Time-lapse photography is a cinematography technique whereby the frequency at which film frames are captured (the frame rate) is much lower than that which will be used to play the sequence back. When replayed 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, and then played back at 30 frames per second; the result would be an apparent increase of speed by 30 times. Time-lapse photography can be considered to be the opposite of high speed photography.
In time-lapse photography images are taken at different time intervals and later combined to play the sequence back. If you are interested in shooting a sunset or clouds moving,set your camera to capture 5pics every 1 min interval which can be later combined to get a beautiful video of clouds flowing or sun setting fast. To capture Wood decay or plants growing you may need to capture images for weeks with a longer time interval between each shots.
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