Autofocus (AF)
The Autofocus (AF) mechanism automatically adjusts focus. With it, the camera measures the distance to a subject and adjusts the lens so that the subject is in focus. Currently, with the exception of a few cameras for professional use, this function is included in most of the single lens reflex and compact cameras that are now on the market. Of course, this function is used in the
43in a dark room, focusing is performed using a beam of light from the camera (the AF- Illuminator).
Autofocus is designed so that the subject in the center of the picture frame is correctly focused. However, sometimes you may want a subject that is not in the center of the frame to be in focus; for such cases, the
(1) Subject that does not | (2) Subject with low | (3) A rapidly moving |
include vertical lines | contrast | subject |