Short term photography
Under short-term photography is meant to create photographs that an extremely short exposure time s of less than about 1 / 5,000.
technology
The short exposure time is usually not regulated by mechanical shutters (as is usual), but by the lighting time of electronic flash units . The recording then takes place in a darkened room. Even with commercially available flash units, exposure times of approx. 1 / 50,000 s and shorter can be achieved with reduced power. Modern electromechanical slot closures indeed penetrate partly in this time period before, fast moving objects, however, by the relatively slow movement of the slot, whereby the so-called rolling shutter arises distorted displayed. In the case of film material, it should be noted that the short-term effect (similar to the Schwarzschild effect ) requires more light than the time / f-number combination suggests. Digital image sensors must be able to process such short pulses.
As a result of the development in camera and shutter technology, the possibilities for recording fast motifs and their movement with commercially available cameras have greatly improved. Shutter speeds of 1/4000 of a second are common today for single lens reflex cameras .
For effects in films and scientific purposes, Frozen Reality is used, in which recordings are made from several viewing directions at the same time, which (put together) a tracking shot around an "event", such as. B. allow a bursting balloon.
See also
literature
Harold E. Edgerton : Stopping Time, ISBN 0810915146