iOptron CEM70EC2 with iPolar NUC version

The iOptron CEM70EC2 with NUC support is a powerhouse mount built for serious astrophotographers who want elite-level tracking performance, minimal cable clutter, and a fully integrated control system—all in a package that’s ready for remote automation or portable field use.

This mount combines the sub-arcsecond tracking accuracy of dual high-resolution encoders (RA and Dec) with the modular control flexibility of Intel NUC integration, letting you run your entire imaging rig from the mount head itself. Add in a 70-pound payload capacity, built-in iPolar alignment, internal cable management, and ultra-smooth stepper drive motors, and you’ve got one of the most complete, observatory-ready mounts available today.

Center-Balanced Power Meets High-Precision Control

At the heart of the CEM70EC2 is iOptron’s unique center-balanced equatorial design—a system that places your telescope’s payload directly over the center of the tripod or pier for better weight distribution, enhanced stability, and reduced torque. That design advantage allows the mount to carry an impressive 70 pounds of gear with ease, despite a relatively compact 30-pound mount head.

And while it shares its mechanical chassis with the rest of the CEM70 family, the EC2 version adds dual-axis Renishaw encoders—providing real-time error correction on both RA and Dec without the need for auto-guiding.

Dual Encoders: RA and Dec Tracking Perfection

The “EC2” in CEM70EC2 means encoder correction on both axes, and that’s what elevates this version to the top tier of tracking accuracy. These high-resolution magnetic encoders continuously monitor the exact position of the mount’s RA and Dec axes and feed those values into the drive control loop in real time. The result is a dramatic reduction in periodic and random error—whether you're guiding or not.

With RMS tracking errors routinely under 0.3 arcseconds, this mount can handle long-exposure imaging with large-pixel cameras and narrowband filters—even at long focal lengths—without sacrificing sharpness or wasting subs.

Built-In NUC Support: Imaging Without the Spaghetti

The CEM70EC2 NUC version includes a dedicated power and data port for mounting an Intel NUC mini computer (not included) directly to the mount head. That means your capture software, platesolving, guiding, and mount control all run from the mount itself—no external laptop, no dangling USB cables, and no accidental disconnects in the middle of the night.

This is particularly useful for permanent observatories and remote automation setups, where uptime and cable reliability are critical. Just connect to your NUC via remote desktop, and your entire imaging rig is ready to go.

iPolar Electronic Polar Alignment Built In

Fast and precise polar alignment is essential, and iOptron makes it simple with the included iPolar camera—built right into the mount head. This electronic polar scope uses plate solving to guide you through polar alignment with precision, even if Polaris isn’t visible. Setup is quick, intuitive, and doesn’t rely on reticles or guesswork.

Cable Management and Connectivity (No Wi-Fi)

The CEM70EC2 offers internal cable routing, multiple USB 3.0 ports, and 12V power outputs on the saddle and base—so you can power your camera, filter wheel, and accessories directly from the mount. While this version does not include Wi-Fi, control can be handled via the Go2Nova 8407+ hand controller, USB tether to your NUC, or third-party wireless options installed on your NUC.

This design keeps cables off the ground and out of your way—minimizing snags, improving balance, and allowing for full, uninterrupted slews.

Included Accessories

• CEM70EC2 mount head with dual-axis high-resolution encoders

• Integrated NUC connector (power + data)

• iPolar electronic polar alignment system (built-in)

• 48V power supply and cable

• Go2Nova 8407+ hand controller

• 20 lb counterweight and stainless steel counterweight shaft

• USB and data cables

• Hard carry case for the mount head

• Cable straps and documentation

Optional Accessories (Sold Separately)

• iOptron LiteRoc tripod or heavy-duty Tri-Pier

• Additional counterweights for heavier payloads

• Pier adapter for permanent installations

• Intel NUC mini PC

• Mini-pier extension

• Third-party Wi-Fi adapter (via NUC)

Final Thoughts

The iOptron CEM70EC2 with NUC support is a serious mount for serious astrophotographers. With true dual-axis encoder correction, Intel NUC integration, and a payload capacity that rivals much larger mounts, it’s a smart investment for those building a portable deep-sky rig or a remote observatory-grade platform.

You’ll spend less time troubleshooting cables and chasing errors—and more time collecting data you’ll be proud to stack and stretch.

Observing Tip:
Even if you're imaging without guiding, it’s still worth running short test exposures to check for differential flexure or slight polar misalignment. The CEM70EC2’s encoders handle tracking beautifully, but dialing in your mechanical setup can help you get the most out of every arcsecond.