Canon EF-S10-18mm f/4.5-5.6 IS STM Instructions Manual page 10

Image Stabilizer
The image stabilizer for this lens is effective for hand-held shots in the following conditions.
ON
In semi-darkened areas such as indoors or
● ●
outdoors at night.
In locations where flash photography is
● ●
prohibited, such as art museums and theater
stages.
In situations where your footing is uncertain.
● ●
In situations where fast shutter settings
● ●
cannot be used.
OFF
ON
When panning subjects in motion.
● ●
OFF
ENG-9