Canon PowerShot A550 User Manual page 90

52
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Adjusting the ISO Speed
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Raise the ISO speed to use a fast shutter speed when you wish to
reduce the effects of camera shake or avoid blurry subjects, or to
turn the flash off when shooting in a dark area.
Press the ISO button to cycle
through ISO settings.
• You can advance to the next option
each time you press the button: ~*/
~/~/~/~V~/HI.
* Default setting.
• When in fB) shooting mode, only ~ or ~ can be
selected.
• fJiI and ~ are not available in long shutter mode (p. 45).
• Selecting ~ (Auto) sets the optimal ISO speed according to
the light level when shooting. Since the ISO speed setting
will automatically be raised in dark places, the camera will
select a faster shutter speed and reduce the chances of
camera shake.
• Selecting
~
(High ISO Auto)* sets the sensitivity to a
higher value than the ~ setting. This sets the shutter speed
faster, reducing the potential for camera shake or blurry
subjects compared with the ~ setting.
*
Noise in the recorded image may be higher than for the
~
setting.