Which device automatically trips the shutter at a specified time and advances film?

• A. Fiducial map
• B. Principal point
• C. Intervalometer
• D. Short focal length

Answer: (C)

Intervalometer is the device designed to automate timed shutter releases and move the film to the next frame, making time-lapse or multi-frame sequences possible. By setting a specific interval, it triggers the camera’s shutter at regular moments and advances the film between exposures, exactly what the scenario describes. The other terms don’t fit this function: a fiducial map relates to map references, a principal point is a calibration term in camera geometry, and a short focal length describes a lens property, none of which automate timing or film advancement.