iOptron CEM120 EC2 Equatorial Mount with Dual Optical Encoders – Ref. 7302

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.

.

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 :

Tripod Option