Canon A540 appendix Setting the Aperture, Aperture Value Display

Setting the Aperture

PowerShot A540

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.

!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.

!Some aperture values may not be available with certain zoom positions (p. 47).

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

!The larger the aperture value, the smaller the lens aperture. F2.6 F3.2 F3.5 F4.0 F4.5 F5.0 F5.5 F5.6 F6.3 F7.1 F8.0

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