ARRI WCU-4 Wireless Follow Focus

The Wireless Compact Unit WCU-4 combines three axes of lens control with a lens data display in a compact and ergonomic housing. Weighing around 780 grams including the battery, it is one of the lightest hand units in its class, providing unrivaled comfort during a long working day. With the ALEXA remote control software, you can set frame rate, shutter angle, exposure index, false colour on the monitor output, and more; all remotely. Extended camera status information is also available, allowing you to quickly check your camera settings at any time.

Noteworthy Attributes:

  • Tactile vibrating markers lets you keep your eye on the action in the most challenging situations
  • Super-smooth focus knob contains an integrated light source that shines through the wide, optionally pre-marked focus ring in low light conditions, providing clearly readable focus marks at all times
  • User button can be configured to activate focus tracking, setting the focus motor to continuously follow a subject by using an ultrasonic distance measurer

Rental Rates

: $350 + HST
: $1050 + HST
: $350 + HST

Package Contents

  • WCU-4 Hand Unit /w Strap 
  • Monitor Bracket 
  • Pre-marked Focus Rings (various sizes) 
  • 5x Blank Marking Rings
  • Battery Kit
    • 4x Batteries
    • 1x Battery Charger
  • 1x cforce Motor Kit (or CLM Motor Kit)
  • Run-stop Cables
  • Motor Controller (additional $75/day)
Special FeaturesBuilt-in vibration motor for tactile feedback
Focus KnobLED backlit rotary knob with adjustable friction, 3.0” diameter
16-bit native encoder resolution
Iris SliderFully sealed, splash and dust-proof slider mechanism
14-bit native encoder resolution
Zoom KnobForce sensitive knob
Ergonomic design
DisplayTransflective TFT LC-Display (readable in bright sunlight)
3-inch diagonal
HousingDurable and robust housing made of high-strength anodized aluminum
Sealed assembly with back-lit display buttons and index marker
MassApproximately 780 grams including battery
Power SupplyNP-FM500H battery (Sony) or compatible batteries
BC-QM1 battery charger (Sony) or compatible chargers
Powered via LCS cable through ARRI camera (cabled mode)
Operating Temperature-20°C to +45°C


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