ZMU-4 Zoom Main Unit Basic Set

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Flexible connectivity and control
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Manufacturer

A modern Take on the classic zoom control.

Rugged, weather-resistant, and ergonomically designed, the ZMU-4 seamlessly transitions between wired and wireless configurations.
Its unprecedented connectivity enables versatile, clutter-free camera builds and faster on-set workflows.

Uniquely versatile wireless functionality

Choose different radio modules for different regions and shooting situations.
The ZMU‑4 supports all the new radio module options available for the Hi‑5 hand unit.
Wireless operation is more streamlined than with any other system.

Wireless expansion for other devices

The ZMU‑4 can act as a radio module for other LBUS control devices such as the ARRI OCU‑1 or Master Grips, offering the possibility of multi-axis controllers off-camera.

Ergonomics and durability

Intuitively familiar for traditional tripod setups, the ZMU‑4 is comfortable to use in either hand, allowing precise control via the force-sensitive zoom knob. It is also the most robust and weather-resistant zoom unit on the market.

Innovative display

An easy-to-read display shows the exact focal length at any point in the zoom range, as well as the zoom speed and remaining battery power. Markers and limits for individual shots can be set with ease.

Configurable control, on or off the camera

Three user buttons offer customizable shortcuts for the operator and dedicated zoom speed buttons fall neatly under the index finger. Camera control is available for ARRI and third-party camera systems.

Technical data

Joystick:	Force sensitive joystick
Display:	Transflective TFT-LCD Display (readable in bright sunlight) 0.96“ diagonal
Interfaces:	- 1x LBUS (LEMO 4pin) for lens motors, daisy chainable; supports LBUS protocol, LCS protocol (for ALEXA cameras) and EXT protocol (for AMIRA cameras) - 1x CAM (LEMO 7-pin) for camera control - 1x USB-C for software updates - 1x ARRI Radio Module Interface - 1x Battery Interface
Mounting points:	2x interfaces for ARRI Rossette
Operating temperature:	-20° to +50°C -4° to +122°F
Weight:	- 360 g / 0.79 lbs (ZMU‑4 body) - 476 g / 1.05 lbs (ZMU‑4 body with battery) - 526 g / 1.16 lbs (ZMU‑4 body with battery and RF-EMIP or RF-2400) - 556 G / 1.23 LBS (ZMU‑4 body with battery and RF-900)
Power Supply:	Powered externally: - Power via LBUS interface - Power via CAM interface Powered by battery: - ARRI LBP-3500 battery pack - NP-F550 battery (Sony) or compatible batteries
External Power Supply	10.5 - 34 V DC
Power Consumption Typ (W)	- 1 W (ZMU‑4 body) - 1.4 W (ZMU‑4 body with RF-EMIP) - 2.3 W (ZMU‑4 body with RF-2400) - 3 W (ZMU‑4 body with RF-900)
Measurement (L x W x H)	- 66 x 43 x 215 mm / 2.6 x 1.69 x 8.46" (ZMU‑4 body) - 66 x 45 x 277 mm / 2.6 x 1.77 x 10.91" (ZMU‑4 body with RF-EMIP or RF-2400) - 66 x 45 x 414 mm / 2.6 x 1.77 x 16.3" (ZMU‑4 body with RF-900)