She preferred portraiture to fashion photography. Notable portraits include: Mae West, Cecil Beaton, Eudora Welty, W. H. Auden, Christopher Isherwood, Orson Welles, Carson McCullers, Edward Hopper, Colette and Josephine Baker. She is known for her role in the discovery of a teenage Lauren Bacall whom she photographed for the March 1943 cover of "Harper's Bazaar". One of her favourite subjects was the model Mary Jane Russell, who is estimated to have appeared in about thirty percent of Dahl-Wolfe's photographs. She was a great influence on photographers Irving Penn and Richard Avedon. One of her assistants was fashion and celebrity photographer, Milton H. Greene.