iOptron CEM120 EC2 Center Balanced EQ Mount with Dual High End Encoders

  • 115 lbs payload capacity
  • Tracking accuracy of less than 0.15 arcsec RMS
  • 12 port cable management saddle
  • LAN, RS232, USB and Wifi Control options for remote observatory setups
  • Built-in 32 Channel GPS 
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  • Regular price $6,998.00

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iOptron CEM120 EC2 Center Balanced EQ Mount with Dual High End Encoders

With the growing demand for accuracy, heavy capacity, stability, and versatility in an equatorial mount, iOptron created the CEM120 to meet all these needs. The CEM 120 like all center balance designs are naturally stable is due to putting the weight of the telescopes directly over the center of the pier or tripod.

The mount’s performance is demonstrated by its low periodic tracking error that is less than 0.15 arcseconds RMS. The CEM120 features an advanced cable management system consisting that prevents tangle ups and reduces the chance of fractured cables. It also adds some new features to the CEM family like Wi-Fi and LAN for remote operation.

The CEM120EC2 has fixed home sensors on each axis. Because of this alignment models are saved and can be reused on future nights as long as the mount is not physically altered after power off. It also can be “homed” through software if position is lost.


  •  iOptron has known issues with their high resolution encoders on this mount and are working on a firmware update. Please contact us for updates on the issue before purchasing.


Azimuth Range Plus or minus 5 degrees
Dec Worm Wheel216mm/360 teeth
Free ShippingYes
Head DesignGerman Equatorial
Instrument Capacity115 lbs
Latitude Range 65 degrees
Mount ElectronicsComputerized/ GoTo
Power Consumption1.8A
RA Worm Wheel216mm/360 teeth
Saddle WidthD Series
Tracking ModesEQ North & EQ South
Tracking RatesLunar & Sidereal & Solar
Warranty2 Year Warranty
weight capacity115 lbs.
weight57 lbs.
Worm Period240 seconds


  • CEM120EC2 mount head x1
  • Go2Nova 8407 V2 hand controller x1
  • 10 kg counterweight x2
  • Counterweight shaft x1
  • Hand controller cable x1
  • Serial cable (#8412) x1
Liquid error: internal