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BASIC OPERATION
the lens until it stops. The viewfinder screen will darken offering you a visual preview of the depth-of-field. Another way of determining the depth-of-field is to check the depth-of-field scale engraved on the lens barrel. The f-numbers appear at both sides of the focusing index mark indicating the near and far limits of depth for any given focused distance and lens opening. For example, with the standard 50mm lens focused at 15ft. (5m), depth-of-field at f/16 extends from 8ft. (2.5m) to infinity (V). This method is particularly useful at small f/stops, when a visual preview of the depth-of-field becomes difficult, because the view- finder screen gets too dark.
•Selective focus is a creative technique used by many photographers to throw a distracting or unimportant background (or foreground) out of focus. Try using a slow film (ASA 100 or below) and a normal or telephoto lens. Focus on a subject close to the camera. Then choose a fast shutter speed which will permit the camera's AE control to select a large f/stop, such as f/1.4 – 4.
•For those shots which demand almost unlimited depth-of-field, where every object in the photograph appears sharp, use your standard 50mm lens (or better yet, a wide-angle) and focus about half-way in- between the nearest and farthest object. Adjust the shutter speed dial until the meter needle in the viewfinder points to f/16. If necessary, mount the camera on a tripod when slow shutter speeds are required.
