacity at ~30 lbs, the CEM26's 26 lb rating is achieved on a much lighter and more compact frame.
• Integrated Features: The CEM26 comes standard with built-in Wi-Fi for wireless control. The HEQ5 Pro requires an external Wi-Fi dongle for similar functionality.
• Latitude Range: The CEM26's 0º to 60º range offers greater flexibility for observers at very low or high latitudes compared to the HEQ5's more conventional range.