Canon PowerShot A630 PowerShot A640/A630 Camera User Guide Camera User Guide A - Page 47

Shooting Setting the Aperture Shooting Mode The aperture adjusts the amount of light entering through the lens. When you set the aperture value, 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. z If the shutter speed is shown in red, the image is underexposed (insufficient light) or overexposed (too much light). Adjust the aperture value using the or button until the shutter speed display turns to white. z Some aperture values may not be available with certain zoom positions (p. 44). z In this mode, the shutter speed range with synchronized flash is 1/60 second to 1/500 second. The aperture value setting may therefore be changed automatically to match the synchronized flash speed even if its value was set previously. Aperture Value Display z The larger the aperture value, the smaller the lens aperture. F2.8 F3.2 F3.5 F4.0 F4.1 F4.5 F5.0 F5.6 F6.3 F7.1 F8.0* * In mode, the settings for maximum wide angle aperture and maximum telephoto aperture may be as high as F11 and F16, respectively, in some shooting conditions. z You can change the combinations of shutter speeds and aperture values without altering the exposure (p. 53). Safety Shift With and modes, if [Safety Shift] is turned [On] in the Rec. menu, the shutter speed or aperture value is automatically adjusted for the correct exposure when it cannot be otherwise obtained. Safety Shift is disabled when the flash is enabled. 45