Camera rehearsal is a run-through where camera movements and shots are coordinated before actual filming.
Technical Details
For Steadicam shots, movement radii of 3-12 meters and speeds between 0.5-2.5 m/s are specified. Crane setups require rehearsals for 180-360° pans with lift heights up to 15 meters. Focus pullers mark critical focus points with tape on the lens ring, typically 3-8 marks per take at f/2.8 or wider apertures. Dolly movements are precisely marked with chalk on the floor to the centimeter, with speed changes timed precisely to 0.1 m/s.
History & Development
In 1927, F.W. Murnau introduced systematic camera rehearsals for complex tracking shots in "Sunrise." In 1929, UFA established standardized rehearsal procedures for its major productions. With the introduction of the Mitchell BNC camera in 1934, precise repeatability standards emerged. Digital monitoring systems since 2003 enable live control of all parameters. Motion control systems since the 1980s allow for millimeter-accurate reproduction of tested camera movements.
Practical Application in Film
Kubrick's famous Steadicam shots in "The Shining" (1980) required 20-30 rehearsals per sequence for perfect timing synchronization between Danny Torrance and Garrett Brown. For "Goodfellas" (1990), Michael Ballhaus rehearsed the 3-minute Copacabana shot 15 times to synchronize focus pulls between 12 depth-of-field planes. For "Birdman" (2014), Iñárritu had Emanuel Lubezki run through each pseudo-long take 8-12 times without recording to ensure seamless transitions between the 115 individual shots.
Comparison & Alternatives
Camera rehearsals differ from blocking rehearsals by focusing primarily on technical parameters rather than acting performance. Tech scouts are used for location assessment, not for concrete shot preparation. Modern previs software like Shotgun or CineDesigner simulates camera movements digitally but does not replace the physical coordination between departments. Virtual reality previs in Marvel productions reduces rehearsal effort by 30-40% but still requires final on-set calibration for precise execution.