Purchases of a HEM27 include a free iPolar through 3/31/2026 Description Introducing the HEM27 and the HEM27EC, iOptron’s revolutionary hybrid harmonic 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 harmonic 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 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). 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 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 Soft carrying case Two year warranty Specifications 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) 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 PEC Yes, Permanent PEC Latitude adjustment range 15º ~ 65º Azimuth adjustment range ± 5º Polar Scope No 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 * 200mm, with payload center of gravity to the RA rotation axis. Or an OTA size of ~220mm.
