Address Movement in Close-Up Portraits  The closer you get to a
subject, the greater motion’s effect on the position of your
focal point, and the sharpness of your images. The slightest
movement by the camera or the subject at such a close range can
cause the focal point to be displaced, or the subject to be
blurred during the exposure.  In order to produce sharp images
with a controlled point of focus, you must address two factors,
movement in the camera, and movement in the subject.  Even with
your camera positioned steadily on a tripod, if your subject
moves closer or farther from your camera between the time you
lock focus and the time you take the shot, then your focal point
is no longer consistent with the position of your subject. Here
are some tips for preventing this dilemma:    • Communicate with
your subject. If you’re posing someone for his close-up, explain
to him that too much movement will affect your focus. Ask him to
remain as still as possible while you’re shooting. But, if
you’re trying to