National Geographic Society has throughout its history been famous for its excellent photographs, particularly for its portraits which have provided many iconic images from all over the world.In Focus: National Geographic Greatest Portraits offers an extensive selection of photos spanning well over a century. The images are grouped into periods that correspond roughly to changes in photographic equipment and techniques, from the cumbersome cameras and long exposures of early days to the advent of colour film and the lightweight, versatile modern gear that fostered a new, informal spontaneity in portraiture. The book traces the evolving roles and goals of photographers themselves, and offers revealing insights on how their work both reflects and influences how we see ourselves and our world.