Control the zoom function of your cinema camera via wired or wireless connection using the ARRI ZMU-4 Zoom Control Unit, thanks to its onboard ports and radio module interface. Combine the ZMU-4 with other LBUS control devices like the OCU-1 and Master Grip handles. Its slim, ambidextrous design makes it easy to attach to your camera rig or hold in your hand. Separately available radio modules like the RF-EMIP, RF-2400, and RF-900 can be swapped into the control unit for different performance, depending on your shooting situation.

Connectivity and Control Interface

The unit features a 4-pin LEMO port for LBUS control with compatible ARRI ALEXA cameras and lens motors, and it can even daisy-chain units together. A 7-pin LEMO port offers control of third-party camera systems like Canon and RED models. Onboard control buttons like a force-sensitive zoom knob work in tandem with the TFT display to easily set parameters. Perform software updates with the USB-C port and power the unit using the wired camera connection, an NP-F550/750 battery, or a proprietary ARRI LBP-3500 battery pack.

Wired and Wireless Control

The ZMU-4 shares the Hi-5's swappable radio module interface and is compatible with the RF-EMIP, RF-2400, and RF-900 units. Simply slide your unit of choice into a recessed slot on the ZMU-4 and avoid cable runs altogether without the need to perform an additional setup. The ZMU-4 eliminates the need for a radio interface adapter to keep your camera build streamlined.

Wireless Expansion for Compatible Devices

When paired with an ARRI radio module, the ZMU-4 acts as a wireless connection for LBUS control devices like the ARRI OCU-1 control unit or Master Grip handles for expanded, multi-axis FIZ control.

Innovative Display, Intuitive Controls

An easy-to-read TFT display and onboard button controls make for a user-friendly zoom experience. A force-sensitive joystick and run/stop button with a tally light engage your pre-set zoom protocols with ease. The display shows your exact focal length at any point within your zoom range, the speed of the zoom, and the remaining battery power. You can even set markers and limits for individual shots, all within the ZMU-4 interface.

Configurable Camera Control

When connected to a compatible camera unit, three user buttons can be customized for specific camera function shortcuts for the operator. Two zoom buttons can increase or decrease your movement's overall speed. They are positioned right by your index finger for an easy-to-reach experience.

Flexible Power and Mounting Options

When plugged into your camera, the ZMU-4 can run off of plug-in power. In wireless configurations, a built-in L-series battery slot can accept a single Sony NP-F550/750 battery or the ARRI LBP-3500 battery pack for more consistent power delivery. With the LBP-3500 and the RF-EMIP radio module, the ZMU-4 can run for 15 hours for long shoot days. The ARRI batteries also allow the unit to display its power status for efficient battery management. A single rosette mount on the side of the unit makes attaching the unit to your preexisting rig a breeze.