The fundamentals of exposure and the essentials of lighting are explored in this photography reference that uses progressive images from portrait sessions as its basis of explanation. Starting with how light is perceived differently by the camera than the human eye, this resource clarifies the more complicated laws that govern light, breaking the rules down with clear, effective examples. Various light sources are investigated--from simple sunlight to advanced professional and studio systems--as well as the types of lighting units used at different times during the sessions. By adding or modifying one light at a time, a sequence of images shows how the desired effect was achieved, offering photographers step-by-step troubleshooting tips. Concise text paired with photo examples offer any portrait photographer the techniques needed to create perfectly lit images.