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The Canon EF100–400mm f/4.5–5.6L IS USM
lens is a high-performance telephoto zoom lens
for EOS cameras.
● “IS” stands for Image Stabilizer.
● “USM” stands for Ultrasonic Motor.
Features
1. The Image Stabilizer gives the equivalent
effect of a shutter speed two stops* faster. A
second image stabilizer mode that is
optimized for continuous shooting (MODE 2)
is provided.
2. Fluorite and super UD lens elements for truly
exceptional imaging capability.
3. Ultrasonic motor (USM) for fast, quiet
autofocus.
4. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
5. Adjustable zoom ring touch lets you lock at
any focal length.
6. Can be used with EF1.4× II/EF2× II
extenders.
* Based on [1/focal length] second.
Generally, it requires a shutter speed [1/focal length]
second or faster to prevent camera shake.
Conventions used in this instruction
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.
Thank you for purchasing a Canon product.
Handling Cautions
● 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.
● Do not leave the lens in excessive heat such as in a
car in direct sunlight. High temperatures can cause
the lens to malfunction.
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