In this photograph, Kevin Wolf captures so much drama within a London bookstore with no post-processing involved. AMAZING. The photographer has deliberately underexposed the shot to obtain this dramatic effect. Manipulating the exposure of your photographs requires knowledge of your camera and the willingness to experiment with your aperture, shutter speed, and ISO. Ultimately, it is your creative choice of how you want to expose your image, and in some cases there may not be enough light to create a well-exposed photo. If underexposing your image, shooting in RAW may give you more flexibility with the files in post-production as more data is stored in the files.