iOptron HAZ71 Alt-Azimuth Strain Wave GoTo Mount
- 68 lbs (31 kg) payload capacity
- 18.3 lbs (8.3 kg) mount head weight
- 3.73 payload-to-weight ratio
- Strain Wave Gear system with 800:1 reduction
- Built-in Wi-Fi, GPS, and 11.1V rechargeable battery
The iOptron HAZ71 AZ SWG mount redefines portable, high-capacity observing by leveraging a Strain Wave Gear system to support a 68 lb payload on a mount head that weighs only 18.3 lbs. This remarkable 3.73 payload-to-weight ratio is achieved through an 800:1 reduction gear system that delivers backlash-free motion without the need for counterweights. With a built-in 11.1V battery, GPS, and Wi-Fi, the HAZ71 offers a complete, self-contained platform for serious visual astronomy and outreach.
At the core of the HAZ71 is its advanced strain wave gear (SWG) system on both axes. This technology, born from robotics, uses a flexible, tooth-engaged gear to achieve an enormous 800:1 reduction ratio, providing exceptional torque to handle heavy and off-center loads. For the astronomer, this means instant, backlash-free response when slewing and tracking, eliminating the frustrating gear slop common in traditional worm-drive systems.
The HAZ71's most significant advantage is its incredible power density. It can carry a 68 lb telescope rig, yet the all-metal, CNC-machined head weighs a mere 18.3 lbs. This 3.73 payload-to-weight ratio is class-leading and fundamentally changes how you approach a night of observing. Large SCTs or refractors that would typically demand a heavy, cumbersome equatorial mount can now be deployed on a lightweight, grab-and-go system.
Locating celestial targets is handled by the proven Go2Nova® 8409 hand controller, containing a database of approximately 212,000 objects. For modern wireless control, the HAZ71 features built-in Wi-Fi, allowing you to command the mount from your smartphone or tablet. Setup is further simplified by an integrated GPS, which automatically acquires your location, date, and time, ensuring accurate pointing right from the start of your session.
Designed for portability, the HAZ71 includes a built-in 11.1V, 4.4AH rechargeable Li-ion battery, eliminating the need for external power packs and trailing cables. This internal power source is sufficient for several hours of typical use. A key safety feature is the electronic friction brake, which automatically engages when the power is turned off, preventing your telescope from swinging freely and ensuring your equipment remains secure.
For a traditional German Equatorial Mount (GEM) to handle a 68 lb payload, it would require an equally heavy counterweight, bringing the total system weight to well over 100 lbs. The HAZ71 needs no counterweights, cutting setup time and physical strain dramatically. While its alt-azimuth design is primarily for visual use and EAA, it offers a level of convenience and portability for large instruments that no equatorial mount in its weight class can match.
The primary advantage of the Strain Wave Gear is its ability to deliver extremely high torque and precision with zero backlash in a very compact and lightweight package. This allows the 18.3 lb HAZ71 head to carry a 68 lb payload without needing any counterweights, making it exceptionally portable for its capacity.
As an alt-azimuth mount, the HAZ71 is subject to field rotation, which makes it unsuitable for unguided, long-exposure deep-sky imaging. It is designed primarily for visual astronomy, public outreach, and Electronically-Assisted Astronomy (EAA) where many short exposures are stacked to create an image.
The 11.1V, 4.4AH Li-ion battery's duration depends on usage. With continuous tracking, it will last for many hours. Frequent slewing at the maximum 6°/sec speed will consume more power. For a typical visual observing session with moderate GoTo use, you can expect a full evening of operation on a single charge.
Yes, absolutely. With its 68 lb payload capacity, the HAZ71 is an excellent match for large Schmidt-Cassegrains like a Celestron C11 or even a C14 for visual observing. It can also easily handle large refractors or Newtonian reflectors, provided they fit within the weight limit. The dual Vixen/Losmandy saddle accommodates most telescope mounting plates.
The built-in GPS automatically sets your precise location and time, which is critical for the GoTo system to accurately find objects like Jupiter and Saturn. The built-in Wi-Fi allows you to control the mount with a planetarium app on your phone or tablet, making it easy to look up information about the planets and slew to them with a simple tap on the screen.
No. Thanks to the high-torque strain wave gear drive, the HAZ71 does not require any counterweights, even when loaded to its full 68 lb capacity. This is a major factor in its portability and rapid setup time compared to traditional equatorial mounts.
| Mount Type | Strain Wave Altazimuth Mount |
| Drive System | Strain Wave Gear (RA & DEC) |
| Reduction Ratio | 800:1 |
| Payload Capacity | 68 lbs (31 kg) |
| Mount Weight | 18.3 lbs (8.3 kg) with dovetail saddle |
| Payload to Mount Weight Ratio | 3.73 |
| Drive Motor | Stepper motor |
| Structure Material | All metal, CNC machined |
| Dovetail Saddle | Vixen & Losmandy dual saddle |
| Control System | GoToNova® Commander |
| Hand Controller | Go2Nova® 8409 with ~212,000 object database |
| Maximum Slew Speed | 6°/sec (Azimuth), 3.6°/sec (Altitude) |
| Power Consumption | 0.7A (Tracking), 1.7A (GoTo) |
| Power Source | Built-in rechargeable Li-ion battery (11.1V, 4.4AH) |
| Battery Charger | 100-240V AC input / 12.6V DC 2A output |
| Safety Brake | Power-off electronic friction brake |
| GPS | Built-in |
| Wi-Fi | Built-in |
| Communication Ports | Wi-Fi and USB (via Hand Controller) |
| Mounting Base | 3/8"-16 threaded hole |
| Level Indicator | Level bubble |
| Operating Temperature | -20ºC ~ 40ºC |
| Exterior Finish | Anodized black |
| Tripod/Pier | Optional |
| Firmware Upgradeable | Yes |
| Gross Weight (Shipping) | 29 lbs |
| Shipping Dimensions | 17 x 15 x 9 inches |