Rubber Ring - Canon EF70-200 mm f/2.8L IS II USM Instructions Manual

1. Mounting and Detaching the Lens
See your camera's instructions for details on
mounting and detaching the lens.
After detaching the lens, place the lens with
● ●
the rear end up to prevent the lens surface and
contacts from getting scratched.
Contacts that are scratched, soiled, or have
● ●
fingerprints on them may result in faulty
connections or corrosion, which may lead to
malfunctions. If the contacts get soiled, clean
them with a soft cloth.
Attach the lens cap and dust cap when
● ●
disconnecting the lens. When attaching the
dust cap, align the lens mount index with the 
index of the dust cap and rotate in a clockwise
direction as shown in the illustration. Follow the
reverse procedure to detach it.
The lens mount has a rubber ring for enhanced
dust- and water-resistance. The rubber ring may
cause slight abrasions around the camera's lens
mount, but this will not cause any problems. If the
rubber ring becomes worn, it is replaceable by a
Canon Service Center at a cost.
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