American Photographer, 1864-1946..S. photographer and exhibitor of modern art. He was taken to Europe by his wealthy family to further his education in 1881. In 1883 he abandoned engineering studies in Berlin for a photographic career. Returning to the U.S. in 1890, he made the first successful photographs in snow, in rain, and at night. In 1902 he founded the Photo-Secession group to establish photography as an art. His own best photographs are perhaps two series (1917 C 27), one of portraits of his wife, Georgia O'Keeffe, and the other of cloud shapes corresponding to emotional experiences. His photographs were the first to be exhibited in major U.S. museums.