Some of the people who are now manipulating photos, such as Andreas Gursky, make the argument—rightly—that the “straight” photographs of the 1940s and 50s were no such thing. Ansel Adams would slap a red filter on his lens, then spend three days burning and dodging in the dark room, making his prints. That’s a manipulation. Even the photographs of Henri Cartier-Bresson, with all due respect to him, are notoriously burned and dodged.