Canon lens EF 1124mm f4L USM User Manual

							EF11-24mm f/4L USM
Instructions
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Thank you for purchasing a Canon product.
Canon’s EF11-24mm f/4L USM is a high-
performance 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 definition.
2.
 SWC (Subwavele

ngth Structure Coating) 
and ASC (Air Sphere Coating) are utilized to 
significantly reduce occurrences of flare and 
ghost created by quite large incident angles of 
light.
3.
 Using a 

fluorine 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
 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 fire.
 ● The EF1

1-24mm 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.
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.
Usage Precautions
 ● When using this lens, please check the Canon website 
for 
the latest camera firmware. If the camera’s firmware 
is not the latest version, be sure to update to the latest 
firmware.
 ● For details 

on updating firmware, please check the 
Canon website.
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Precautions for Shooting
 ●If dirt or dust adheres to the surface of the front lens element, it can easily appear in images due to the 
l
ens’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.
 ● Si

nce 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 viewfinder.
 ● Si

milarly, flare and ghost will occur when bright light sources appear in the image area, depending on 
shooting conditions. In order to prevent flare and ghost, we suggest shooting places such as shaded are 
as so that bright light does not enter the lens.
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This device complies with Part 15 of the FCC Rules. 
Operation is subject to the following two conditions: (1) This 
device may not cause harmful interference, and (2) this 
device must accept any interference received, including 
interference that may cause undesired operation.
Do not make any changes or modifications to the equipment 
unless otherwise specified in the instructions. If such 
changes or modifications should be made, you could be 
required to stop operation of the equipment.
This equipment has been tested and found to comply with 
the limits for a class B digital device, pursuant to part 15 
of the FCC Rules. These limits are designed to provide 
reasonable protection against harmful interference in a 
residential installation. This equipment generates, uses and 
can radiate radio frequency energy and, if not installed and 
used in accordance with the instructions, may cause harmful 
interference to radio communications.
However, there is no guarantee that interference will not 
occur in a particular installation. If this equipment does 
cause harmful interference to radio or television reception, 
which can be determined by turning the equipment off and 
on, the user is encouraged to try to correct the interference 
by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• 
 Increase the 

separation between the equipment and 
receiver.
• 
 Connect the 

equipment into an outlet on a circuit different 
from that to which the receiver is connected.
• 
 Consult the 

dealer or an experienced radio/TV technician 
for help.
 Safety Precautions
CAN ICES-3 (B) / NMB-3 (B)
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Nomenclature
 ● For detailed information, reference page numbers are provided in parentheses (→  **).
Focus mode switch (→ 7)
Distance scale (→ 8)Zoom ring (→ 7)
Rubber ring (→ 6)
Gelatin filter holder (→ 9)
Contacts (→ 6)
Lens mount index (→ 6)
Focusing ring (→ 7)Built-in lens hood
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1. Mounting and Detaching the Lens
See your camera’s instructions for details on 
mounting and detaching the lens.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 cost.
 ● After detaching the lens, place the lens with 
the  rear end up to prevent the lens surface and 
contacts from getting scratched.
 ● If the 

contacts get soiled, scratched, or have 
fingerprints on them, corrosion or faulty 
connections can result. The camera and lens 
may not operate properly. 
 ● If the 

contacts get soiled or have fingerprints on 
them, clean them with a soft cloth.
 ● If you 

remove the lens, cover it with the dust 
cap. To attach it properly, align the lens mount 
index and the   index of the dust cap as shown 
in the diagram, and turn clockwise. To remove it, 
reverse the order.
Please be careful when laying the lens 
sideways. The lens may roll and fall, resulting 
in injury.
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2. Setting the Focus Mode3.  Zooming
After autofocusing in ONE SHOT AF mode, focus manually by pressing the shutter button halfway 
and turning the focusing ring. (Full-time manual 
focus)
To shoot in autofocus (AF) mode, set the focus 
mode switch to AF.
To shoot in manual focus (MF) mode, set the 
focus mode switch to MF, and focus by turning 
the focusing ring. 
The focusing ring always works, regardless of 
the focus mode. To zoom, rotate the zoom ring.
Also, the minimum focusing distance of the lens 
changes depending on focal length.
Focal Length 
(mm) Min. Focusing 
Distance (m/ft) Magnification (×)
11 0.32 / 1.05 0.06
16 0.29 / 0.95 0.10
24 0.28 / 0.92 0.16
 ●Be sure to finish zooming before focusing. 
Zooming 
after focusing can affect the focus. 
 ●Zooming in 

causes the front lens assembly to 
extend along the lens’s optical axis. This adds 
to the weight of the lens assembly, so pointing 
it up or down when zooming in may increase or 
decrease the torque felt in the zoom ring.
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4. InfinityCompensation
Mark
For accurate manual focusing of subjects at infinity, 
look through the viewfinder or look at the magnified 
image* on the LCD screen while rotating the 
focusing ring.
To compensate for shifting of the infinity focus 
point that results from changes in temperature, 
there is a margin at the infinity (∞) position.
The infinity position at normal temperature is the 
point at which the vertical line of the distance 
scale L mark is aligned with the distance index.
Distance indexInfinity compensation 
mark
* For cameras with Live View shooting capability.
5. Infrared Index
 ●
The infrared index position is based on a 
wavelength  of 800 nm.
 ●The compensation 

amount differs depending on 
the focal length. Use the indicated focal length 
as a guide when setting the compensation 
amount.
 ● Be sure 

to observe the manufacturer’s 
instructions when using infrared film.
 ● Use a 

red filter when you take the picture.
Some EOS cameras cannot use infrared film. See 
the instructions for your EOS camera.
The infrared index corrects the focus setting 
when using monochrome infrared film. Focus on 
the subject manually, then adjust the distance 
setting by moving the focusing ring to the 
corresponding infrared index mark.
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6. Lens Cap
The lens cap can be attached by pinching the 
lock knobs and vertically aligning the lens cap 
with the lens hood as shown in the diagram.There is a gelatin filter holder at the rear of the 
lens. Cut the gelatin filter to fit within the white 
frames. Then insert the gelatin filter into the filter 
holder.
7. Filter (Sold separately)
The recessed sections of the lens hood that the 
cap locks on to are located at the front inside edge 
of the top and bottom petals.
Lock knobs
The lens’s rear lens group moves back toward the rear of the lens (camera side) the most when the 
lens is set to the wide end. Therefore, in order to 
prevent the rear lens element from making contact 
with a filter (when installed), we recommend using 
a filter only if the zoom ring is not set to the wide 
end.
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