CEM40 (7400)
CEM40 (7400)
CEM40 (7400)
CEM40 (7400)


CEM40 (7400)

Regular price
$ 2,448.00
Sale price
$ 2,448.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

Need more versatility of an equatorial mount without cable tangling? Tired of connection error with some third party control interface? iOptron NUC-ready mounts are coming! A CEM40-NUC is ready to mate with Intel® NUC minicomputer (thickness≤38mm) at the front of dovetail saddle seamlessly with the cable management system.


Introducing the CEM40 & CEM40EC next-generation, center-balance equatorial mounts. The CNC body looks sharp however its beauty is more than skin deep. The head weighs in at only 15.8 lbs. yet can support a payload of up to 40 lbs. 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 our new, patent- pending Universal Self-Centering Saddle (USCS) it accommodates Losmandy and Vixen style dovetail plates. Both The CEM40 and the CEM40EC utilize our ultra-quiet low power consumption stepper motor drive systems. Both models are precise trackers, the EC version delivering <0.25 arcsecond accuracy with its high-resolution encoder. Other features such as onboard GPS, 359,000+ object library with star identification make these extremely portable and capable mounts sure winners.


  • Unique design, center-balanced equatorial mount (CEM)
  • Ideal for both visual observation and astrophotography
  • Large easy to use quick-lock gear clutches
  • Integrated iPolar electronic polar finder
  • Max payload of 40 lbs (18 kg) with the mount weight of only 15.8 lbs (7.2 kg)
  • Precision stepper motor for precise GOTO and accurate tracking
  • Go2Nova 8407+ controller with advnaced GOTONOVA GOTO technology with built in heater
  • Permanent periodic error correction (PPEC) on the CEM40 or real time PEC (RPEC) for the CEM40EC
  • Built-in 32-channel Global Positioning System (GPS)
  • Integrated ST-4 auto guiding port
  • Advanced cable management system with more choices
  • New, patent-pending iOptron self centering saddle
  • WiFi with optional external adapter
  • CNC machined metal body
  • Includes tripod, optional Tri-Pier available


Manufacture iOptron
Model CEM40/CEM40EC
Mount Type Center-Balanced Equatorial Mount
Payload (excl. CW) 18 kg (40lbs), exclude counterweight
Mount Weight 7.2 kg (15.8lbs)
Payload/Mount Weight 2.5
Structure Material All metal, CNC Machined
Exterior Finish Anodized red/black
Latitude Adjustment Range 0°-60° (special CW shaft mounting if < 10°)
Azimuth Adjustment Range +/-6°
Tracking Accuracy (PE) < +/-7 arcsec / <0.25 arcsec RMS (EC)
Period 400 sec
Worm Diameter 17mm
Right Ascension Worm Wheel 216 teeth, 110mm, zero backlash
Declination Worm Wheel 216 teeth, 110mm, zero backlash
Right Ascension Axle 45mm, steel
Declination Axle 45mm, steel
Right Ascension Bearings 68mm
Declination Bearings 68mm
Counterweight Shaft 20x410 mm (SS, 7 kg)
Counterweight 4.5 kg (10lbs) x 1
Mounting Base Diameter 125mm
Motor Precision stepper motor, 1.8°/128 micor-step
Motor Resolution 0.08 arcsec (200 PPS)
Hand Controller Go2Nova 8407+; 8 line 21 character LCD
Star Database 359,000+, star identification
Power DC 12V, 5A
Power Consumption 0.6A (tracking), 0.9A (GOTO)
Polar Scope Internal iPolar electronic polar scope
Meridian Treatment Stop (0-10° pass), flip
Zero Position Automatic zero search
Dovetail Saddle iOptron Universal saddle, 5"
Max Slew Speed 4.5°/sec (1080x)
PEC PPEC/Real time PEC (CEM40EC)
Guiding Port ST-4
Communication Port USB
WiFi External (optional)
Cable Management DC12V (3A), ST4, USB
Tripod 1.5" (none, 2" or tripier optional)
Hardcase CEM40EC standard, CEM40 optional

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