Canon ef11-24mm f/4l usm Users Manual
EF11-24mm f/4L USM
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Instructions
Thank you for purchasing a Canon product.
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Canon’s EF11-24mm f/4L USM is a highperformance ultra-wide angle zoom lens, for use
with EOS cameras.
● “USM” stands for Ultrasonic Motor.
Features
1. Use of super UD lens elements, UD lens
elements, and two types of aspherical lens
elements giving superior denition.
2. SWC (Subwavelength Structure Coating)
and ASC (Air Sphere Coating) are utilized to
signicantly reduce occurrences of are and
ghost created by quite large incident angles of
light.
3. Using a uorine coating on the foremost and
rearmost lens surfaces allows adhered dirt to be
removed more easily than before.
4. Ultrasonic motor (USM) for fast, quiet autofocus.
5. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
6. Circular aperture for producing beautiful
softfocus images.
7. Tight seal structure provides excellent dustproof
and drip-proof performance. However, it is
unable to provide complete protection from dust
and moisture.
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Safety Precautions
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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, rst 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.
Usage Precautions
● When using this lens, please check the Canon website
for the latest camera rmware. If the camera’s rmware
is not the latest version, be sure to update to the latest
rmware.
● For details on updating rmware, please check the
Canon website.
Safety Precautions
● Do not look at the sun or a bright light source
through the lens or camera. Doing so could result in
loss of vision. Looking at the sun directly through the
lens is especially hazardous.
● Whether it is attached to the camera or not, do not
leave the lens under the sun without the lens cap
attached. This is to prevent the lens from concentrating
the sun’s rays, which could cause a re.
● The EF11-24mm f/4L USM features a large diameter
front lens element. Please be careful because this
large front section will extend past the bottom of some
cameras.
Conventions used in this instruction
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.
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Precautions for Shooting
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● If dirt or dust adheres to the surface of the front lens element, it can easily appear in images due to the
lens’s short focal length. In order to avoid this, please remove dirt or dust from the surface of the front lens
element by using a commercially available air dust blower.
● Since this lens has a wide angle of view, light from bright light sources, such as the sun, can easily enter
the image area. Please do not look at bright light sources using the camera’s viewnder.
● Similarly, are and ghost will occur when bright light sources appear in the image area, depending on
shooting conditions. In order to prevent are and ghost, we suggest shooting places such as shaded are
as so that bright light does not enter the lens.
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