Figure 2-11. The apparent depth perspective of
three different focal length lenses
3. A telephoto lens, as you recall, increases image size and reduces the
angle of view. Thus objects in the background appear closer to objects in
This apparent foreshortened perspective of depth is the
compression of the space between the foreground and background.
4. A wide angle lens has an opposite effect on depth perspective. Objects
in the background appear further away than normal because of increased angle
of view and decreased image size.
5. Remember that the perspective of depth is NOT dependent on the lens
focal length. It is dependent on the lens-to-subject distance. A choice of
lenses of different focal lengths, however, does enable you to get the
desired image size at the selected distance for best depth perspective. For
example, suppose you come across a scene (fig 2-12). A wooded rail fence is
in the foreground and a horse in the field. The horse is 100 feet behind
the fence; you are 10