iOptron CEM120 Center Balanced Equatorial Mount - 7300

Out of stock
SKU: IOP-7300
Regular price $6,923.00 CAD

Product details

  • SKU IOP-7300

iOptron CEM120 Center Balanced Equatorial Mount

The iOptron CEM120 Center Balanced Equatorial Mount was created by iOptron as a result of the growing demand for an accurate and stable equatorial mount with the versatility to carry larger instruments and more complex imaging arrays, with very high-performance specifications.

It offers the benefits of iOptron's revolutionary “center balanced” design: stability, accuracy, and smooth mechanical operation, while capable of carrying a payload up to 115 lb (52 kg). The “center balance” design’s natural stability is due to its focusing the mount along with any payload's weight directly over the center of the pier or tripod. The CEM120 performance is demonstrated by its low periodic tracking error of +/- 3.5 arcseconds and as low as < 0.15 arcsecond RMS for the (optional) EC model.

Along with stability, the CEM120 Center Balanced Equatorial Mount features an advanced cable management system consisting of more ports in more locations, preventing cable tangles and reducing the chance of fractured cables. It also adds some new features to the CEM family like Wi-Fi and LAN for remote operation and easy to use, reliable clutches on both axes. This product is the CEM 120 standard version mount.

NOTE: The photos show the CEM120EC model mount for illustration purposes, only. Your CEM120 mount will look similar to that shown in the photos, however it will have white colored knobs instead of red! This product's number is IOP-7300.

iOptron CEM120 Center Balanced Equatorial Mount Features:

  • A new design, center-balanced equatorial mount (CEM) for maximum payload with natural stability and advanced operating specs
  • Observatory astrophotography mount ideal for both visual observation and astrophotography applications
  • Payload of 115 lb (52 kg) with the mount weight of 57 lb (26 kg)
  • Easy to use and reliable gear clutches
  • Adjustable counterweight shaft for 0º latitude operation
  • Precision altitude and azimuth adjustment
  • Precision stepper motor with 0.07 arcsec accuracy for precise GOTO and accurate tracking
  • Polar alignment routine for those who can't see the Pole Star
  • Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology with built in heater
  • Permanent periodic error correction (PPEC); or real time PEC (RPEC) for the CEM120EC High Resolution model
  • Built-in 32-channel Global Positioning System (GPS)
  • Built-in Wi-Fi and LAN for remote operation
  • Integrated ST-4 auto guiding port
  • Advanced cable management system with more choices
  • Mount includes 2 counterweights (10 kg each)
  • Spring loaded, individually-adjustable Losmandy-style Saddle


Model: CEM120
Mount Type: CEM (Center balanced EQ Mount)
Payload (excluding CW): 52 kg(115 lb)
Mount Weight: 26 kg  (57 lb)
Payload per Mount Weight: 2X
Latitude Adjustment Range: 0~68° (0.5 arcmin divisions)
Azimuth Adjustment Range: ±5° (3 arcmin divisions)
Tracking Accuracy (PE): <±3.5 arcseconds
Period: 240 sec
Right Ascension Worm Wheel: 360 teeth, Diam. 216 mm, zero backlash
Declination Worm Wheel: 360 teeth, Diam. 216 mm, zero backlash
Worm: Diam. 26 mm
Right Ascension Axle: Diam. 80 mm, steel
Declination Axle: Diam. 80 mm, steel
Right Ascension Bearings: Diam. 125 mm
Declination Bearings: Diam. 125 mm
Counterweight Shaft: Diam. 38.1 mm x 540 mm (SS, none slip, 4.5 kg)
Counterweight: 10 kg (22 lb) x2
Mounting Base Dimensions: 210 mm x 230 mm
Motor: Precision Stepper Motor w/128 micro-step
Resolution: 0.07 arcsec
Hand Controller: Go2Nova 8407+; 8 line 21 character LCD
Power Req.: DC 12 Volts, 5 Amperes
Power Consumption: 0.7A (tracking), 1.8A (GOTO)
Polar Scope: Optional internal electronic polar scope
Meridian treatment: Stop (0-14° pass), flip
Zero position: Automatic zero search
Park position: horizontal, vertical, current, alt/azi input
Dovetail saddle: Losmandy D, 17.2" (437 mm)
Level Indicator: YES
Slew speed: 4°/sec (960x) max.
Guiding Port: ST-4
Serial Port: RS232, USB, LAN, WIFI
Cable Management: 2xDC12V (1A), DC5V(1A), 2xDC (5A), ST4, 6P6C, 4xUSB2.0, USB3.0 (powered), USB for PS, AUX
Pier/Tripod: Optional Pier Available from iOptron