Video Artifacts

Film camera

A film camera alternates two mechanical states: the shutter exposes a stationary frame in the gate, then closes while the pulldown advances the strip. Timing, registration, light sealing, and contact with the transport path create the mechanical film-camera family of artifacts.

A film camera exposes a stationary frame, then advances the filmFilm leaves the supply magazine, passes a light-sealed shutter and frame gate, and is advanced by a pulldown claw and sprocket into the take-up magazine. Numbered markers locate the mechanical sources of artifacts.01020304SUPPLY MAGAZINEROTARY SHUTTERFRAME GATEPULLDOWN + SPROCKETTAKE-UP
  1. 01Magazine & light sealsLoading, body seams, pressure surfaces, contamination
  2. 02Shutter & exposure timingRotary shutter angle, cadence, drive-speed variation
  3. 03Gate & registrationFrame aperture, pressure plate, lateral and vertical stability
  4. 04Pulldown & transportClaw, sprockets, rollers, channel contact