Photography is the art and practice of creating images by recording light or electromagnetic radiation, either chemically on film or electronically with an image sensor. Cinematography is the technique of motion picture photography, including both shooting and developing film. Key lighting, fill lighting, and back lighting are used to illuminate subjects, with different colored lights and lamp types like tungsten and HMI used to achieve desired moods and effects. Camera settings and lens focal lengths and apertures can influence depth of field and bokeh. Popular cameras for cinematography include the Arriflex and the Aaton, while digital options continue to emerge alongside film.