Canon RF100mm F2.8 L MACRO IS USM Instructions Manual page 13

Image Stabilizer
The Image Stabilizer for this lens is suited to hand-held shots in the following conditions.
Panning shots of
z
vehicles, trains, etc.
In semi-darkened areas such as indoors or
z
outdoors at night.
In locations where the flash cannot be used,
z
such as art museums and theater stages.
In situations where your footing is uncertain.
z
In situations where fast shutter speed settings
z
cannot be used.
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