Canon POWERSHOT SD750 DIGITAL ELPH User Manual page 67

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.
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• The camera automatically applies noise reduction
processinr_l,when you shoot at a high ISO speed.
• If or _ is selected, the ISO speed automatically
selected by the camera displays when you press the
shutter button halfway and in the image information during
playback.
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