Cinematography:

This refers to the art of creating visuals and capturing moments on camera, in the process of filmmaking. Everything that appears in shot, from the camera’s perspective, are works of cinematography. From the composition to the framing, the way the camera moves, and the objects and subjects on film are staged, all cinematographic concepts.

Cinematographer:

The filmmaker in charge of cinematography is referred to as a cinematographer. Similar in nature to a director of photography, a cinematographer builds the shot, and takes charge of the lighting and staging teams. It is the cinematographer’s job to actualize the director and screenwriter’s ideas in a tangible way. Cinematographers will often become a frequent collaborator of their respective director, as they form a strong workplace rapport.

Diegesis:

A concept in cinematography which revolves around the existence, or nonexistence, of the camera in a film. The reference for this in a text would be “intra-diegetic”, where the camera does exist, and it takes the place of a subject inside the scene, becoming the new frame of focus, such as the example above of a mysterious aperture pointed at James Bond, or “extra-diegetic”, where the camera is an intangible construct which watches in on a scene, neglecting to give the perspective of any one character in a scene, even to the extreme of characters acknowledging or addressing the audience, “breaking the Fourth Wall”. A good example of extra-diegetic gaze is Christian Bale in American Psycho.