Canon EF300mm f/2.8L IS II USM Instructions Manual page 13

8. Tips on Using the Image Stabilizer
The image stabilizer for this lens is effective for hand-held shots in the following conditions.
MODE 1
O
ON
In semi-darkened areas such as indoors or
O O
outdoors at night.
In locations where flash photography is
O O
prohibited, such as art museums and theater
stages.
In situations where your footing is uncertain.
O O
In situations where fast shutter settings
O O
cannot be used.
OFF
MODE 2
O
ON
When panning subjects in motion.
O O
MODE 3
O
Since camera shake is stabilized only during
O O
exposure, following a subject is easier such as
when shooting a fast and irregularly moving
player during sports photography.
OFF
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