ZWO AM5N Harmonic Equatorial Mount with TC40 Tripod

The 33 lb. Grab-and-Go Harmonic Imaging Platform

The AM5N is engineered for the traveling astrophotographer who demands high payload capacity without the weight and complexity of traditional mounts. The 12.1 lb. mount head supports a full 33 lb. imaging rig without counterweights, making setup and transport remarkably simple. This kit pairs the mount with ZWO's TC40 carbon fiber tripod, creating a stable yet lightweight foundation for field use.

Designed for both visual observers and serious imagers, the AM5N operates in both Equatorial and Alt-Azimuth modes. This dual functionality, combined with its payload capacity and precise tracking, makes it a capable system for everything from quick visual sessions to automated, multi-night imaging projects.

Harmonic Drive System: High Torque and Zero Backlash

At the core of the AM5N is a strain-wave gear transmission paired with a synchronous belt drive. This drive gives stable transmission of large torque output, with a total reduction ratio of 300:1.

The drive's torque is what lets the mount carry up to 33 lb. without counterweights. The transmission is fully sealed, so the harmonic reducer does not rust over time and its performance remains consistent. Each AM5N is tested at the factory, and a unique periodic error performance sheet is included in the box.

Payload Capacity: 33 lb. Native, 44.09 lb. with Counterweights

The AM5N's standout feature is its power-to-weight ratio. It handles telescopes and imaging equipment up to 33 lb. (15 kg) without requiring a counterweight. This simplifies your setup and reduces total system weight, though ZWO still asks you to test how the center of gravity changes as the telescope turns, to avoid tipping.

For larger instruments or permanent installations, the capacity can be increased to 44.09 lb. (20 kg) by adding an optional counterweight shaft and weights (sold separately). The mount has an M12 x 1.75 threaded hole for attaching a counterweight shaft.

Tracking and GoTo: <±10" PE and 6°/s Slew Speeds

The AM5N's drive system, with its 300:1 reduction ratio, delivers tracking accuracy with a native periodic error of less than ±10 arcseconds over its 288-second cycle. Autoguiding corrects this error during long exposures. The stepper motor offers a resolution of 0.17 arcseconds for minute guiding corrections.

When moving between targets, the mount can slew at a maximum speed of 6° per second, reducing the time spent waiting for the telescope to center a new object. This high slew speed makes it efficient to build and execute multi-target mosaics and imaging plans.

Dual-Mode Operation: Switching Between Equatorial and Alt-Azimuth

The AM5N offers the flexibility of both Equatorial (EQ) mode for imaging and Alt-Azimuth (Alt-Az) mode for visual observation. Switching between modes is a straightforward process initiated with the hand controller before powering on the mount.

• To Enter Alt-Az Mode: With the mount powered off and the load removed, press and hold the 'CANCEL' button on the hand controller while turning the power on. Release the button once the status indicator light turns green. You then adjust the mount's latitude to 90°.
• To Enter EQ Mode: Follow the same procedure, but wait for the status indicator to turn red before releasing the button. You then set the mount's latitude to match your local latitude.

Universal Control: Hand Controller, Wi-Fi, Bluetooth, and ASCOM

The AM5N offers several control options. You can operate the mount using the included hand controller, a mobile device via Wi-Fi or Bluetooth, or a connected PC.

• Hand Controller: The included hand controller provides direct, physical control over slewing, tracking, and GoTo functions.
• Wi-Fi & Bluetooth: Connect wirelessly using a smartphone or tablet running ZWO's SkyAtlas or ASIAIR apps. This allows for full control without a PC, which suits portable setups.
• USB & ASCOM/INDI: A USB port provides a direct wired connection to a computer. With ASCOM and INDI support, the AM5N works with ASCOM-driver software such as ASIStudio, MaxIm DL, NINA and SGP.
• ST-4 Port: A standard ST-4 autoguide port allows direct connection of a guide camera for high-precision tracking corrections.

Field Support: Included TC40 Tripod and Pier Extension Options

This kit includes the ZWO TC40 carbon fiber tripod, so mount and tripod arrive together ready to assemble.

ZWO also offers optional pier extensions (PE160 and PE200, sold separately); the AM5N manual shows the pier extension fitted between the tripod and the mount head, raising the mount for more clearance between the optical tube and the tripod legs.

Power System: 12V 3A Operation with Power-Off Protection

The AM5N runs on a standard 12V DC power supply and requires a supply rated at 3A or more. If the input voltage drops below 10.8V, an audible alarm will sound, alerting you to a potential power issue.

The Right Ascension axis has brake protection in the event of a power failure. This power-off protection prevents the telescope from swinging uncontrollably, safeguarding your optical tube and camera from impact damage.

Mechanical Adjustments: A 0° to 90° Latitude Range

Engineered for use anywhere in the world, the AM5N features a latitude adjustment range from 0° to 90°. A two-gear system allows you to set the coarse range (0°-60° or 30°-90°), after which you can use the fine adjustment knob for precise polar alignment. The azimuth axis offers ±6° of fine adjustment for dialing in the final alignment.

Because the mount has no built-in polar scope, polar alignment is performed using software. Use a camera with polar alignment software, for example the ASIAIR's.

Portability and Transport: A 12.1 lb. Head with Hard Case

At 12.1 lb., the AM5N mount head is easy to handle and transport, and this kit includes a hard case for travel and storage. With the carbon fiber tripod and no counterweights needed up to 33 lb., the system is easy to carry to remote observing sites.

AM5N vs. AM5: Key Upgrades for Demanding Conditions

The AM5N is greatly improved over its original edition, with larger load capacity, higher precision, better low-temperature tolerance and better cable management.

• Enhanced Connectivity: ZWO's AM5N manual lists Bluetooth control from the SkyAtlas app, so the mount can be controlled even if you forget the hand controller.
• Cable Management: The dovetail saddle now includes integrated DC power and USB-C ports, allowing you to power and connect accessories such as an ASIAIR at the saddle, preventing cable snags.
• Low-Temperature Mode: A "low-temperature high-load mode" can be activated in the app to enhance the mount's load capacity in a low-temperature environment.