ZWO AM3N Harmonic Mount
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ZWO AM3N Harmonic Mount is a Strain wave harmonic mount for guided astrophotography rigs.
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Specifications
Mount
- Mount type
- Strain wave harmonic mount
- Modes
- Equatorial / Alt-Azimuth
- Drive system
- Strain wave drive
Capacity
- Payload
- 8 kg / 17.6 lb without counterweight; 13 kg / 28.7 lb with counterweight
- Mount weight
- 4.1 kg / 9.04 lb
- Payload-to-weight ratio
- 3.2:1
Tracking
- Drive
- Strain wave gear + synchronous belt (300:1 reduction ratio)
- Periodic error
- <±15"
- PE duration
- 288 s
- Resolution
- 0.17"
- Max slew speed
- 6°/s
- Slew speeds
- 0.5×, 1×, 2×, 4×, 8×, 20×, 60×, 720×, 1440×
Setup
- Latitude range
- 0°-90°
- Azimuth range
- ±6°
- Dovetail saddle
- Losmandy & Vixen
- Counterweight shaft
- M12×1.75 coarse thread
Control
- Power
- DC 5.5×2.1 mm, center-positive 12V, no less than 3A
- Power consumption
- Standby 12V/0.65A; tracking 12V/0.8A; GoTo 12V/1.3A
- Communication
- USB / Wi-Fi / Bluetooth
- Guide port
- ST4
- Operating temperature
- -20 °C to 40 °C
Astrophotography Fit
A portable strain-wave mount that should be chosen by realistic imaging payload, not headline capacity alone.
ZWO AM3N Harmonic Mount is a premium Strain wave harmonic mount for computerized tracking and guiding. Rated payload: 8 kg / 17.6 lb without counterweight; 13 kg / 28.7 lb with counterweight.
For long-exposure astrophotography, use a conservative imaging payload. The telescope, camera, guide hardware, dew heaters, dovetails, and cables all count, and guiding performance matters more than the catalog payload number.
Strain-wave mounts are wonderfully compact, but they still need stiffness, cable discipline, and sometimes counterweighting to keep long tubes calm.
Best paired with
- Compact refractors, cooled cameras, and tidy cable-managed power
- Guiding from a guide scope or OAG for long exposures
- Tripod or pier with enough stiffness for the full imaging load
Not recommended for
- Ignoring counterweights on long or heavy optical tubes
- Tall, flexible tripods with high wind exposure
- Payloads near the marketing limit for long-exposure imaging
Retailer Rating
Ratings aggregated from public retailer data.
Retailer breakdown
| Retailer | Rating | Reviews | Source |
|---|---|---|---|
| Agena AstroProducts | 4.4 | 5 | Product page |
| High Point Scientific | 4.9 | 7 | Product page |
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Mile High Astronomy Mile High Astronomy | $39.95 | In stock Updated 9/20/2026 | View Offer - $39.95 |
| Agena AstroProducts Agena AstroProducts | $1,499.00 | In stock Updated 9/20/2026 | View Offer - $1,499.00 |
| Astronomics Astronomics | $1,499.00 | In stock Updated 9/20/2026 | View Offer - $1,499.00 |
| Cloud Break Optics Cloud Break Optics | $1,499.00 | In stock Updated 9/20/2026 | View Offer - $1,499.00 |
| High Point Scientific High Point Scientific | $1,499.00 | In stock Updated 9/19/2026 | View Offer - $1,499.00 |
| Starizona Starizona | $1,499.00 | In stock Updated 9/20/2026 | View Offer - $1,499.00 |
| Telescopes.net Telescopes.net | $1,499.00 | In stock Updated 9/20/2026 | View Offer - $1,499.00 |
| ZWO USA ZWO USA | $1,499.00 | In stock Updated 9/20/2026 | View Offer - $1,499.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.