Which component rotates to control exposure timing by moving between blocking light and exposing the frame?

Which component rotates to control exposure timing by moving between blocking light and exposing the frame?

• A. Film Loop
• B. Shutter
• C. Gate
• D. Cement Splicer

Answer: (B)

Exposure timing for a frame is controlled by the shutter. In traditional film cameras, the shutter moves between blocking light and exposing the frame, opening just long enough for light to hit the film and then closing to stop the exposure. A rotating shutter (or a rotating blade with a slit) sets how long the film is exposed, which also affects motion blur and brightness. The other parts serve different roles: the film loop is the length of film in the path, the gate is the window where film sits to be exposed or projected, and the cement splicer joins film pieces.

Exposure timing for a frame is controlled by the shutter. In traditional film cameras, the shutter moves between blocking light and exposing the frame, opening just long enough for light to hit the film and then closing to stop the exposure. A rotating shutter (or a rotating blade with a slit) sets how long the film is exposed, which also affects motion blur and brightness. The other parts serve different roles: the film loop is the length of film in the path, the gate is the window where film sits to be exposed or projected, and the cement splicer joins film pieces.