iOptron HEM27EC Hybrid Harmonic Drive Equatorial Mount with HP RA Encoder & iPolar - No Tripod - H274A
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Introducing the iOptron HEM27EC, a revolutionary hybrid harmonic drive equatorial GoTo mount that includes an upgraded high precision RA axis encoder for incredible tracking accuracy with Real Time RPEC.
All versions of the iOptron HEM27 harmonic mount are light weight, high payload tiny titans that will deliver an astronomy experience like never before. Imagine a mount head weighing in at just 8.15 lb. but with a payload capability 29.74 lb., and without the need for a cumbersome counterweight or counterweight shaft!
Utilizing state of the art harmonic drive technology for the RA movement in tandem with backlash-free DEC worm/belt drive design, the iOptron HEM27EC delivers 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 to 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).
The HEM27EC package features a high precision RA axis encoder that delivers incredible tracking accuracy, enough that many will choose to image “sans” guiding and comes with iPolar, an electronic polar scope for easy and accurate polar alignment. Other optional HEM27 models include the base version (H272) or the base version with iPolar (H272A). Only the HEM27EC (H274A) comes with the high precision RA encoder.
Features
- Advanced harmonic drive technology
- Payload capacity of 13.5 kg (29.7 lbs) with the mount weight of 3.7 kg (8.15 lbs)
- CNC machined and cast metal body
- Unique friction brake to safely stop movement during a planned or unplanned power interruption
- 360 second gear period
- High precision encoder with realtime PEC (RPEC)
- 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
- 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
- Soft carrying case
- Two year warranty
| Mount | Hybrid Equatorial Mount |
| RA Gear system | StrainWave 17 (RA)/worm gear (DEC) |
| DEC Gear system | Backlash-free worm/belt system |
| RA reduction ratio | 120 |
| Payload w/o CW | 29.14 lbs (13.5kg) - 200mm, with payload center of gravity to the RA rotation axis. Or an OTA size of ~220mm |
| Mount weight | 7.49lbs (3.4kg) w/o dovetail saddle, 8.15 ls (3.7kg) with dovetail saddle |
| Payload/Mount weight | 3.65 |
| Period | 360 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 | ± 5º |
| 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 | 6º/sec |
| Power consumption | 0.5A(Tracking), 1A(GOTO) |
| Power requiremention | 12V DC, 5A |
| AC adapter | 100V ~ 240V (included, indoor use only) |
| Power off brake | Electronic friction brake |
| Power-down memory | Yes |
| Wi-Fi | Built-in |
| Communication port | Yes (Wi-Fi and USB) |
| Autoguide port | Yes (ST-4 compatible) |
| Firmware upgrade | Yes |
| Tripod | Optional |
| Operation temperature | -20ºC ~ 50ºC (hand controller -10ºC ~ 40ºC) |
| Warranty | Two year limited |