{"id":32748,"date":"2025-11-07T11:24:24","date_gmt":"2025-11-07T10:24:24","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=32748"},"modified":"2026-08-25T15:11:03","modified_gmt":"2026-08-25T13:11:03","slug":"ioptron-cem40-ec-goto-high-precision-encoder-with-stativ-40mm","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/ioptron-cem40-ec-goto-high-precision-encoder-met-stativ-40mm\/","title":{"rendered":"iOptron CEM40-EC with High Precision Encoders on Tripod"},"content":{"rendered":"

iOptron CEM40-EC with High Precision Encoders on Tripod: precision mount with RA encoder, tripod, and case<\/strong><\/h2>\n\n\n\n

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.<\/p>\n\n\n\n

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.<\/p>\n\n\n\n

In addition to the tripod, this set also includes the transport case, ensuring the precision head travels safely to dark locations.<\/p>\n\n\n\n

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Real-time error correction on the RA axis<\/strong><\/h4>\n\n\n\n

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

For long focal lengths, classic autoguiding via the ST-4 port remains possible.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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GoTo, GPS, and heated handgrips<\/strong><\/h4>\n\n\n\n

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.<\/p>\n\n\n\n

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.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Accurate and quiet mechanism<\/strong><\/h4>\n\n\n\n

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.<\/p>\n\n\n\n

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.<\/p>\n<\/div>\n<\/div>\n\n\n\n

Included<\/strong><\/h3>\n\n\n\n