Cinematography: Camera movement
One of the simplest and most common movements is to turn, or pan (from the word panorama), the camera horizontally so that it sweeps around the scene. It can also be tilted up or down in a vertical panning shot or in a diagonal pan, as when it follows an actor up a stairway. Panning was possible quite early in film history, but methods of physically conveying the camera itself through a scene developed more slowly. Initially the camera was mounted on a dolly, truck, or other hand-propelled wheeled vehicle to facilitate smooth movement. Later, tracks were laid for the dolly or truck to ride on, providing even smoother, more effortless motion. Trucking, dollying, and tracking can even be combined with panning in a complex movement that may require the adjustment of focus or aperture en route. One such camera movement that is often used imitates the gaze of a traveler who turns in a moving automobile or train to focus on a stationary point of interest.
Often commercial vehicles, such as trolleys, automobiles, or airplanes, are used to transport the camera; the relatively jerky ride they supply simulates real movement more accurately than does the steady motion provided by a specially designed apparatus. Nevertheless, the film industry has long sought equipment that would allow the camera (and the viewer) to weave in and out of action in the most ethereal way. The crane, which facilitates aerial movement, was developed in the late 1920s, replacing the jerry-built movable platforms, the slings, and the sleds that ingenious directors, such as Abel Gance (for Napoléon, 1927) and Marcel L'Herbier (for L'Argent, 1929), both in France, had devised to achieve vertical or elevated swinging movements. Numerous special camera supports were developed in the later 20th century, many of which were originally developed for use on medical and scientific films. Equipment developed in the 1970s and '80s could be operated from a distance with electronic viewfinders, allowing the camera to follow vigorous continuous action with an ease and intimacy that had previously been unknown, as in the precredit sequence of Raiders of the Lost Ark (1981). The look and style of film art is constantly changing as technological advances increase the mobility of the camera and consequently the flexibility of the spectator's viewpoint.
Regardless of the level of technical capability, the effect of camera movement depends on the context and the pace of movement. At a deliberate pace the camera can explore a scene and reveal significant details. If it is raised well above the ground, the movement has a dreamlike power, and, when combined with slow motion, it may give a somnolent impression or express recollection or hallucination. The camera movement may end dramatically on a dagger, on a gun half-hidden in an assailant's hand, or on a suspicious bulge in a pocket. It may link the hero walking in the garden and the heroine watching him with loving eyes from a window. It may bring a dramatic surprise, as in the American western Stagecoach (1939), when director John Ford had the camera, mounted high above a rocky defile, move slowly from the stagecoach below to reveal a band of Indians waiting in ambush. On the other hand, the camera may simply turn away from a scene to leave the remainder to the spectator's imagination, as when it withdraws from a torture scene or from a love scene. In filming a conversation, the director may turn the camera from one speaker to the other, thus animating the scene with movement and showing the expression of the speaker, or listener, more closely than would be possible with a static two shot. Camera movement can even be used to change the scene to a distant place, to a different period of time, or to an imaginary world.
Very rapid camera movements may express a sudden surge of emotion or a contemplated action, as in the suicide from Umberto D. In The Rains Came (1939), as the heroine realizes with horror that she has drunk from a glass that may be contaminated with typhus, the camera rushes forward to a close-up on the fatal glass, shining in the darkness. These movements are often effected without physically moving the camera, by means of a zoom lens, a lens of variable focal length that simulates the effect of moving toward or away from a subject by increasing or decreasing the size of the subject as the focal length changes. Although a zoom shot is generally smoother than a tracking shot, it always results in pictorial distortion. To zoom in from a distance to a close-up, the focal length of the lens is changed from, for example, 18 mm to 125 mm. The former length curves the picture anamorphically on the sides, giving great depth to the background, while the latter tends to flatten the background. All objects within view are enlarged at the same rate. Tracking in from a distance to a close-up requires careful adjustment of focus, but depth and dimension appear more realistic.
Camera movement is one of the key indicators of the presence of a narrator. When the camera moves independently of the action, the narrator can be thought of as hovering above the action, poetically reacting to it or commenting on it. When the camera moves instead to keep the action in view, to follow as many elements as possible, the narrator can be thought of as a reporter investigating but not commenting on what is seen. The documentary tradition, particularly since 1959, when lightweight cameras and tape recorders first permitted extended handheld filming, represents this investigative function of cinema and of camera movement.
Directorial styles may be cataloged on the basis of an overall predilection for linking elements in a scene via cuts (montage) or camera movement. Eisenstein has already been cited as a master of montage. One of the directors most acclaimed for the expressive use of camera movement is Japan's Mizoguchi Kenji. Although Mizoguchi was not beyond making strongly rhetorical points by juxtaposing shots, the overall impression his films convey derives from the use of a seemingly floating camera to join not only elements within a scene but also the scenes themselves. In Ugetsu (1953) the hero, seduced in a hot spring by a beautiful ghost woman, moves screen right to join her, while the camera pans left across the pool and then tracks along the ground. The shot dissolves imperceptibly into one in which the camera pans up to reframe the couple picnicking in an extreme long shot. The magical mixture of spaces and the conflation of time sensuously express the erotic imagination to which both the hero and the audience have fallen prey. Mizoguchi is known as a mise-en-scène director, one who is primarily concerned with the relationships within a shot rather than those between shots. His films rely on long takes, camera movement, and the expressive use of elements within the film frame to convey mood and emotion. The possibility of movement was so important to Mizoguchi that at the end of his career he invariably directed from a crane, even during static scenes.
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