Discover the HEM27 and HEM27EC, the revolutionary hybrid stress wave (harmonic) drive mounts from iOptron. These lightweight titans with high payload capacity will provide an unprecedented astronomy experience. Imagine a mount head weighing 3.7 kg with a payload capacity of 13.5 kg, without the need for a counterweight or cumbersome shaft. Applying iOptron's decades of experience in creating precision mounts, the HEM27 embodies this vision.

Utilizing cutting-edge stress wave (harmonic) drive technology for right ascension (RA) movement in tandem with a play-free design for declination (DEC) movement with screw/band, the HEM27 offers unmatched weight-to-payload efficiency. Its anodized black CNC machined metal body is not only attractive but also a robust platform that will perform at the highest level for many years. Unique features include an electronic friction brake for safely stopping movement during a planned or unexpected 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 MacOS software; a smartphone/tablet via iOptron Commander Lite or an app like SkySafari; or a Raspberry Pi device via an INDI driver.

The HEM27EC is equipped with a high-precision RA axis encoder that provides incredible tracking accuracy, sufficient for many to choose to image "without" guiding.

• Advanced harmonic gear technology

• Payload capacity of 13.5 kg (without counterweight) with a mount weight of 3.7 kg
• CNC machining
• Unique friction brake to safely stop movement during a planned or unexpected power interruption
• Gear period of 360 seconds
• Go2Nova® manual controller with a database of approximately 212,000 objects
• Cable management system, no external cables on moving parts
• Dual mounting plate (Vixen and Losmandy-D styles)
• Built-in zero position search and locator
• Built-in ST-4 autoguiding port
• Integrated Wi-Fi (via the manual controller)
• USB port for firmware updates and computer control
• Soft carrying case
• Two-year warranty