The iOptron CEM120 is built for serious astrophotographers and observers who want maximum stability and accuracy. This mount takes your sessions to the next level with a carrying capacity of 52 kg, an innovative centrally balanced design and advanced technology for error-free tracking.
Cleverly designed for perfect balance
The secret of the CEM120 lies in the centrally balanced design. The weight of your telescope rests directly over the center of the tripod or column, distributing the load evenly. The result? An exceptionally stable base that moves smoothly and vibration-free even in heavy setups.
Heavy loads, light operation
Despite its huge payload capacity of 52 kg, the mount itself weighs only 26 kg. The precise gear clutches make it easy to lock or unlock, even with gloves on. This means quick setup, smooth movement and less time wasted adjusting.
Designed for razor-sharp astrophotography
The stepper motors with 0.07 arc second accuracy ensure that your objects stay exactly in focus - ideal for long exposures and deep-sky photography. With permanent periodic error correction (PPEC) or real-time PEC (on EC models) tracking remains stable and error-free, recording after recording.
Operate your way
The CEM120 offers you ultimate freedom: control it via hand controller, Wi-Fi, LAN or PC (ASCOM). The built-in Go2Nova 8407 V2 system with more than 200,000 objects helps you find any target in the sky at lightning speed. And thanks to the built-in GPS and illuminated interface you work effortlessly even in total darkness.
Smart cable management for peace of mind in your setup
The integrated cable management system prevents entanglement and protects against breakage. All connections are right where you need them, keeping your setup tight and secure - important during nighttime sessions where every move counts.
Three versions, one performance standard
The CEM120 is available in three variants: the CEM120, CEM120EC (with encoder on RA axis) and CEM120EC2 (encoders on both axes). The EC models offer nearly error-free tracking even at the longest exposures.
Whether you're shooting from your backyard or working with a full-fledged observatory setup - the CEM120 gives you the control, precision and stability you need.
Specifications
General
| Feature | Description |
|---|---|
| Series | CEM120 |
| Type | Mount |
| Design | Equatorial |
| GoTo control | Yes |
| Software | Go2Nova 8407 V2 |
| Database | 212,000 objects |
| Language | English |
| Application | Photographic use |
Capacity
| Feature | Description |
|---|---|
| Max. load capacity | 52 kg |
| Counterweight | 2 × 10 kg |
| Mounting saddle | Losmandy-style |
Mechanical & Motor
| Feature | Description |
|---|---|
| Engine Type | Stepper motor (128 micro-steps) |
| Accuracy tracking | < ±3.5″ |
| Periodic error correction | Yes (permanent / real-time) |
| Wormwheel | Aluminum, 216 mm (360 teeth) |
| Wormas | Brass, 26 mm diameter |
| Shaft diameter (RA/DEC) | 80 mm |
| Ball bearing diameter | 125 mm |
| Propulsion mechanism | Gear / Worm gear |
Power Supply & Connectivity
| Feature | Description |
|---|---|
| Nutrition | 12V (adapter included) |
| Power consumption | 700-1800 mA |
| Interfaces | RS232, USB, LAN, Wi-Fi |
| PC control | Yes (ASCOM) |
| GPS | 32-channel built-in |
| Autoguider port | Yes (ST-4) |
Adaptation & Use
| Feature | Description |
|---|---|
| Height adjustment | 0°-68° |
| Azimuth fine adjustment | ±5° |
| Pole adjustment without a Pole Star | Yes |
| Level | Yes |
Other data
| Feature | Description |
|---|---|
| Tripod | Not included |
| Mounting weight | 26 kg |
| Total weight | 46 kg |
| Cable guide | Internal |
| Operation | Hand controller, PC, Wi-Fi, LAN |
| Suitable for | Astrophotography, observatory use |
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