Movie Terms Wiki Filmmaking

Follow Focus

A mechanical system that allows precise control of a camera lens’s focus during shooting.


Function

Follow focus systems enable the camera assistant (1st AC) to adjust focus smoothly without touching the lens directly, ensuring stability and accuracy.

Components

  • Focus Knob/Wheel — Operated by the AC, often marked for focus points.
  • Gear Drive — Transfers movement from the knob to the lens focus ring.
  • Mounting Bracket — Attaches to rods on the camera rig.

Importance in Filmmaking

In narrative filmmaking, where depth of field can be very shallow, even slight focus errors can ruin a shot. Follow focus systems allow for repeatable, precise focus pulls.

Variations

  • Manual — Standard on most sets.
  • Wireless — Used for gimbals, cranes, or situations where the AC cannot be near the camera.

Notable Use

Critical for complex shots like those in Birdman, where focus shifts multiple times within a single take.


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