One of the world's preeminent photographers, Irving Penn is famous for portraiture, still life, and other commercial work. He is less well known as a superb photographer of the female nude. His most important pictures in this genre were made in 1949-50 during intense sessions with artist's models that were essentially an artistic antidote to the ephemeral fashion world. Charged with powerful, physical, and sexual energy, yet somehow chaste, the images...