Eadweard James Muybridge (1830-1904) pioneered animal sequence photography. After emigrating to California he became a profesional photographer and later official photographer to the Government. He was commisioned by Leland, the ex-Governor, to photograph his horses in motion to prove that a trotting horse at times has all his feet off the ground. This he carried out by using small cameras whose shutters were set to a speed of 1/500 second and then released by threads broken by the horse or by clockwork. He also produced studies of movement in humans.
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