A technique in which objects in the foreground and the distant background appear in equally sharp focus.

The ability of a camera to focus equally on elements in the shot both very close to and a great distance away from the camera. This allows action to be photographed throughout the fore-, middle, and background of a frame, within the same shot.

Deep focus is a photographic and cinematographic technique incorporating a large depth-of-field. Depth-of-field is the front-to-back range of focus in an image — that is, how much of it appears sharp and clear. Consequently, in deep focus the foreground, middle-ground and background are all in focus.