Recognizing the growing demand for an accurate and stable, equatorial mount with the versatility to carry larger instruments and more complex imaging arrays, we created the iOptron CEM120EC. It offers the benefits of our revolutionary “center balance” design: stability, accuracy, and smooth mechanical operation, while capable of carrying a payload up to 115 lbs (52 kg). The “center balance” design’s natural stability is due to its focusing the mount along with payloads weight directly over the center of the pier or tripod.
The CEM120EC’s performance is demonstrated by its low periodic tracking error of <0.15 arcsec RMS. Along with the stability aspect, the CEM120EC features an advanced cable management system consisting of more ports in more locations preventing tangle ups 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.
Optional heavy duty Tri-Pier 360 and Permanent Pier are available for order.
Features:
- A new design, center-balanced equatorial mount (CEM) for maximum payload with natural stability
- Observatory astrophotography mount ideal for both visual and Astro-photographers
- Payload of 115 lbs (52 kg) with the mount weight of 57 lbs (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
- Single high precision encoder on the RA axis
- High precision tracking with low periodic error (PE)<0.15 arcsec RMS
- Real time periodic error correction (RPEC)
- 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
PACKAGE CONTENTS:
Box 1 of 2: #7320-EC
- CEM120EC mount head x1
- Go2Nova 8407 V2 hand controller x1
- Hand controller cable x1
- Serial cable (#8412) x1
Box 2 of 2: #7325
- Counterweight shaft x1
- 10 kg counterweight x2
Technical Specifications:
| 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) |
| PE (by encoder) | < 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 |
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