iOptron HEM44A Hybrid Strain Wave Drive Mount with iPolar and Case

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Availability: More on the way

iOptron is changing the game again. The HEM44A Strain Wave mount looks to the future for performance today.
Our Product #: H442A
iOptron Product #: H442A
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Product Description

Say hello to the HEM44, iOptron’s revolutionary hybrid strain wave drive mount. The light weight, medium payload mount will deliver an astronomy experience like never before. Imagine a mount head weighing in at 13.65lbs with a payload capability of 44lbs, without needing a cumbersome counterweight or shaft. Applying iOptron’s multi decade experience creating precision mounts, the HEM44 brings this vision to reality.

Utilizing state of the art strain wave drive technology for the RA movement in tandem with backlash-free DEC worm/belt drive design, the HEM44s deliver unparalleled weight to payload efficiency. Its black anodized all metal CNC machined body is not only appealing to the eye, it’s a rugged platform that will perform at the highest level for many years to come. Unique features such as an electronic friction break and power down memory allow the mount safely stop and resume a GoTo slew or continue tracking even after an abrupt power loss (No need to realign and start from the beginning).

This is a head only.  You will need to purchase the 8061 carbon fiber tripod from iOptron as well.


  • Advanced harmonic drive technology
  • Payload capacity of 44lbs with the mount weight of 13.65lbs
  • CNC all metal machined body
  • Built in iPolar
  • Unique friction brake to safely stop movement during a planned or unplanned power interruption
  • 270 second gear period
  • Permanent periodic error correction (PPEC)
  • Go2Nova® hand controller with ~212,000 object database
  • Cable management system, no hanging exterior cables to moving parts
  • Dual saddle (vixen and losmandy-D styles)
  • Built in zero position search and locator
  • Power down position and location memory
  • Integrated ST-4 autoguiding port
  • Built-in Wi-Fi (via hand controller)
  • USB port for firmware upgrade and computer control
  • aluminum carrying case
  • Two year warranty
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.

Tech Details

Weight 14 pounds
Warranty 2 years


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