Canon Powershot SD890 IS DIGITAL ELPH User Manual page 75

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Camera shake may not be fully corrected when shooting
with slow shutter speeds, such as with evening shots. Use of
a tripod is recommended.
If camera shake is too strong, it may not be fully corrected.
Hold the camera horizontally while [Panning] (stabilization
does not work when the camera is held vertically).
If you shoot a movie after setting [IS Mode] to [Shoot Only]
or [Panning], the setting will change to [Continuous].