The AM7 is ZWO’s highest-capacity harmonic drive telescope mount. It is built with heavier imaging rigs in mind, such as telescopes with long focal lengths, where tracking accuracy matters most.
The AM7 supports up to 20 kg without counterweights, and up to 30 kg with counterweights installed. That gives you room to run a serious setup now and still scale up later.
Tracking and GoTo
The goal is simple. Solid tracking and reliable GoTo under real payload, so you spend less time managing limits and more time imaging and exploring the night sky.
A Mount for the Long Haul
The AM7 handles both small and heavy setups, so you can grow into bigger telescopes without outgrowing your mount.
Built out of years of ZWO development and tuned for astrophotography, the AM7’s custom harmonic drive is designed for smooth, stable tracking with strong torque and consistent performance.
Every AM7 is individually tested before it ships. You get a unique periodic error curve report for your mount, so you can see the measured tracking performance of the exact unit you own.
Key specs and testing
Custom harmonic drive system
Total harmonic gear reduction ratio 300 to 1
Individual periodic error test report included
Periodic error controlled within plus or minus 10 arcseconds for dependable high precision tracking. (That’s the thickness of a human hair viewed from about 20 meters away).
 
Why Choose the AM7 Harmonic Equatorial Mount？
1. High capacity, two ways
Carries up to 20 kg with no counterweight. Up to 30 kg with a counterweight.
2.Precision you can verify
Periodic error is controlled within plus or minus 10 arcseconds, and every mount includes its own measured PE test report.
3.Cleaner setup, less mess
Built in USB C and DC power ports on the dovetail saddle help keep cables organized.
4.Two modes, one mount
Equatorial mode for tracking and imaging. Alt-azimuth mode for visual observing.
5.Works anywhere on Earth
Zero to 90 degrees altitude range means it can be used at any latitude worldwide.
6.Control the way you like
Bluetooth, Wi Fi, or the included hand controller.
7.Ready for cold nights
Rated down to minus 20 C.
8.A control system built for reliability
ZWO’s in house control system is designed for stable, dependable operation.
9.Portable by design
Despite its capacity, the mount weighs about 6.5 kg.
10.Backed by support and a global community
 
ZWO mounts are widely used by astrophotographers worldwide, with a strong user community and support network.