Blackmagic Design Zoom Demand
Add pan handle-mounted zoom control to your Studio Plus or Studio Pro camera with this Blackmagic Design Zoom Demand by Systec International.
Featuring dual USB connectors, the zoom demand mounts on your pan handle with a rosette so you can adjust its position for your comfort.
You can also find more here.
It features a familiar in/out toggle with a speed selection knob and a rec start/stop button.
Click here to view more.