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iOptron CEM40EC Mount with 2" Tripod

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A Center-balanced Equatorial Mount with an Integrated Electronic Polar Finder Scope a Sturdy 2" Tripod.  Case Included! 



iOptron CEM40EC Mount with 2" Tripod

The iOptron CEM40EC mount with integrated + iPolar and 2-Inch Tripod is the next generation of Center-balanced Equatorial Mounts.

Weighing in at only 15.8-pounds, this mount can support a payload of up to 40-pounds.

This mount also has an Integrated Electronic Polar Finder Scope known as the iPolar. This tool ensures the accurate alignment of a telescope, even when the pole star is obscured. There are Large Levers on the quick-lock drive engagement system; these large levers make it easy to snap the gears into place.

Innovative Technology: Make way for an innovative mount! This iOptron CEM40EC mount uses iOptron's patent-pending Universal Self-Centering Saddle (USCS). This saddle accommodates Losmandy and Vixen-style dovetail plates. The CEM40EC also uses iOptron's ultra-quiet, low-power consumption stepper motor drive system, aiding the mount in providing precise tracking.

Computerized Mount Features:  The iOptron CEM40EC mount uses the Go2Nova 8407 hand controller to navigate the night sky. This incredible technology helps observers find celestial objects with the aid of the mount's 212,000+ object database!

With the included tripod, 10-pounds counterweight, and the mount's computerized technology, observers are just an OTA away from a spectacular viewing experience!


  • Unique design, Center-Balanced equatorial mount (CEM) for maximum payload and minimum mount weight
  • Idea for both visual observation and astrophotography
  • Maximum payload of 40 lbs (18 kg) with the mount weight of only 15.8 lbs (7.2 kg)
  • All metal, CNC machined with red/black anodized
  • Easy to use quick-lock gear clutches
  • Integrated iPolarTM electronic polar finder
  • Low periodic error ( PE< 0.25 arc seconds RMS)
  • Real-time periodic error correction with high resolution encoder (RPEC)
  • Precision stepper motor for precise GOTO and accurate tracking
  • Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology with built-in heater
  • Integrated ST-4 autoguiding port
  • 32-channel Global Positioning System (GPS)
  • USB communication port
  • Cable management system
  • New, patent-pending iOptron universal saddle
  • Standard 2 inch heavy-duty stainless steel tripod (8 kg)
  • Hard case included
  • Optional WiFi for mount control via SmartPhone/Tablet/Computer


Click on the Gallery Image to expand it and see the more complete scientific specifications.



Database212000 Plus Objects
DEC Worm Wheel110mm Diameter 216 Teeth
Drive TypePrecision Stepper Motor/ 1.8 Deg/ 128x MicroStep
Encoder Resolution0.08 arcsec (200 PPS)
Encoder TypeEQ North and EQ South
Free ShippingYes
Head DesignGerman Equatorial
Instrument Capacity40 lbs
Latitude Range0 ~ 60 Degrees
Mount Head Weight15.8lbs
Pointing Accuracy6 Arcseconds
PortsAutoguide ST_4
PortsUSB Communication
Power Consumption12V 5A
RA Worm Wheel110mm Diameter 216 Teeth
Slew Speed4.5 Deg/sec (1080x)
Telescope ConnectionDual Vixen & Losmandy
Tracking Accuracy<0.25 Arcseconds
Tracking RatesGoTo 0.9ArcSec
Tracking RatesTracking 0.6ArcSec
Tripod Weight7.6 lbs



  • iOptron CEM40EC Mount with Integrated iPolar Electronic Polar Finder 
  • Go2Nova 8407 and Hand Controller   
  • 32-channel GPS 
  • Cable Management System   
  • iOptron Universal Saddle   
  • 2-inch Heavy-duty Stainless Steel Tripod   
  • Hard Case   
  • 10-pound Counterweight 
  • iOptron Two-year Limited Warranty