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EF100-400mm
f/4.5-5.6L IS USM
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Instruction
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Thank you for purchasing a Canon product.
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.
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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Conventions used in this instruction
Warning to prevent lens or camera malfunction
or damage.
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.
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* Based on [1/focal length] second.
Generally, it requires a shutter speed [1/focal length]
second or faster to prevent camera shake.
Supplementary notes on using the lens and
taking pictures.
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a Safety Precautions
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.
• Consult the dealer or an experienced radio/TV technician for
help.
a 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.
This Class B digital apparatus complies with Canadian ICES-003.
a Precautions for shooting with EOS-1N RS
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
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• When using this lens to shoot with EOS-1N RS, use –2/3 step
or –1/2 step exposure compensation.
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Nomenclature
Hood mount
(→ 12)
Zoom touch adjustment ring (→ 6)
1
0
0
Image stabilizer mode selector switch (→ 7)
Zoom position index
E
N
S
C
F
Filter mounting
thread (→ 12)
Distance scale
(→ 10)
SM
OO
TH
CAN
ON
10
0
ZO
13
5
15
0
TIG
OM
HT
L
Focus mode switch (→ 4)
STAB
MODEILIZER
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1
AF
MF
2
STABIL
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ON
Focusing ring (→ 4)
Image stabilizer switch (→ 7)
For detailed information, reference page numbers are provided in
parentheses (→ **).
IZER
OFF
1.8m
6.5m
Zoom ring
(→ 6)
Contacts
(→ 4)
Lens mount index
(→ 11)
Focusing distance range
selector switch (→ 5)
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1. Mounting and
Detaching the Lens
2. Setting the Focus
Mode
AF
MF
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.
● 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.
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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.
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway
and turning the focusing ring. (Full-time manual
focus)
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1.8m
6.5m
3. Switching the Focusing
Distance Range
You can set the focusing distance range to 1.8
m/5.9 ft. to infinity or 6.5 m/21.3 ft. to infinity. By
setting the suitable focusing distance range, the
actual autofocusing time will be shorter.
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If you use AF from outside the specified focusing
distance range, the lens may stop focusing when it
reaches the limit of the range. This is not a
malfunction. If this occurs, press the shutter button
halfway down again.
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4. Adjusting Zooming Resistance
Move the zoom ring forward or backward to
zoom.
● Be sure to finish zooming before focusing.
Changing the zoom ring after focusing can affect
the focus.
● To prevent unintended extension of the front of
the lens, be careful not to set the zoom ring too
loose.
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You can adjust the zoom ring “touch”
(resistance) as needed by holding the focusing
ring in place and turning the zoom touch
adjustment ring.
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Turn the zoom touch adjustment ring towards the
word SMOOTH to reduce the zooming touch, or
towards TIGHT to increase it. To lock the zoom
ring in place, turn the zoom touch adjustment ring
towards TIGHT until it stops.
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5. Image Stabilizer
You can use the image stabilizer in AF or MF mode.
STABILIZER
ON
OFF
STABILIZER
MODE
1
2
STABILIZER
Set the STABILIZER switch
to ON.
● If you are not going to use the
image stabilizer function, set
the switch to OFF.
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Select the stabilizer mode.
● MODE 1: Corrects vibrations
in all directions. It is mainly
effective for shooting still
subjects.
● MODE 2: Corrects vertical
camera shake during
following shots in a horizontal
direction, and corrects
horizontal camera shake
during following shots in a
vertical direction.
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When you press the shutter
button halfway, the Image
Stabilizer will start operating.
● Make sure the image in the
viewfinder is stable, then
press the shutter button the
rest of the way down to take
the picture.
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6. Tips on Using the Image Stabilizer
The image stabilizer in this lens is effective for hand-held shots under the following conditions.
● MODE 1
● MODE 2
ON
OFF
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● In semi-darkened areas such as indoors or outdoors
at night.
● In locations where flash photography is prohibited,
such as art museums and theater stages.
● In situations where your footing is uncertain.
● In situations where fast shutter settings cannot be
used.
ON
OFF
● When panning subjects in motion.
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Tips on Using the Image Stabilizer
● The Image Stabilizer cannot compensate for a
blurred shot caused by a subject that moved.
● Set the STABILIZER switch to OFF when using the
camera on a tripod. If the switch is set to ON, the
Image Stabilizer may introduce errors.
● Set the STABILIZER switch to OFF when you are
taking pictures using the Bulb setting (long
exposures). If the STABILIZER switch is set to ON,
the image stabilizer function may introduce errors.
● The Image Stabilizer might not be fully effective in
the following cases:
• You shoot from a violently moving vehicle.
• You move the camera dramatically for a panning
shot in Mode 1.
• You shoot using techniques other than following
shots in Mode 2.
● The Image Stabilizer consumes more power than
normal shooting, so fewer shots can be taken if you
use the function.
● The image stabilizer operates for about two seconds
even when your finger is off the shutter button. Do
not remove the lens while the stabilizer is in
operation. This will cause a malfunction.
● With the EOS-1V/HS, 3, ELAN 7E/ELAN 7/30/33,
ELAN 7NE/ELAN 7N/30V/33V, ELAN II/ELAN II
E/50/50E, REBEL 2000/300, IX, IX Lite/IX7, and
D30, the Image Stabilizer will not work during selftimer operation.
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● The stabilizer is equally effective for hand-held
photography and photography with a monopod.
● The image stabilizer function also operates when
the lens is used with an extension tube EF12 II or
EF25 II.
● When using extender EF1.4× II/EF2× II, you can
use the Image Stabilizer with the following cameras:
EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds,
EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark
II, EOS-1D, EOS 40D, 30D, 20D, 20Da, 10D, 5D,
EOS DIGITAL REBEL XSi/EOS 450D, EOS
DIGITAL REBEL XTi/400D DIGITAL, EOS DIGITAL
REBEL XT/350D DIGITAL, EOS DIGITAL
REBEL/300D DIGITAL, EOS D60, D30, EOS DCS1,
DCS3, D2000, D6000, EOS-1V/HS, EOS1N/DP/HS/RS, 3, ELAN 7E/ELAN 7/30/33, ELAN
7NE/ELAN 7N/30V/33V, ELAN II/ELAN II E/50/50E,
3000/88, REBEL XS/500, REBEL 2000/300, REBEL
Ti/300V, REBEL T2/300X, REBEL K2/3000V, IX, IX
Lite/IX7
● Depending on the camera there may be image
shake, such as after releasing the shutter. However,
this does not affect shooting.
● If you set the camera’s Custom Function to change
the assigned button to operate the AF, the Image
Stabilizer will operate when you press the newly
assigned AF button.
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8. Infrared Index
7. Infinity Compensation
Mark
30 50
Infinity compensation mark
30 50
ft
m
10 20
ft
m
10 20
200 135 100
200 135 100
Distance index
To compensate for shifting of the infinity focus
point that results from changes in temperature.
The infinity position at normal temperature is the
point at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
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For accurate focusing in MF on subjects at infinity
distance, look through the viewfinder while rotating
the focusing ring.
The infrared index corrects the focus setting
when using monochrome infrared film.
Focus on the subject in MF, then adjust the
distance setting by moving the focusing ring to
the corresponding infrared index mark.
The intermediate marker between 200 and 135
is 150 mm.
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Some EOS cameras cannot use infrared film. See
the instructions for your EOS camera.
● 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 also when you take the picture.
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9. Using the Tripod Mount
Adjusting the Tripod Mount
By loosening the orientation locking knob on the tripod mount you can rotate the camera to set the
image for any vertical or horizontal position.
Detaching the Tripod Mount
First remove the lens from the camera and then remove the tripod mount from the lens as shown
below. To attach the tripod mount, reverse the procedure.
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Loosen the orientation
locking knob.
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Align the red mark on the
tripod mount with the lens
mount index.
Slide off the tripod collar
away from the rear of the
lens.
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10. Hood
11. Filters
(Sold Separately)
You can attach filters to the filter mounting
thread on the front of the lens.
● Use a polarizing Canon filter (77mm).
● To adjust the polarizing filter, first remove the
lens hood.
The ET-83C hood can keep unwanted light out
of the lens, and also protects the lens from rain,
snow, and dust. Fit the hood to the hood mount,
then turn it in the direction of the arrow to attach
it securely. The hood can be reverse-mounted
on the lens for storage.
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● Part of the picture may be blocked if the hood is
not attached properly.
● When attaching or detaching the hood, grasp
the base of the hood to turn it. To prevent
deformation, do not grasp the rim of the hood to
turn it.
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12. Extension Tubes
13. Close-up Lenses
(Sold Separately)
(Sold Separately)
Attaching a close-up lens 500D (77mm) enables
close-up photography. Magnification is from 0.80
to 0.21 times.
You can attach extension tube EF12 II or EF25
II for magnified shots. The shooting distance
and magnification are shown below.
100mm
400mm
100mm
EF25 II
400mm
EF12 II
Focusing Distance Magnification (×)
Range (mm)
Close
Long
Close
Long
distance distance distance distance
755
1122
0.19
0.12
1569
13224
0.25
0.03
544
666
0.35
0.27
1393
6491
0.31
0.07
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MF mode is recommended for accurate focusing.
● Close-up lens 250D cannot be attached
because there is no size that fits the lens.
● MF mode is recommended for accurate
focusing.
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14. Extenders
(Sold Separately)
Lens specifications when using extender EF1.4× II/EF2× II are as follows.
Item
Focal length (mm)
Aperture
1/3 steps
1/2 steps
100mm
400mm
100mm
400mm
Angle of view Diagonal
Vertical
Horizontal
Maximum magnification (×)
With EF1.4× II Extender
140 – 560
f/6.3 – 45
f/8 – 57
f/6.7 – 45
f/8 – 54
17° 35’ – 4° 25’
9° 50’ – 2° 25’
14° 40’ – 3° 40’
0.28
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With EF2× II Extender
200 – 800
f/9 – 64
f/11 – 81
f/9.5 – 64
f/11 – 76
12° – 3° 5’
7° – 1° 40’
10° – 2° 35’
0.41
● Attach the extender to the lens, and then attach the lens to the camera. To remove it, reverse
the order. Errors may occur if you attach the extender to the camera first.
● When using extender EF1.4× II, the focusing mode is MF mode. However, AF shooting is
possible only with the center focusing point when the camera is EOS-1Ds Mark III, EOS-1Ds
Mark II, EOS-1Ds, EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark II, EOS-1D, EOS1V/HS, or EOS-3.
● When using extender EF2× II, the focusing mode is MF mode.
● Extenders cannot be used more than one at a time.
● Use –1/2 step exposure compensation for EF1.4× II, and –1 step exposure compensation for
EF2× II when shooting with EOS A2/A2E/5.
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Specifications
Focal Length/Aperture
Lens Construction
Minimum Aperture
Angle of View
Min. Focusing Distance
Max. Magnification
Field of View
Filter Diameter
Max. Diameter and Length
Weight
Hood
Lens Cap
Case
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100 – 400 mm f/4.5 – 5.6
14 groups, 17 elements
f/32 – 40 *
Diagonal: 24° – 6° 10’
Vertical: 14° – 3° 30’
Horizontal: 20° – 5° 10’
1.8 m/5.9 ft.
0.2× (at 400 mm)
Approx. 120 × 180 mm/4.7 × 7.1 inch (at 1.8 m/5.9 ft.)
77 mm/2.8 inch
92 × 189 mm/3.6 × 7.4 inch
1380 g/48 oz
ET-83C
E-77U
LZ1324
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* Values shown are for models with aperture settings shown in 1/3-stop increments. For models with 1/2-stop
aperture increments, the values are f/32 to f/38.
• The lens length is measured from the mount surface to the front end of the lens. Add 21.5 mm when including
the lens cap and dust cap.
• The size and weight listed are for the lens only, except as indicated.
• Aperture settings are specified on the camera. The camera automatically compensates for variations in the
aperture setting when the camera is zoomed in or out.
• All data listed is measured according to Canon standards.
• Product specifications and appearance are subject to change without notice.
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© CANON INC. 1998
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