ZWO AM3N Harmonic Equatorial Mount

ZWO AM3N Harmonic Equatorial Mount

ZWO AM3N strain-wave equatorial/alt-az mount, 8 kg payload without counterweight (13 kg with), 4.1 kg mount head.

The AM3N is ZWO's compact strain-wave (harmonic) mount: light enough to carry in one hand, yet it holds 8 kg without a counterweight and 13 kg with one. It is the improved second edition of the AM3, with more payload, better precision, better low-temperature behaviour and internal cable management.

A strain-wave gear with a synchronous belt (300:1) gives high torque with no meridian-flip balancing worries and, in most setups, no counterweight. It works in equatorial or alt-azimuth mode, has a power-off brake on the RA axis and a mechanical zero position, and is controlled by ASIAIR, the included hand controller, or a PC over USB, Wi-Fi or Bluetooth. Every mount ships with its own periodic-error test report.

Specifications

In the box

Mount, hand controller with 2 m cable, 2 m USB-B and 1 m USB-C cables, PE test report, quick guide, M6 hex key

Manufacturer documentation

• ZWO AM3N product page
• ZWO guides and manuals
• ZWO AM3N user manual (2026-04) – see the Attachments tab

Specifications from the manufacturer's manual, checked 2026-11-06. Supplier reference 87038.