iOptron CEM120 Equatorial Mount Discontinued

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iOptron CEM120 Equatorial Mount Discontinued   Discontinued
Item # IO-CEM120
  • The iOptron CEM120 center balanced equatorial mount is an innovative take on the original EQ mount design.
  • A centered balance greatly reduces the mount weight to load capacity ratio. The iOptron CEM120 weighs only 54.5 pounds (mount head only) but can carry an impressive 120 lbs.
  • Includes an illuminated AccuAlign polar finder and level indicator for an easy setup.
  • Smart design includes both RS232 and USB serial ports, WIFI integration, handy cable management and GPS.
  • D series saddle.
  • Initial deliveries expected late 2015. Place your order now to reserve an incoming mount and receive the earliest possible delivery!


iOptron CEM120 Center Balanced Equatorial Mount

Using a German equatorial mount as a template, the iOptron CEM mount series improves upon the original EQ design by centering the balance of mount.  This slight shift in the mount's center of gravity greatly increases stability and the mount weight to load capacity ratio.  The iOptron CEM120 mount boasts an impressive 2.2x weight to load ratio capable of carrying 120lbs. of equipment the mount head weighs a highly portable 54.5 lbs.  The additional benefits of a center balanced mount are reduced wear on the gears and bearings, and it allows the polar scope be available at all times since it is never blocked by the declination shaft. Fewer counterweights are needed to balance your gear with an improved neutral balance making the mount even more portable.


Mount Features & Specifications

  • Mount Design: Center Balanced Equatorial
  • Payload: 120 lbs.
  • Mount Weight: 54.5 lbs.
  • Latitude Range: 0-65 degrees
  • Azimuth Adjustment Range: +/- 6 degrees
  • Tracking Accuracy: < 7 arc seconds
  • RA Worm Gear: 360 tooth, 218.4mm diameter
  • DEC Worm Gear: 360 tooth, 218.4mm diameter
  • RA Axle: 80mm diameter, steel
  • DEC Axle: 80mm diameter, steel
  • Counterweight Shaft: Antislip design, 43mm diameter, 550mm length stainless steel
  • Counterweights: Steel, 10kg (22 lbs.)
  • Mounting Base Diameter: 203x203mm
  • Motor: 0.9º stepper motor w/ 128 micro-step
  • Resolution: 0.07 arcsec
  • Hand Controller: Go2Nova
  • Power: DC 12V 2A
  • Power Consumption: 0.6A (tracking), 1.4A (GoTo)
  • Polar Scope: AccuAlign with dark field illuminating
  • Transmission: Worm Direct Drive
  • Dovetail Saddle: 17.2" long D or Losmandy style
  • Level Indicator: Yes
  • Slew Speed: 5º/sec
  • Guiding Port: ST-4
  • Serial Port: RS232 and USB
  • Wireless Connection: WIFI
  • Network Connection: Ethernet
  • GPS: Yes
  • Cable Management: Yes
Additional Information

Additional Information

Head Design Equatorial
Tripod or Pier Included? No
GPS Included? Yes
Electronics Included Computerized - GoTo
Manufacturer iOptron
Warranty 1 Year Warranty
Hand Controller Included iOptron GoTo Nova
# of Counterweights Included 2
Weight of Counterweights 22 lbs. each
Tracking Rates Lunar, Sidereal, Solar
Mount Special Features Illuminated Control Panel, Illuminated Polar FInder, Integrated Bubble Level, Integrated Polar Finder
Saddle Width D Series
Weight Capacity 120 lbs.
Leg Length N/A
Material N/A
Power Supply Included DC Battery Adapter
Tracking Modes EQ North, EQ South
Weight of Tripod/Monopod 0º - 65º
Weight of Head 54.5 lbs.
Included Items

Included Items

  • CEM120 EQ Mount Head
  • Hand Controller
  • DC Adapter
  • 2x Counterweights
Questions & Answers

Product Questions

Will it be possible to add the enhanced encoders later?

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