Canon EF70-200 mm f/2.8L IS II USM Instructions Manual page 4

General Precautions
Handling Precautions
If the lens is taken from a cold environment into a
● ●
warm one, condensation may develop on the lens
surface and internal parts. To prevent condensation
in this case, first put the lens into an airtight plastic
bag before taking it from a cold to warm environment.
Then take out the lens after it has warmed gradually.
Do the same when taking the lens from a warm
environment into a cold one.
Please hold the lens when it is attached to the
● ●
camera. This should also be done while mounting the
camera on the tripod.
Please also read any lens related handling
● ●
precautions listed in your camera's instruction manual.
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