Thomas R. Smith

As associate illustrations editor of the National Geographic, Tom Smith shepherded some of the world's best and most famous images into print. But his work as a teacher of photojournalism, though lesser known, is not to be overlooked. Here he helps a student figure out a cranky Ultrablitz Meteor SPGH electronic flash.

Leica M-4, 50mm f1.2 Canon lens, Tri-X