Manufacturer & Pricing
• Brand: ZWO (Zhen Wang Optics)
• Price (as of 2025): Around $1798 USD for the mount head only
Introduction
ZWO is a respected name in the astrophotography community, celebrated for its high-quality cameras, accessories, and innovative mount designs. The AM3N is a compact, harmonic-drive equatorial mount tailored for users seeking lightweight portability, automated precision, and quiet operation—ideal for both visual astronomy and deep-sky imaging. After several months of real-world use—both close to home and on the road—here’s a refined take on why the AM3N stands out and what to consider before opting in.
Key Features
· Harmonic Drive (Strain Wave Gearing) for high-precision tracking with negligible backlash
· Payload Capacity: Up to 8 kg (17.6 lb) without counterweight; Up to 13 kg (28.6 lb) with counterweight
· Portable Build: ~4.1 kg (9 lb) mount head, compact and travel-friendly
· Connectivity & Control: WiFi, Bluetooth, USB-C, hand controller, ASIAIR compatibility
· Cold Weather Ready: Works down to –20 °C
· Dual Mode: Easily switches between Alt-Az and EQ operation
· Ease of Use: Quick setup, simple operation, and dual-saddle for Vixen/Losmandy dovetails
· ZWO SkyAtlas App & ASIAIR Integration: Seamless use with ZWO’s mobile SkyAtlas app and ASIAIR for full automation and planetarium-based control
· ASCOM and INDI Compatibility: Works with most third-party astronomy software across Windows, Mac, and Linux
Performance & User Impressions
Tracking accuracy is consistently strong, with periodic error well within guiding tolerances. With autoguiding, subs of 5–10 minutes produce sharp, round stars. Noise levels are impressively low, making the mount ideal for quiet residential areas or remote campsites.
Users consistently highlight:
• Reliable guiding with small refractors and moderate SCTs
• Smooth wireless control via ASIAIR
• Intuitive setup and portability
Setup & Usability
Assembly is quick: mount to tripod (not included), connect power, and join via WiFi or Bluetooth. The companion app or ASIAIR makes it easy to connect and begin operating the mount. The learning curve is minimal for anyone familiar with modern GOTO systems.
The mount is extremely quiet when slewing and tracks smoothly. Firmware updates are simple and add extra stability or compatibility over time.
Pros
· Highly portable and lightweight
· Excellent tracking performance with harmonic gearing
· Versatile connectivity—WiFi, Bluetooth, USB-C, ASIAIR integration
· Quiet operation, perfect for residential or travel use
· Dual-mode operation (Alt-Az and EQ)
· Cord minimization and management reduces clutter during setup and imaging
Cons
· No built-in GPS
· No power supply included (must purchase separately)
· No built-in Go-To ability (must use compatible software or app)
· Fully dependent on power—cannot operate manually if the battery dies
· No traditional polar scope—alignment relies on software
Maintenance & Support
The harmonic drive requires almost no maintenance. Firmware updates are frequently released and easy to install. ZWO’s online community and support are responsive, and replacement parts like counterweight bars and adapters are widely available.
Field Experience Highlights
· Cold Weather Reliability: Operates smoothly below freezing with no stalls
· Travel Convenience: Fits in a backpack and handles well as carry-on luggage
· Stable Power Use: Can run mount and imaging gear off a single 12 V battery
Final Verdict
The ZWO AM3N Harmonic Equatorial Mount is an excellent balance of portability, performance, and modern features. It’s especially attractive for traveling astrophotographers, urban observers, and anyone who values wireless convenience and quick setup.
While the lack of GPS, bundled power supply, and manual override may be downsides, its quiet operation, reliable tracking, cord management, and seamless SkyAtlas/ASIAIR/ASCOM/INDI compatibility make it a compelling choice for both beginners and advanced imagers.
Best for: Portable astrophotography, dark-sky travelers, and users in the ZWO ecosystem.
Less ideal for: Those wanting a full-featured stand-alone mount (no ASI Air)
