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In photography, the shutter-release button (s just shutter release or shutter button) is a push-button found on many cameras, used to record photographs. [1] When pressed, the shutter of the camera is "released", so that it opens to capture a picture, and then closes, allowing an exposure time as determined by the shutter speed setting (which ...
Shutter lag is the time between the shutter release being pressed and the exposure starting. While this delay was insignificant on most film and some digital cameras, many digital cameras have significant delay, which can be a problem with fast-moving subjects as in sports and other action photography.
On others, including many Digital SLR cameras, bulb is typically available from the manual exposure mode and—rarely—also from shutter priority mode. [4] When set to bulb, generally on the "M" or manual setting of the camera, the shutter will stay open as long as the shutter release button (or shutter release cable or remote) remains depressed.
One can either manually set exposure and focus, or use automatic exposure and autofocus, then fixing the settings so they do not change; this can often be done by holding the shutter release halfway down, or by using a separate "AE / AF lock" button (useful if taking multiple photographs that are not in a burst), and means the subsequent ...
However, some photographers find that having AF-on and the shutter release on the same button makes it harder to establish the correct focus point, or hold it once the desired point is established. By using a separate shutter and focus button, focus can be locked at the same time as shooting without changing exposure, allowing the photographer ...
The diaphragm of these lenses remained fully open, providing a bright viewfinder image, until the button was depressed halfway, when the iris would be stopped down to the shooting aperture; pressed further, the lens button engaged the camera's shutter release button, tripping the shutter. [4] An Exakta Varex with bellows and slide copier