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Introducing the HEM27 and the HEM27EC, iOptron’s revolutionary hybrid strain wave drive mounts. These light weight, high payload tiny titans will deliver an astronomy experience like never before. Imagine a mount head weighing in at 8.15lbs with a payload capability 29.74lbs, without needing a cumbersome counterweight or shaft. Applying iOptron’s multi decade experience creating precision mounts, the HEM27 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 HEM27s 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 include an electronic friction break to safely stop movement during a planned or unplanned power interruption.
A HEM27 mount can be controlled by a computer, either via ASCOM/Commander for a Windows PC or a third party INDI driver for a MacOS software; a SmartPhone/Tablet via iOptron Commander Lite or an App like SkySafari; or a Raspberry Pi device via INDI driver.
The HEM27EC features a high precision RA axis encoder that delivers incredible tracking accuracy, enough that many will choose to image “sans” guiding.
Learn more about HEM27 mount
HEM27 mounts with low latitude range (0~22 degree) are available via special order.
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Mount
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Hybrid Equatorial Mount
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RA gear system
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StrainWave 17
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DEC gear system
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Backlash-free worm/belt system
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RA reduction ratio
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480:1
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Payload w/o CW *
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29.74 lbs (13.5kg)
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Mount weight
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7.49lbs (3.4kg) w/o dovetail saddle
8.15lbs (3.7kg) with dovetail saddle
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Payload/Mount weight
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3.65
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Maximum payload with CW *
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44 lbs (20kg)
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Period
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360 second
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Drive motor
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Stepper motor
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Structure Material
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All metal, CNC machined
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Exterior finish
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Anodized black
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Latitude adjustment range
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15º ~ 65º
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Azimuth adjustment range
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± 5º
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Polar Scope
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iPolar electronic polar scope
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Level indicator
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Level bubble
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Control system
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GOTONOVA/Commander
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Hand Controller
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Go2Nova® 8409 with ~212,000 objects database
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Tracking
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Automatic
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Maximum slew speed
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6º/sec
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Power consumption
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0.5A(Tracking), 1A(GOTO)
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Power requiremention
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DC12V-5A (5.5/2.5mm DC plug)
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AC adapter
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100V ~ 240V (included, indoor use only)
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Cable
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No moving/wrapping
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Cable management
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2X12V (4A max.), 1X USB2.0
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Power off brake
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Electronic friction brake
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Wi-Fi
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Built-in
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Communication port
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Yes (Wi-Fi and USB)
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Autoguide port
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Yes (ST-4 compatible)
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Firmware upgrade
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Yes
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Dovetail saddle
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Vixen & Losmandy
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Tripod
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Optional
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Counterweight Shaft
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SS Φ20X200mm, M16 thread (Optional)
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Counterweight
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10 lbs (4.5kg)(Optional)
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Operation temperature
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-20ºC ~ 40ºC (hand controller -10ºC ~ 40ºC)
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Warranty
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Two year limited
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* 200mm, with payload center of gravity to the RA rotation axis. Or an OTA size of ~220mm.
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Features
- Advanced strain wave drive technology
- Payload capacity of 13.5 kg (29.7 lbs) with the mount weight of 3.7 kg (8.15 lbs)
- CNC machined
- Unique friction brake to safely stop movement during a planned or unplanned power interruption
- 360 second gear period
- Go2Nova® hand controller with ~212,000 object database
- iPolar electronic polar scope for easy and accurate polar alignment
- Cable management system, no hanging exterior cables to moving parts
- Dual saddle (Vixen and Losmandy-D styles)
- Built in zero position search and locator
- Integrated ST-4 autoguiding port
- Built-in Wi-Fi(via hand controller)
- USB port for firmware upgrade and computer control
- Soft carrying case
- Two year warranty
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Products
HEM27 Initial Review 
