Say goodbye to bulky counterweights and shafts—meet the HEM44 and HEM44EC, the latest game-changers from iOptron. These compact, medium payload beasts weigh just 13.65lbs but can handle a 44lb payload, no counterweight needed. Thanks to iOptron's decades of expertise, these mounts are a breakthrough in precision astronomy.

At the core, these mounts use cutting-edge strain wave gear tech for the RA movement, paired with a backlash-free DEC worm/belt drive. This gives the HEM44 series an unmatched weight-to-payload ratio. Built with a sleek, black anodized, all-metal CNC machined body, these mounts aren't just eye candy—they're built to last.

Got a power outage? No stress. Unique features like an electronic friction brake and power-down memory let your mount safely pause and pick up where it left off. No need to start from scratch.

Control your HEM44 mount using various options: a Windows PC via ASCOM/Commander, MacOS through third-party INDI drivers, smartphone/tablet via iOptron Commander Lite or apps like SkySafari, or even a Raspberry Pi via INDI driver.

Go for the HEM44EC if you want ultra-precise RA axis tracking—so good, you might ditch manual guiding altogether.

Need low-latitude options? We got you covered with special orders for 0~50-degree latitude ranges.

Feature Rundown:

Next-gen strain wave drive tech
44lb payload on a 13.65lb mount
CNC machined for durability
Unique electronic friction brake for safe stops during power issues
270-second gear period
Go2Nova® hand controller loaded with ~212,000 celestial objects
iPolar electronic polar scope for simple, precise alignment
Cable management: no messy, hanging cables
Dual saddle compatible with Vixen and Losmandy-D
Zero position locator
Power down memory feature
Integrated ST-4 autoguiding port
Built-in Wi-Fi via hand controller
USB for firmware and computer control
Aluminum carrying case
2-year warranty

Interested? Learn more about the HEM44 mount.

Specifications

Mount	Hybrid Strain Wave Equatorial Mount
RA gear system	StrainWave
DEC gear system	Backlash-free worm/belt system
RA reduction ratio	640:1
Payload w/o CW *	44 lbs (20 kg)
Mount weight	13lbs (5.9kg) w/o dovetail saddle 13.65lbs (6.2kg) with dovetail saddle
Payload/Mount weight	3.23
Payload with CW*	55 lbs (25kg)
Period	270 second
Drive motor	Stepper motor
Structure Material	All metal, CNC machined
Exterior finish	Anodized black
Latitude adjustment range	15º ~ 65º
Azimuth adjustment range	± 6º
Polar Scope	iPolar electronic polar scope
Level indicator	Level bubble
Control system	GOTONOVA/Commander
Hand Controller	Go2Nova® 8409 with ~212,000 objects database
Tracking	Automatic
Maximum slew speed	4.5º/sec
Power consumption	0.6A(Tracking), 1.2A(GOTO)
Power	DC12V-5A (5.5/2.5mm DC plug)
AC adapter	100V ~ 240V (included, indoor use only)
Cable	No moving/wrapping
Cable management	2X12V (4A max.), 1X USB2.0
Power off brake	Electronic friction brake
Power-down memory	Yes
Wi-Fi	Built-in
Communication port	Yes (Wi-Fi and USB, via HC)
Autoguide port	Yes (ST-4 compatible)
Firmware upgrade	Yes
Dovetail saddle	Vixen & Losmandy
Tripod	Optional
Counterweight Shaft	SS Φ20X200mm, M16 thread (Optional)
Counterweight	10 lbs (4.5kg)(Optional)
Operation temperature	-20ºC ~ 40ºC (hand controller -10ºC ~ 40ºC)
Warranty	Two year limited

* 200mm, with payload center of gravity to the RA rotation axis. Or an OTA size of ~220mm.

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iOptron HEM44 Hybrid Strain Wave Gear Mount with iPolar

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