Photographic shutters: better pictures with a reconsideration of shutter efficiency.
An efficient photographic shutter is one which can open and close in small fractions of the exposure time, and this property is generally thought desirable. But no one combination of f/stop and time in an efficient shutter can match the subjective quality, depth of field, and motion stopping ability of certain deliberately inefficient shutters used on automatic cameras. These advantages are derived from a simple optical model by MTF techniques and are confirmed experimentally.
Plummer
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