Canon PowerShot A640 Digital Camera User Manual


 
46
You can manually set the shutter speed and aperture to shoot
images.
zWhen 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
zIf you wish to change the exposure, select shutter speed or
aperture using the button, then adjust the value using
the or button.
zIf the zoom is adjusted after these values are set, the
aperture value may change in accordance with the zoom
position (p.44).
zThe 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).