A portable camera that used 35mm film and an intermittent mechanism modeled on that of a sewing machine.

A portable camera that used 35mm film and an intermittent mechanism modeled on that of a sewing machine.

• A. Kinetoscope
• B. Camera Obscura
• C. Pinhole Camera
• D. Cinematographe

Answer: (D)

The main idea here is a motion-picture setup that can be carried and used as a camera while recording on standard 35mm film, using a precise, intermittent frame-advance mechanism. The Cinematographe fits this description best because it was designed to be portable, hand-cranked, and capable of capturing a sequence of images on 35mm film. Its film-advance system moves the film forward frame by frame and then holds it briefly in place during exposure, a mechanism inspired by the sewing-machine style feed that ensures each frame is exposed cleanly and evenly. This combination—portability, 35mm film usage, and an intermittent advance crucial for frame-by-frame capture—is what made the Cinematographe a landmark in early cinema. Other devices in the list don't match all these features in the same way. One is primarily a viewing device rather than a camera; another is an imaging method that doesn’t use the 35mm film and frame-by-frame capture in a portable camera context; and the remaining simple camera concepts aren’t built around a sewing-machine–inspired intermittent mechanism with 35mm motion-picture film.

The main idea here is a motion-picture setup that can be carried and used as a camera while recording on standard 35mm film, using a precise, intermittent frame-advance mechanism. The Cinematographe fits this description best because it was designed to be portable, hand-cranked, and capable of capturing a sequence of images on 35mm film. Its film-advance system moves the film forward frame by frame and then holds it briefly in place during exposure, a mechanism inspired by the sewing-machine style feed that ensures each frame is exposed cleanly and evenly. This combination—portability, 35mm film usage, and an intermittent advance crucial for frame-by-frame capture—is what made the Cinematographe a landmark in early cinema.

Other devices in the list don't match all these features in the same way. One is primarily a viewing device rather than a camera; another is an imaging method that doesn’t use the 35mm film and frame-by-frame capture in a portable camera context; and the remaining simple camera concepts aren’t built around a sewing-machine–inspired intermittent mechanism with 35mm motion-picture film.