The ARRI FF-4 Studio Follow Focus is a widely used and highly regarded precision focus control system for professional cinema lenses. Known for its robust build quality and exceptional smoothness, it provides accurate and repeatable focus pulls. Designed for studio and on-set use, the FF-4 features a gear ratio optimised for precise adjustments, making it a reliable choice for critical focus pulling tasks in narrative, commercial, and broadcast productions. 

Overview

  • Professional follow focus system 
  • Robust and durable construction 
  • Exceptional smoothness and precision 
  • Optimised gear ratio for accurate focus pulls 
  • Interchangeable drive gears for various lenses 
  • Compatible with studio rods (15mm/19mm studio rods) 
  • Hard stops for repeatable focus marks 
  • Industry standard for reliability 

1x ARRI FF-4 Studio Follow Focus
1x Standard Focus Knob Left for FF4/FF5
1x Standard Focus Knob Right for FF4/FF5
4x ARRI Focus Disk Flat
1x ARRI Marking Disk Bevelled
1x Adapter for FF-4 to Bridge Plate BA-2/BA-3 19mm
1x ARRI Extension for Focus Knob
1x ARRI Flexible Short Whip 300mm
1x ARRI Flexible Long Whip 900mm
1x ARRI Whip Handle
1x ARRI Long Whip Handle
1x ARRI Focus Lever Handle
1x ARRI FF Gear 0.8 Mod, 35 Tooth, 10mm
1x ARRI FF Gear 0.8 Mod, 35 Tooth, 25mm
1x ARRI FF Gear 0.8 Mod, 43 Tooth, 6mm
1x ARRI Coupling For FF-4/FF-5
1x ARRI FF-4 Case

Gear Selection
Always select the appropriate drive gear for your lens. Ensure it mates perfectly with the lens’s focus ring, with no slipping or binding, for accurate focus pulls. 

Backlash Check
Before shooting, always check for any backlash in the follow focus system. A small amount is normal, but excessive backlash can lead to inaccurate focus. 

Hard Stops Utilisation
Utilise the adjustable hard stops for repeatable focus marks. This is invaluable for actors hitting marks, complex rack focuses between specific points, or blind focus pulls. 

Smooth Operation
Practice smooth, consistent focus pulls. The FF-4’s design aids in this, but the operator’s technique is still paramount to avoid jerky or noticeable focus shifts. 

Rod Compatibility
Ensure your camera rig has the correct 15mm or 19mm studio rods and spacing to properly mount the FF-4.