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Canon PowerShot S31S User Manual page 62

Canon digital camera user manual

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Aperture
Setting
Display
• The larger the aperture value the smaller the lens opening, allowing
less light to enter the camera.
IF2.7
F3.2 F3.5 F4.0 F4.5 F5.0 F5.6 F6.3 F7.1 F8.0
• You can change the combinations
of shutter speeds and aperture
values without altering the exposure (p. 70).
Safety
Shift
With Tv and Av 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.
M Manually Setting the Shutter Speed and Aperture
You can manually set the shutter speed and aperture to shoot
images.
1
Use the • or 1_ button to select the shutter speed, and
use the • or • button to select the aperture value,
then shoot.
• When you press the shutter button halfway, the difference between
the standard exposure
and the selected exposure appears on the
LCD monitor (or viewfinder). If the difference is more than 2 stops,
"-2" or "+2" appears on the LCD monitor (or viewfinder) in red.
* The standard exposure is calculated by measuring the brightness according
to the selected metering method.
• f the zoom is adjusted after these values are set, the aperture
value or the shutter speed may change in accordance
with
the zoom position.
• The brightness of the LCD monitor (or viewfinder)
matches
the selected shutter speed and aperture value. When you
select a fast shutter speed or shoot a subject in a dark place,
raise the flash, and then set itto _O
(Flash On with red-eye
reduction) or _- (Flash On), the image will always be bright.
6O

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