The Industry Standard  for focus control, our HU3 (Hand Unit 3) empowers the focus puller with a completely new set of tools to get tougher shots in fewer takes.  Lens mapping eliminates the need to mark rings for each lens.

The G4 Wireless System was designed in house by Preston specifically for the needs of modern film sets.  Keeping with the Preston philosophy of rugged, bulletproof products, the HU3 was designed with innovative ultrasonic iris slider technology which means the chassis remains sealed, splashproof, and dustproof for sustained operation in even the most extreme conditions.

When a Micro Force zoom control is attached, a bright red LED bargraph display illuminates on the HU3 to show the current zoom position. Tactile switches allow the user to set limits for any of the F, I, or Z controls, restricting that motor’s movement for critical or repeated shots.

Focus, Iris and Zoom at your control.  Truly groundbreaking for 1st AC’s.


  • Channels: Focus, Iris, Zoom (with Micro Force attached), AUX (with MDR-3)
  • Dimensions: 7.2in x 7.6in x 3.3in
  • Display: OLED
  • INPUT VOLTAGE: 7-9VDC (battery), 10-30VDC (command cable)
  • MAX. Current Draw: 0.2A (at 8V)
  • OPERATING TEMP.: 0F to 122F
  • WEIGHT: 40.2oz (1.14kg)
  • WIRELESS RANGE: 300m (line of sight)