Canon PowerShot G7 PowerShot G7 Camera User Guide Advanced - Page 52

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. 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 When using the control dial, the bar will be displayed and the aperture value can be changed. 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 control dial until the shutter speed display turns to white. z Some aperture values may not be available with certain zoom positions (p. 49). 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 F4.5 F4.8 F5.0 F5.6 F6.3 F7.1 F8.0 z You can change the automatically selected combinations of shutter speeds and aperture values without altering the exposure (p. 69). 50