Consider a person walking, while being filmed. Although the camera keeps the human figure in the frame, the remaining of the environment changes. This is mobile framing. Camera movement allows an audience to know more about a frame. In an establishing shot, the audience may be introduced to an environment before characters appear. If characters are already in the shot, we shall know more about their surrounds. Movement also helps us in our sense of enquiry. We wish to know as much as possible of the surroundings, so movement is very important in recreating realism.