ZWO AM5 Harmonic Equatorial Mount

OUR PRICE $3,599.00

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    Quick Overview
    Strong Load Capacity:
    -Without Counterweight: 13kg
    -With Counterweight: 20kg
    Multi-Function: Equatorial Mount, Alt-Az Mount
    Hand Controller + App Control: WiFi Connection, Live Star Database
    Precision Control: Harmonic drive speed reducer + synchronous belt
    Lightweight Design: No Counterweight Required

    Product details

    The traditional equatorial mount requires heavy counterweights for use. It’s normally very difficult to keep balance in RA and DEC directions, also inconvenient for transit and storage, which bring the astronomy amateurs a lot of pain when they are out for imaging.

    Some of the harmonic drive mounts are relatively simple in functions, insufficient in load capacity, also not very stable in use.

    Mount Body

    The internal structure of the body is optimized with the harmonic drive speed reducer and synchronous belt, bringing more accurate control and an amazing reduction ratio of 300:1.

    Astronomy-Dedicated Harmonic Drive Speed Reducer

    ZWO jointly developed with well-known domestic manufacturers to improve the harmonic drive speed reducer according to the actual needs of astrophotography. It comes with very low periodic errors, smooth gearing and high torque. The AM5 is born for astronomy.

    ZWO measures each mount and equip it with the exclusive PE curve before it leaves our factory. The X-axis represent drive angle. Y-axis represents periodic errors. The periodic error is stably controlled within±20 arc-seconds.

    5kg Mount Weight, Large Load Capacity

    While portability is very important, stability is also essential in use. We don’t blindly pursue the lightweight of the mount body; we are more so along the lines of stability for entire use.

    Load Capacity: 13kg – 20kg

    The capacity without the counterweight attached is 13kg, 20kg with counterweight.


    • Mount type: Equatorial mount
    • Mount mode: Equatorial mode/ Altazimuth mode
    • Drive: Harmonic drive+ Synchronous belt (Reduction ratio: 300:1)
    • Periodic error: <±20 II
    • PE duration: 432 S
    • Drive (RA): Harmonic NEMA42 stepper motor+ Model No. 17 (Reduction ratio: 100:1) + Brake
    • Drive (DEC): Harmonic NEMA35 stepper motor (Reduction ratio: 100:1) + Model No.17
    • Load capacity: 13kg without counterweight, 20kg with counterweight
    • Weight: 5kg
    • Latitude adjustment range: 0°-90°
    • Azimuth angle adjustment range: ±10°
    • Dovetail: Losmandy & Vixen 500g
    • Interface thread of counterweight shaft: Ml2
    • Stepper motor resolution: 0.17"
    • Max slew speed: 6°/S
    • Slew rate: O.5x, lx,2x,4x,8x,20x,60x, 720x, 1440x
    • Power port: DCS.5-2.1{12V-3A)
    • Power consumption: 12V / 0.386A {Stand by), 12V / 0.58A (Tracking), 12V / 1.SA {GOTO)
    • Guide port: ST4
    • Communication interface: USB/WiFi
    • Zero position: Mechanical
    • Operating temperature: -20°(-50°)
    • Power failure protection: Yes
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    AM5 mount body (Standard)
    Dovetail (Standard)
    Rocker Hand controller (Standard)
    Hand controller cable (Standard)
    Heightening part (Optional)
    Carbon fiber tripod (Optional)