Say goodbye to clunky counterweights and shafts—meet the HEM44 and HEM44EC, iOptron's game-changing mounts equipped with hybrid strain wave gear technology. These compact, lightweight mounts have the muscle to support a 44lb payload while tipping the scales at just 13.65lbs themselves. Thanks to iOptron's decades of expertise in precision mounts, that dream combo is now a reality.

When it comes to the tech inside, the HEM44 series knocks it out of the park. Its RA axis uses cutting-edge strain wave gears, paired with a backlash-free DEC worm/belt drive, delivering performance that's off the charts in terms of weight-to-payload efficiency. Sporting a black anodized, all-metal CNC machined body, this mount isn't just a looker—it's built to last.

But that's not all. The mount comes with nifty extras like an electronic friction brake and power-down memory. If the power cuts out, there’s no need to start over; the mount picks up right where it left off.

Control it your way: Windows PC users can opt for ASCOM/Commander, MacOS aficionados have third-party INDI driver options, and if you're more of a smartphone or tablet user, there's iOptron Commander Lite and apps like SkySafari. Raspberry Pi users, you're covered too, with INDI drivers.

For those craving even more precision, the HEM44EC version comes with a high-accuracy RA axis encoder, making it possible to capture images without even needing to guide.

Want a low-latitude range version? Special orders for 0~50 degree ranges are available.

So, what's the feature rundown?

Cutting-edge strain wave drive tech
Payload limit: 44 lbs, Mount weight: 13.65 lbs
Built from CNC machined metal
Electronic friction brake for safe stops during power loss
Gear period clocks in at 270 seconds
Real-time PEC with a high-precision encoder (RPEC)
Go2Nova® hand controller packed with ~212,000 objects
iPolar electronic polar scope for effortless polar alignment
No dangly cables, thanks to a built-in cable management system
Dual saddle compatible with both Vixen and Losmandy-D
Zero-position locator and search feature
Remembers its position and location even after power down
ST-4 autoguiding port integrated
Built-in Wi-Fi through the hand controller
USB port for updates and computer control
Aluminum travel case included
Backed by a two-year warranty

Wanna know more? Dive into the HEM44 mount details.

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 (25 kg)
Period	270 second
Drive motor	Stepper motor
Structure Material	All metal, CNC machined
Exterior finish	Anodized black
High precision encoder	Yes (RA)
PEC	Yes, Realtime PEC
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 HEM44EC Hybrid Strain Wave Gear Mount with High Precision Encoder

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