iOptron CEM120 EC2 Equatorial Mount with Dual Optical Encoders – Ref. 7302
7,990.00
Tax included
iOptron CEM120 EC2 Equatorial Mount with Dual Optical Encoders – Ref. 7302
Center-balanced equatorial mount with high-resolution optical encoders on both RA and DEC axes. Tracks at ≤ 0.15” RMS. Built-in position sensors allow alignment memory. Supports 52 kg payload. Ideal for fixed or remote observatories.
Monture iOptron CEM120EC2 GoTo Dual High Precision Encoder
Description :
The iOptron CEM120 EC2 is a high-end equatorial mount designed for demanding astrophotography and observatory applications. It features high-resolution optical encoders on both the right ascension (RA) and declination (DEC) axes, paired with internal position sensors that allow the mount to retain alignment and pointing models even after power is turned off.
This configuration enables precise sidereal tracking with a typical periodic error under ±0.15 arcseconds RMS, and allows automatic resumption of sessions without realignment.
With a payload capacity of 52 kg, it supports heavy and complex imaging systems. The patented Center-Balanced Equatorial Mount (CEM) design improves weight distribution, reduces torque stress on the motors, and increases overall mechanical stability.
The CEM120 EC2 offers full connectivity (USB, RS-232, Ethernet, Wi-Fi) and is compatible with all major astrophotography platforms, including ASCOM, INDI, NINA, SkyX, MaximDL, and PHD2.
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Features:
- Center-balanced equatorial mount (CEM) for maximum payload with natural stability
- Payload of 52 kg with the mount weight of only 26 kg
- Easy to use and reliable gear clutches
- 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 V2 controller with Advanced GOTONOVA® GOTO Technology with built in heater
- Permanent periodic error correction (PPEC) or real time PEC for the CEM120EC and CEM120EC2
- 32-channel Global Positioning System (GPS)
- Built-in WiFi and LAN for remote operation
- Integrated ST-4 autoguiding port
- Advanced cable management system with more choices
- Spring loaded, individual adjustable Losmandy saddle
User Benefits
Optical encoders on both axes for high-precision tracking
Internal sensors allow position memory after power-off
Supports complex imaging setups up to 52 kg
Balanced design improves stability and reduces wear
Full automation and remote access capability
The iOptron CEM120 EC2 is a high-end equatorial mount designed for advanced users who require exceptional tracking precision, alignment memory, and workflow continuity. It features dual high-resolution optical encoders, one on each axis, allowing real-time, nearly error-free tracking and dual-axis correction.
With advanced sky modeling, the EC2 version can compensate for polar misalignment and atmospheric refraction changes, enhancing pointing and tracking accuracy. Fixed home sensors on both axes allow the mount to retain alignment models even after shutdown, making it ideal for remote observatories and automated imaging systems that demand stability, scalability, and consistent performance.
The CEM120 is available in three versions:
CEM120 (standard)
CEM120EC (RA encoder only)
CEM120EC2 (encoders on both RA and DEC axes)
Spécifications :
| Mount | Center-balanced Equatorial Mount (CEM) |
| Payload | 52kg (115 lbs), exclude counterweight* |
| Mount weight | 26kg (57 lbs) |
| Payload/Mount weight ratio | 2 |
| Material | All metal |
| Latitude adjustment range | 0°~ 68° (0.5 arcmin division)** |
| Azimuth adjustment range | ± 5° (3 arcmin division) |
| Tracking accuracy (PE) | < 0.15 arcsec RMS |
| Worm period | 240 sec |
| PEC | Real time PEC (RPEC) |
| Right Ascension worm wheel | Φ216mm, 360 teeth, zero backlash |
| Declination worm wheel | Φ216mm, 360 teeth, zero backlash |
| Worm | Φ26mm |
| Right Ascension axle | Φ80mm, steel |
| Declination axle | Φ80mm, steel |
| Right Ascension bearings | Φ125mm |
| Declination bearings | Φ125mm |
| Counterweight shaft | Φ38.1x 540 mm (SS, anti-slip, 4.5kg) |
| Counterweight | 10 kg (22 lbs) |
| Mount base size | 210 x 230 mm |
| Motor drive | Precision stepper motor w/128 micro-step |
| Encoder Resolution | 0.035 arc seconds |
| Motor Resolution | 0.07 arc seconds |
| Slew speed | 4°/sec (960x) max. |
| Hand Controller | Go2Nova® 8407 V2, 8 line 21 character LCD |
| Power requirement | DC 12V, 5A |
| Power consumption | 0.7A(Tracking),1.8A(GOTO) |
| Polar Scope | Optional electronic polar scope |
| Meridian treatment | Stop (0-14° pass), auto flip |
| Zero position | Automatic zero search |
| Park position | Horizontal, vertical, current, alt/azi input |
| Level indicator | YES |
| Dovetail saddle | Losmandy D, 17.2" (437mm) |
| GPS | YES |
| Guiding port | ST-4 |
| Communication 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 |
| Warranty | Two year limited |
Tripod Option
Ioptron CEM120 EC2
Specific References
- UPC
- 7302
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iOptron CEM120 EC2 Equatorial Mount with Dual Optical Encoders – Ref. 7302
Center-balanced equatorial mount with high-resolution optical encoders on both RA and DEC axes. Tracks at ≤ 0.15” RMS. Built-in position sensors allow alignment memory. Supports 52 kg payload. Ideal for fixed or remote observatories.