Cinematography, the art and technology of motion-picture photography. It involves such techniques as the general composition of a scene; the lighting of the set or location; the choice of cameras, lenses, filters, and film stock; the camera angle and movements; and the integration of any special effects. (Source: https://www.britannica.com/topic/cinematography)

A cinematographer’s role is different to a director’s because they only focus on the way the film is shot, this would entail decisions about lighting, the angle of the camera, the set design and the mood the director wishes to create.