Time lapse

Time-lapse photography is a technique whereby the frequency at which film frames are captured (the frame rate) is much lower than that used to view the sequence. When played at normal speed, time appears to be moving faster and thus lapsing. For example, an image of a scene may be captured once every second, then played back at 30 frames per second; the result is an apparent 30 times speed increase. Time-lapse photography can be considered the opposite of high speed photography or slow motion.

Processes that would normally appear subtle to the human eye, e.g. the motion of the sun and stars in the sky, become very pronounced. Time-lapse is the extreme version of the cinematography technique of undercranking, and can be confused with stop motion animation.

Some classic subjects of timelapse photography include:

The technique has been used to photograph crowds, traffic, and even television. The effect of photographing a subject that changes imperceptibly slowly, creates a smooth impression of motion. A subject that changes quickly is transformed into an onslaught of activity.

The first use of time-lapse photography in a feature film was in Georges Méliès' motion picture Carrefour De L'Opera (1897).

F. Percy Smith pioneered the use of time-lapse in nature photography with his 1910 film The Birth of a Flower.

The first use of Lapse-Time to record the movement of flowers took place in Yosemite in late 1911–1912 by Arthur C. Pillsbury, who built a special camera for this purpose and recorded the movements of flowers through their life cycle. Pillsbury owned the Studio of the Three Arrows in the Valley and applied the technique to solving the problem of ensuring the survival of the rapidly shrinking varieties in the meadows. The Cavalry, then in charge of Yosemite, were mowing the meadows to produce fodder for their horses.

Pillsbury showed his first film to Superintendents for the National Parks during a conference held for them in Yosemite from October 14–16, 1912. The result was a unanimous agreement by the Superintendents to cease cutting the meadows and begin preservation. Pillsbury made lapse-time movies for 500 of the 1,500 varieties of wildflowers in Yosemite over the next years.

His films were shown during his lectures, which were scheduled first at garden clubs around California and then at most of the major universities across the country. Pillsbury also showed his films and lectured to town hall forums and the National Geographic Society.

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Wikipedia