The Panasonic Zoom/Focus/Iris Controller (ROCK - DVX - ZFI) is designed to enhance your camera and camcorder experience. This controller features a pressure - sensitive rocker switch that allows for multi - speed zoom, focus, and iris adjustments, providing a greater range of motion for finer control compared to traditional throttle - style zoom controls. With smooth and quiet knobs, you can easily adjust exposure or focus while composing your shots. The independent focus and iris knobs enable two operators to work together for critical focus during dynamic shots or crane movements. The controller also allows for seamless switching between auto and manual control for both focus and iris, ensuring versatility in various shooting conditions.