Pictures by August Sander, James Van Der Zee, Aaron Siskind, Roy DeCarava and other photographers appear with Bey???s comments about ???how they were useful and instructive to me,??? he says.Asked whether he would ever switch to a digital camera, Bey replies, ???I???ll keep photographing with film as long as film is widely available,??? adding, ???I feel there???s a very real and close relationshi