ZWO AM3 Harmonic Drive Mount

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Strong Load Capacity:
-Without Counterweight: 8kg
-With Counterweight: 13kg

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

OUR PRICE $2,799.00
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    Features of the ZWO AM3 Harmonic Equatorial Mounts
    1. Featherweight Design - Weighing in at less than 4 kilograms, these innovative mounts redefine the meaning of lightweight convenience.
    2. Dual Mode Flexibility - Equatorial Mode and Altazimuth Mode offer versatile functionality for your stargazing adventures. Load capacity varies, supporting 8 kilograms without a counterweight and an impressive 13 kilograms with a counterweight.
    3. Intuitive Control - Seamlessly manage your telescope mount through the user-friendly hand controller or the dedicated app, all while staying connected via Wi-Fi. Access a comprehensive live star database at your fingertips.
    4. Counterweight-Free - Say goodbye to the cumbersome counterweights of traditional equatorial telescope mounts. Our AM series boasts a featherweight design that eliminates the need for counterweights.
    5. Precision in Motion - Experience unparalleled control with our innovative strain wave gear reducer and synchronous belt. Achieve an astonishing reduction ratio of 300:1, ensuring pinpoint accuracy in your astrophotography pursuits.

    Revolutionizing the Stargazing Experience

    Traditional equatorial telescope mounts can be a cumbersome hassle, requiring hefty counterweights and complex balancing. Transporting and storing them is no picnic, causing headaches for amateur astrophotographers venturing into dark sky territories.
    Enter the ZWO AM Mount series, engineered to address these challenges head-on.
    Our AM series shines with its counterweight-free design. Weighing a mere 3.9 kilograms, the ZWO AM3 mount boasts a substantial load capacity ranging from 8 kilograms to an impressive 13 kilograms.
    While portability is paramount, stability is equally essential. Rather than merely shedding mount weight, ZWO prioritizes stability in all conditions. Our internal structure incorporates the strain wave gear reducer and synchronous belt, guaranteeing precise control. It's a multifunctional marvel, serving as both an equatorial and altazimuth mount, controllable via Wi-Fi, Bluetooth, or the traditional hand controller.
    With a ZWO AM series mount, the struggle with counterweights becomes a thing of the past.

    Portability Meets Stability

    Our internal structure is optimized with the strain wave gear reducer and synchronous belt, offering impeccable control and an incredible reduction ratio of 300:1.

    Tailored Strain Wave Gear
    ZWO's strain wave gear is custom-crafted to meet the unique demands of astrophotography. It boasts minimal periodic error and robust torque. Each mount undergoes rigorous testing and comes equipped with a bespoke PE curve to ensure top-notch quality.

    Impressive Payload Capacity
    The ZWO AM3 shines with an 8-kilogram payload without the need for counterweights, extending to 13 kilograms with them. Ensure your counterweight bar does not exceed 20 centimetres in length for secure mounting.

    Equatorial or Altazimuth Mode
    Switch seamlessly between Equatorial and Altazimuth Modes using the ASI Mount App or the hand controller. Equatorial Mode is ideal for precise tracking and photography, while Altazimuth Mode enhances visual astronomy.

    Adjustable Pitch Angles
    Fine-tune your viewing experience with adjustable pitch angles. Gear 1 permits degrees between 0 and 60, while Gear 2 facilitates adjustments between 30 and 90 degrees after loosening the hex-head screw.

    Wireless Mastery
    Unlock a wealth of features, including Tonight's Target, GOTO, and Live Preview, all from your smartphone or tablet. Experience the freedom of wireless control.

    Harmonious Integration with ASIAIR
    For the ultimate astrophotography experience, ASIAIR seamlessly connects and controls the AM5 mount via wired or wireless connections, delivering unparalleled performance in the world of stargazing.


    Mount type

    Equatorial mount

    Mount mode

    Equatorial mode/ AltAzimuth mode


    Strain wave gear plus synchronous belt (reduction ratio 300:1)

    Periodic Error

    ± 20"

    PE duration


    Drive (RA)

    NEMA35 Stepper Motor + Model No. 14
    (Reduction ratio 100:1) + Brake

    Drive (Dec)

    NEMA stepper motor + Model No. 14

    Load Capacity

    8kg without counterweight - 13kg with a counterweight



    Lattitude adjustment range

    0-90 degrees

    Azimuth angle adjustment range 

    ± 10


    Losmandy & Vixen (500g)

    Interface thread of counterweight shaft


    Stepper motor resolution


    Max slew speed

    6 degrees south

    Slew rate

    0.5x, 1 x, 2x, 4x, 8x, 20x, 720x, 1440x

    Power port

    DC5.5-2.1 (12V-3A)

    Power consumption

    12V/0.38A (Standby)
    12V/0.58A (tracking)
    12V/1.7A (GOTO)

    Guide Port


    Communication interface


    Zero position


    Operating temperature


    Power failure protection



    About ZWO Optical: Astrophotography has never been easier

    Established in 2011, ZWO Optical is a fast-growing global astro imaging camera powerhouse based in Suzhou China. They focus on building and innovating groundbreaking CMOS cameras such as the iconic ZWO ASI120MM Monochrome CMOS camera (the first-ever planetary CMOS camera to beat a CCD in the early 2010s). ZWO continues to pioneer new astrophotography technology with revolutionary features to capture exceptional quality of images of space that will last you a lifetime.

    Today, ZWO cameras are recognised by every passionate astrophotographer and are available in over 25 countries internationally.

    Product Code: ZWO-AM3


    More Information
    Drive TypeGO-TO
    Dovetail TypeDual Saddle - Fits Vixen & Losmandy
    Motor TypeStepper
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