iOptron CEM40 Computerized German Equatorial Telescope Mount

  • This ultra-quiet center-balanced equatorial mounts delivers precision tracking for superb astrophotography results
  • Built in iPolar Polar Alignment Camera
  • 40-pound Payload
  • Weighs only 15.8-pounds
  • Internal Cable management systems allows to connect an autoguider, and camera via USB, 12V Power, and ST-4 ports on the saddle
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  • Regular price $1,998.00

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iOptron CEM40 Computerized German Equatorial Telescope Mount

Introducing the CEM40, the next-generation in center-balance equatorial mounts.

With a red anodized CNC body, it looks sharp however its beauty is more than skin deep. The head weighs in at only 15.8-pounds yet can support a payload of up to 40-pounds. An integrated electronic polar finder scope (iPolar) ensures accurate alignment even at times when the pole star is obscured. Large levers on its quick-lock drive engagement system make it easy to snap its gears into place even when wearing gloves. There's little chance of your cables getting snagged with the CEM40's internal cable management system.

The CEM40 and CEM40EC incorporate iOptron's new, patent- pending Universal Self-Centering Saddle (USCS) it accommodates Losmandy and Vixen style dovetail plates. The CEM40 utilizes their ultra-quiet low power consumption stepper motor drive systems. Other features such as onboard GPS, 359,000+ object library with star identification make these extremely portable and capable mounts sure winners. 


Counterweight10 lb
Database359000 Objects
DEC Worm Wheel110mm Diameter 216 Teeth
Drive Typeprecision stepper motor
Free ShippingYes
Head DesignEquatorial
Instrument Capacity40 lb
Latitude Range0 to 60 Degrees
Mount Head Weight15.8lb
RA Worm Wheel110mm Diameter 216 Teeth
Slew Speed4.5°/sec (1080x)
Telescope ConnectionDual Vixen & Losmandy
Tracking AccuracyLess Than 7 Arcseconds
Tripod Weight15 lb


  • Mount Head
  • Counterweight Shaft
  • 10-pounds Counterweight
  • Go2Nova 8407 Hand controller
  • 1.5-inch Tripod


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5.0 Based on 1 Reviews
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Patrick M.
United States United States
Great mount

I wanted to get an EQ6 but they are not in stock anywhere so I got this mount instead. I am very happy with the performance, the iPolar made polar Alignment easy and extremely accurate. The wiring setup is perfect for someone that wants to do a lot of computer automation, USB right into the mount and not through the hand controller. With plate solving I feel less bad about skipping the encoder version. I am getting better than arc second tracking with a guide scope. Love it, works, and the finish is beautiful.