Short-term effect

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Due to the short-term effect , more light is required for a correct exposure for chemical film material with very short exposure times than with "normal" exposure times (approx. 1 / 1,000 second to 1 second), where the Bunsen-Roscoe law applies. The color saturation is lower in color films and a blue cast can also occur. The strength of the short-term effect depends on the film material used.

The behavior of a photographic layer with ever shorter exposure times is central to sound recording, the result of which are tone negatives .

The short-term effect is an important problem with flash photography . With electronic flash units, there are light durations down to 1 / 40,000 of a second. In short-term photography , the short- term effect must always be taken into account.

The so-called Schwarzschild effect occurs with increasingly long exposure times .

Individual evidence

1. ^ ^{A b} Kurt Dieter Solf: Photography; Basics, technology, practice , Fischer Verlag 1986, ISBN 3-596-23355-0 , pp. 25, 98