ZWO AM3N HARMONIC MOUNT (No Tripod)Strain Wave Gears for Precision Control Astrophotography demands both stability and accuracy, and the adoption of a custom engineered strain wave gear system addresses these needs directly. The gear train is designed to minimize periodic error, provide exceptionally smooth motion, and deliver high torque capacityfactors critical for long exposure imaging. Within the mount, a strain wave gear reducer works in concert with a synchronous belt drive,