Take your astrophotography to new heights with the EM31 Pro Harmonic Equatorial Mount. Designed for portability and performance, the EM31 Pro uses precision harmonic reducers and supports payloads up to 20 kg, making it an excellent option for both new and experienced astronomers.

Why choose the EM31 Pro?

The EM31 Pro offers exceptional versatility with support for German equatorial, side alt-azimuth, and top alt-azimuth modes. At just 4 kg, it provides a highly portable imaging or observing platform without sacrificing precision or stability.

Key features

• Lightweight and portable — weighs only 4 kg (excluding dovetail and adapter), ideal for travel or remote observing.
• Versatile payload capacity — up to 15 kg without a counterweight and up to 20 kg with one.
• Fine adjustment controls — azimuth range of −8° to +8° and micrometer-level latitude adjustment.
• High-performance motors — RA and DEC harmonic reducers provide smooth tracking and accurate slewing.
• Fast GoTo — maximum slewing speed of 6°/s for efficient target acquisition.
• Modern connectivity — includes USB 2.0, Wi-Fi, and Bluetooth for flexible control options.

Installation and setup

• Easy alignment — use German EQ mode for precision astrophotography or switch to alt-az for quick visual sessions.
• Polar calibration — compatible with plate solving, PoleMaster, and iPolar workflows.
• Flexible dovetail support — accommodates a wide range of telescope dovetail plates.

About Dark Clear Skies

Dark Clear Skies is the exclusive UK distributor of the EM31 Pro Harmonic Equatorial Mount, offering full support and guidance for astronomers looking to integrate this advanced mount into their setup.

Watch the EM31 Pro in action

Instruction manual

Download the EM31 Pro Instruction Manual (PDF)