I’m not interested in a Who’s Who of photography or who anybody is talking about," says Artur Walther, a longtime board member of the International Center of Photography who has assembled his own collection of more than 1,200 photographs and videos. Though he began with modern and contemporary German photographers, especially August Sander and Bernd and Hilla Becher, Walther’s extensive acquisitions in Asia and Africa have made his collection an invaluable resource for curators astutely attuned to new movements in a global art world.