ŝ179ŞUsing the Mode DialUsing the Av (Aperture Priority) Modeƈ Set aperture for controlling the depth of field. The depth of field is deeper and the front and back ofthe focused object is clear when aperture is set to a large value. The depth of field is shallower andthe front and back of the focused object is blurred when aperture is set to a small value.Shutter speed is automatically set to appropriate exposure depending on the aperture value.ſ Effect of Aperture and Shutter Speed (p.199)1. Set the mode dial to Av.2. Turn the rear e-dial and adjust the aperture value.- The shutter speed and aperture value are displayed in theviewfinder and on the LCD panel.