Pentax 16301 K-x Black K-x Manual - Page 91

89 Opening the aperture (reduce the aperture value) Objects closer and farther than the focused subject will be more out of focus. For instance, if you take a picture of a flower against a landscape with the aperture open, the landscape in front and behind the flower will be blurred, emphasizing only the flower. Closing the aperture (increase the aperture value) The range in focus expands forward and backward. For instance, if you take a picture of a flower against a landscape with the aperture narrowed, the landscape in front and behind the flower will be in focus. 4 Shooting Functions Aperture and Depth of Field The following table summarizes how the aperture affects the depth of field. The depth of field may also change depending on the lens used and the distance to the subject. Aperture Open (Smaller value) Depth of field Shallow Area of focus Narrow Lens focal length Longer (Telephoto) Distance to the subject Near Close (Larger value) Deep Wide Shorter (Wide-angle) Far • The depth of field for the a differs depending on the lens but compared to a 35 mm camera, the value is roughly one aperture setting lower (the focused range becomes narrower). • The wider the wide-angle lens, and the farther away the subject, the deeper the depth of field is (some zoom lenses do not have a scale for depth of field because of their designs).