PowerShot A640/A630 Camera User Guide Camera User Guide Advanced

You can manually set the shutter speed and aperture to shoot

images.

z When you press the shutter button halfway, the difference

between the standard exposure* and the selected exposure

appears on the LCD monitor. If the difference is more than ±2

stops, “–2” or “+2” appears in red.

* Standard exposure levels are calculated by measuring light according to

the currently selected metering mode.

Manually Setting the Shutter Speed

and Aperture

Shooting Mode

z If you wish to change the exposure, select shutter speed or

aperture using the button, then adjust the value using

the or button.

z If the zoom is adjusted after these values are set, the

aperture value may change in accordance with the zoom

position (p.44).

z The LCD monitor’s brightness matches the selected shutter

speed and aperture value. When you select a fast shutter

speed or shoot a subject in a dark place, the image will

always be bright if the flash is set to (Flash on, with

red-eye reduction) or (Flash on).