Canon Pro90 PowerShot Pro90IS Camera User Guide - Page 64

Setting the Aperture When you set the aperture in the aperture-priority AE mode, the camera automatically selects a shutter speed to match the brightness. Selecting a lower aperture value (opening the aperture) allows you to blur the background and create a beautiful portrait. A higher aperture value (closing it) brings the entire range from foreground to background into focus. The larger the aperture value, the greater the range of the image brought into clear focus. 1 Turn the mode dial to . • The aperture setting will show in the display panel. It will also appear in the LCD monitor or viewfinder if it is on. 2 Press the or arrow on the omni selector to select a value. 3 Shoot the image. • The correct exposure has been set if the shutter speed and aperture settings do not blink in the display panel. • F2.8 and F3.2 cannot be selected when the focal length has been set to the maximum telephoto setting. • If the shutter speed is flashing or shown in red, the image is under- or overexposed (insufficient light). Adjust the aperture value using the or arrow on the omni selector until the flashing stops or the shutter speed display turns to white. 62 Shooting - Selecting Particular Effects