The JVC Professional HZ-ZS13U is a dedicated servo zoom/focus/iris controller designed for use with professional JVC video cameras, primarily the GY-HM series (like the HM790, HM750, HM650, and HM200) and the KY-PZ100 4K studio camera. It is an essential accessory for studio, live event, and ENG (Electronic News Gathering) environments where smooth, precise, and repeatable lens adjustments are critical.

The unit features a comfortable handgrip with intuitive controls, including a large servo zoom rocker switch for variable speed zooming, along with separate buttons and rings for manual focus and iris control. It connects to the camera via a multi-core cable and a proprietary 12-pin connector, providing both power and communication. The HZ-ZS13U effectively transforms a handheld or shoulder-mount camera into a more versatile tool for controlled shooting scenarios, allowing the operator to achieve broadcast-quality lens movements.