Initial data
Winter night in 1983 in Hessdalen Arne P. Thomassen took this picture while the camera (400 mm lens and 400 ASA color film) was on the tripod during the exposure (a few seconds).
Yellow light was moving irregularly during the exposure, leaving a yellow mark on the film.
Translated by «Yandex.Translator»
Original news
Winter 1983, night – Hessdalen, Holtålen Arne P. Thomassen took this photograph while the camera (400mm lens and 400 ASA color film) was standing on a tripod during the exposure time of some seconds. A yellow light was moving irregularly during the exposure, leaving a yellow trace on the film.
Hypotheses
Objects in motion, captured on a long exposure
Most often this artifact is called skayfish if the lens gets a passing bird or insect. It is based on the discrepancy between the speed of the video and the frequency of the flapping of insect wings. Essentially, each video drops a few strokes of the wings of an insect, which when viewed looks like "arrow", provided with long protuberances. The motion of the insect by its translucent body seems to "boom" and vibration of the wings give the appearance of bumps.
Investigation
Resume
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