iOptron CEM40-EC with High Precision Encoders on Tripod

iOptron CEM40-EC with High Precision Encoders on Tripod: precision mount with RA encoder, tripod, and case

The iOptron CEM40 is a centrally-balanced equatorial GoTo mount with a payload capacity of 18 kg (40 lbs) excluding counterweight, at a head weight of only 7.2 kg (15.8 lbs). The weight of the mount and telescope rests directly above the center of the tripod, giving a remarkably quiet and stable setup.

The EC version corrects the periodic error in real time via a high-resolution encoder on the right ascension axis, down to under 0.25 arcsecond RMS. Autoguiding is often unnecessary at short and medium focal lengths.

In addition to the tripod, this set also includes the transport case, ensuring the precision head travels safely to dark locations.

Real-time error correction on the RA axis

The encoder continuously measures the axis movement and makes immediate adjustments: sharp stars in long, unattended exposures, without a guiding camera and extra cables.

For long focal lengths, classic autoguiding via the ST-4 port remains possible.

GoTo, GPS, and heated handgrips

The Go2Nova 8407+ hand controller contains a database of over 200,000 objects and has a built-in display heater, so the screen remains readable even in freezing temperatures. The 32-channel GPS in the mount automatically sets the time and position.

Computer control is via USB. Wireless control with SkySafari or ASCOM is possible with the optional iStarFi WiFi module. An ST-4 port is ready for autoguiding.

Accurate and quiet mechanism

Low-consumption stepper motors control both axes. The periodic error remains within plus or minus 7 arcseconds and can be further reduced with recording PPEC.

The dual saddle accommodates Vixen and Losmandy rails, the large geared clutch levers also work with gloves on, and internal cable management keeps the setup tidy.

Included

• CEM40-EC mount head with RA encoder and built-in iPolar
• Go2Nova 8407+ Handheld Controller with Display Heating
• Tripod
• Mounting head transport case
• Network adapter and USB cable

Featured accessories

Add the iStarFi WiFi module for wireless control and the 15cm MiniPier for clearance around the zenith.

For whom yes and for whom no

• ✓ Traveling astrophotographers who want encoder precision complete with a carrying case
• ✗ Pure visual observers: the standard CEM40 will suffice then

Specifications

You can find more mounts and accessories for this brand at the iOptron brand page.