Lens condensation question

Hello,

In the operating manual that came with my Canon 70-200mm f/2.8L IS USM lens,
there are instructions for bringing the lens from a warm environment to a
cold environment or visa-versa, which may cause condensation in the lens.

Has anyone dealt with that?

The manual says to put the lens in an airtight bag and let it get balanced
to the temperature change before using.

Thanks for your advice, tips, etc.


.

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