selectively focusing on a specific subject within a scene or selecting
an aperture that produces
limited depth of field (so that
only that area is in focus), the viewer is predictably drawn to
the area in focus.
technique can act as a sign to the viewer, it announces, the area
in sharp focus is the subject, this is important look at this,
while the out of focus areas might be simply seen as the ground
that the subject sits against and are generally considered of less
importance. It can be used to create a psychological emphasis on
those parts of the image in focus by pulling the audience towards
them. Generally an audience expects object in the foreground to
be sharp against an out of focus background. In terms of space,
some contradiction can arise when the background is in focus while
the foreground is out of focus. Often more concentration is needed
to read images like this.
from Mural 1 The last Rivers Song 1984 Lloyd Godman
this image from the Last
Rivers Song Series the rock embankment in the background is
in focus while the wave flowing down the river is out of focus because
it is against the face of the underwater housing. As it takes the
audience sometime to read the image and understand the relationship
of the rock to the out of focus shape of the wave, it creates a
sense of visual mystery in the image.