Contrast The ratio of dark to light in an image. If the difference between the light and dark
areas is large, the image is said to be "high contrast".
If the difference is small, it is referred to as "low contrast".
Deep focus involves staging an event on film such that significant elements occupy widely
separated planes in the
image.
Shallow focus A restricted depth of field, which keeps only one plane in sharp focus; the
opposite of deep focus. Used to direct the viewer's attention
to one element of a scene.
Depth of field The distance through which elements in an image are in sharp focus. Bright light
and a narrow lens aperture tend to produce a larger
depth of field, as does using a wide-angle rather than a long lens.
Exposure A camera lens has an aperture that controls how much light passes through the
lens and onto the film.
ex. This image shows overexposed (exposed. If an image is so pale that the detail
begins to disappear).
, Racking Focus refers to the practice of changing the focus of a lens such that an element in one
plane of the image goes out of focus
and an element at another plane in the image comes into focus.
Rate A typical sound film is shot at a frame rate of 24 frames per second. If the number
of frames exposed in each second is increased, the
action will seem to move more slowly than normal when it is played back.
Ex. In this movie, slow motion is used to contrast the emotional rescue of a child
with the death of the man who kidnapped him.
Telephoto Shot An image shot with an extremely long lens
Zoom shot The zoom shot uses a lens with several elements that allows the filmmaker to
change the focal length of the lens (see telephoto shot)
while the shot is in progress. We seem to move toward or away from the subject,
while the quality of the image changes from that of a
shorter to a longer lens, or vice versa.