ARRI UMC-4 controller for WCU-4 – for universal camera compatibility

UMC-4 controller to convert WCU-4 into a universally compatible WLCS system

The Universal Motor Controller UMC-4 is an advanced 3-axis motor controller which converts the ARRI WCU-4 and WCU-4 for Alexa Mini into a universal WLCS (Wireless Lens Control System) compatible with all cameras. Note that there is no charge if selecting this item if also hiring the WCU4 system.

WCU-4 3-axis WLCS package complete with UMC-4 option for universal compatibility

Up to three different hand units can connect to the UMC-4 at the same time, controlling focus, iris and zoom on any camera. The intuitive user interface helps to quickly setup the system and makes it easy to use. The high-quality outdoor antenna offers improved durability and reliable radio connectivity.

Lens Data

The UMC-4 incorporates the LDS Lens Data Archive and generates frame-accurate lens data with any lens. Lens data is used for lens mapping to pre-marked focus rings and depth-of-field display on the WCU-4 hand unit. It also enables focus tracking – setting the focus motor to continuously follow a subject by using an ultrasonic distance measurer. For VFX tasks in post, the UMC-4 records lens data with timecode, helping match the virtual lens to the recorded image.


The UMC-4 supports internal and external timecode that is recorded with frame-accurate lens data onto SD card, making the lens data usable for postproduction. The internal timecode clock can be jam-synced from external devices, but can output LTC timecode as well.

Multiple Interfaces

The UMC-4 includes multiple interfaces for maximum flexibility on set. Two serial interfaces connect peripheral equipment such as ARRI’s UDM-1 distance measure or motion control systems. Optional connector modules interface directly with focus and zoom demands from Fujifilm and Canon. An Ethernet connector integrates the UMC-4 with standard IT equipment, allowing Ethernet-based system control and remote access to the lens data files on SD card.

WCU-4 3-axis WLCS package complete with UMC-4 option for universal compatibility

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