shutter(redirected from shutterless)
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a device in motion-picture equipment that periodically cuts off the light passing through the aperture while the film is being advanced by the shuttle.
Both rotating (disc, conical, barrel) shutters and reciprocat-ing-motion curtain shutters are in use. Every shutter has an opening—90°, for example—through which light passes to the photosensitive layer of the film being exposed in a movie camera or to the frame of the film being projected in a film projector. The angle of the shutter’s masking blade is such that the shutter cuts off the rays of light during the time required to change frames. The rotating speed of the shutter must correspond to the frame-per-second speed of filming or projection. Shutters are also used in other optical-mechanical and photoelectric instruments in, for example, modulation of light.
shutter(1) An opaque window that is moved in one direction to let light in and in another to close off the light. In fixed-lens cameras, one shutter often suffices for aperture and speed. In most single lens reflex (SLR) cameras, the camera has a built-in shutter that pops up to let light in and drops down after a certain amount of time, while each lens contains its own diaphragm shutter that acts like an iris to let light pass (aperture setting). See shutter speed, aperture and shutter lag.
(2) To close down an operation, project or venture.