Canon EF 100-400mm f/4.5-5.6L IS USM User manual

ENG
Instructions

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Thank you for purchasing a Canon product.
Canon RF100-400mm F5.6-8 IS USM is a
telephoto zoom lens for use with EOS R series
cameras.
z“IS” stands for Image Stabilizer.
z“USM” stands for Ultrasonic Motor.
Camera Firmware
Please use the latest version of firmware with the
camera in use. For details on whether the firmware is
the latest version or not, and for details on updating
the firmware, please check the Canon website.
Conventions used in these instructions
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.

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Precautions to ensure that the camera is used
safely. Read these precautions thoroughly. Make
sure all details are observed in order to prevent
risks and injury to the user and other people.
Warning
Details pertaining to risks that may
result in death or serious injury.
zDo not look directly at the sun or other strong
light sources through a lens. This may result in
loss of sight.
zDo not leave a lens in the sun without the lens
cap attached. The lens may concentrate entering
sunlight and cause a malfunction or fire.
Caution
Details pertaining to risks that
may result in injury or damage to
other objects.
zDo not leave the product in places exposed to
extremely high or low temperatures. The product
may cause burns or injury when touched.
zDo not insert your hand or fingers into the
product. This may result in injury.
Safety Precautions

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Handling Precautions
zDo not leave the product in excessive heat such as
in a car in direct sunlight. High temperatures can
cause the product to malfunction.
zIf 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.
zThe lens interior may appear to waver, but this
does not indicate a defect or failure, and will not
cause any problems in use.
zIn order to optimize aperture control, there are
occasions in which the diaphragm blades will
move during zooming and focusing, even when
the aperture value is set for aperture priority AE or
manual exposure, etc.
zPlease also read any lens related handling
precautions listed in your camera’s instruction
manual.
General Precautions

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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.
CAN ICES-3 (B) / NMB-3 (B)

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Filter mounting thread
(→15)
Focus mode switch (→7)
Image stabilizer switch (→11)
Zoom ring lock lever (→9)
Hood mount (→13)
Control ring (→10)
Zoom ring (→8)
Contacts (→6)
Lens mount (→6)
Lens mount index (→6)
Zoom position
index (→8)
Focusing ring (→7)
zFordetailedinformation,referencepagenumbersareprovidedinparentheses(→**).
Nomenclature

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Lens mount index
Lens release button Dust cap
Attaching the Lens
Align the lens mount indexes of the lens and
camera, and turn the lens clockwise until you
hear a click.
Detaching the Lens
Turn the lens counterclockwise while pressing
the camera’s lens release button. Detach the
lens once it has stopped turning.
Please refer to the camera’s instructions for
details.
zSet the camera’s power switch to OFF when
attaching or detaching the lens.
zAttach the lens cap before detaching the lens
from the camera.
zAfter detaching the lens, place the lens with the
rear end up and attach the dust cap to prevent
the lens surface and contacts from getting
scratched. Make sure the lens and dust cap
mount indexes are aligned when attaching the
dust cap.
zContacts 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.
1. Attaching and Detaching the Lens

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2. Setting the Focus Mode
Focusing ring
Focus mode switch
To shoot in autofocus (AF) mode, set the focus
mode switch to AF.
To use only manual focusing (MF), set the focus mode
switch to MF, and focus by turning the focusing ring.
zQuickly turning the focusing ring may result in
delayed focus.
zThe lens’ focusing ring is electronic.
zWith a camera capable of electronic full-time
manual focus, manual focusing is always
possible whenever camera operations are
possible. However, this requires a change in
camera settings.
zWhen AF operation is set to [ONE SHOT],
manual focus is possible after autofocusing
has been completed by continuing to press the
shutter button halfway. However, this requires a
change in camera settings.
Please refer to the camera
’ s instructions for details.

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3. Zooming
To zoom, turn the zoom ring.
Minimum focusing distance: changes
according to the focal length.
Focal length Minimum
focusing distance Magnification
100 mm 1.2 m / 3.94 ft. 0.09x
200 mm 0.88 m / 2.89 ft. 0.24x
300 mm 0.95 m / 3.12 ft. 0.34x
400 mm 1.05 m / 3.44 ft. 0.41x
zBe sure to finish zooming before focusing.
Zooming after focusing can affect the focus.
zOnce a close-up subject is in focus, zooming
may cause the subject to come out of focus.
In this instance, move back from the subject and
refocus.
zBlurring may temporarily occur if the zoom ring
is quickly turned.
zPlease be careful not to let your fingers get
caught in between the lens portion that extends
and the lens body when zooming.

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4. Fixing the Zoom Ring
The zoom ring can be fixed to keep the lens at the shortest point. This function is convenient for
carrying a camera on a strap because it prevents the lens from extending.
2Slide the zoom ring lock
lever in the direction
indicated by the arrow.
zTo release the zoom ring, slide
the zoom ring lock lever in the
direction opposite to the arrow.
1Turn the zoom ring to
the wide end position
(100 mm).
zThe zoom ring cannot be fixed in place at any position other than
the wide end position.

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The control ring can be assigned the functions
that are commonly used with cameras, such as
shutter speed and aperture settings.
Control ring
The click action of the control ring allows you to
have a sense of how much it is being turned.
Please refer to the camera’s instructions for
details on how to use the control ring.
zThere are cases in which the sound of control
ring operations may be recorded when shooting
movies.
zThe clicking sensation of the control ring can
be removed by the Canon Service Center.
(chargeable)
5. Control Ring

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6. Image Stabilizer
Image stabilizer switch
Set the image stabilizer switch to ON when you
want to use the Image Stabilizer.
zThis function provides image stabilization
appropriate for shooting conditions (such as
shooting still subjects and panning shots).
zThe Image Stabilizer will work in combination
with cameras with in-body Image Stabilizer.
zSet the image stabilizer switch to OFF when
you are not going to use the Image Stabilizer.
zThe Image Stabilizer cannot compensate for a
blurred shot caused by a subject that moved.
zThe Image Stabilizer may not be fully effective
if you shoot from a violently shaking vehicle or
other transportation.
zIf using a camera that allows you to change
the shutter mode setting, [Elec. 1st-curtain] or
[Electronic]settingsisrecommended*toallow
the Image Stabilizer to be fully effective.
* Whenusingan EOSRcamera, selecteither
[Mode 1] (default factory setting) or [Mode
2] in the [Silent LV shoot.] settings, or select
[Enable] in the [Silent shutter] settings.
zWhen using a tripod, it is recommended that you
set the image stabilizer switch to OFF.
zEven with a monopod, the Image Stabilizer will
be as effective as during hand-held shooting.
However, depending on the shooting conditions,
there are cases in which the Image Stabilizer
effect may be less effective.

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The Image Stabilizer for this lens is suited to hand-held shots in the following conditions.
Image Stabilizer
zIn semi-darkened areas such as indoors or
outdoors at night.
zIn locations where the flash cannot be used,
such as art museums and theater stages.
zIn situations where your footing is uncertain.
zIn situations where fast shutter speed settings
cannot be used.
zPanning shots of vehicles, trains, etc.
It compensates for vertical camera shake during panning shots in a
horizontal direction, and compensates for horizontal camera shake
during panning shots in a vertical direction.

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The custom lens hood reduces unwanted light that causes flare and ghosting and protects the front
of the lens from rain, snow, and dust.
7. Hood
Attachment position mark
Stop position markAttachment position mark
Red dot
Red dot
Red dot
Attaching the Hood
Align the red attachment position mark on the
hood with the red dot on the front of the lens,
and then turn the hood in the direction of the
arrow until you hear a click.
Button
Detaching the Hood
Keep your finger pressed down on the button
located on the side of the hood, and then turn
the hood in the direction of the arrow until the
attachment position mark on the hood is aligned
with the red dot on the front of the lens to detach
it.
The hood can be reverse-mounted on the lens
for storage.
zIf the hood is not attached properly, vignetting (darkening of the perimeter of the picture) may occur.
zGrasp and turn the base of the hood when attaching and detaching it. There are cases in which it may
become deformed if the hood is turned with it grasped near to the rim.

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Use an extender RF1.4× or RF2× to shoot a larger image of a subject. Lens specifications when
using an extender are as follows.
RF1.4x WIDE TELE RF2x WIDE TELE
Focal length (mm) 140 560 Focal length (mm) 200 800
Aperture f/8-45 f/11-64 Aperture f/11-64 f/16-91
Angle of view
Horizontal 14°40’ 3°40’
Angle of view
Horizontal 10°00’ 2°35’
Vertical 9°50’ 2°25’ Vertical 7°00’ 1°40’
Diagonal 17°35’ 4°25’ Diagonal 12°00’ 3°05’
Maximum magnification (x) 0.12 0.58 Maximum magnification (x) 0.18 0.83
zAttach the extender to the lens, and then attach the lens to the camera. To detach it, reverse the order.
zExtenders cannot be used more than one at a time.
zThe range-finding area for this lens will differ depending on the combination of camera and extender in use.
Please check the Canon website for further details.
zWhen an extender is attached, the AF speed will become slower to retain proper control.
8. Extenders (Sold separately)

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9. Filters (Sold separately)
You can attach filters to the filter mounting thread
on the front of the lens.
zOnly one filter may be attached.
zIf you need a polarizing filter, use the Canon
Circular Polarizing Filter PL-C B.
zDetach the hood when adjusting the polarizing
filter.

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Specifications
Focal Length/Aperture 100 - 400mm f/5.6 - 8
Lens Construction 9 groups, 12 elements
Maximum Aperture f/5.6 - 8
Minimum Aperture f/32 - 45
Angle of View Horizontal: 20° - 5°10’, Vertical: 14° - 3°30’, Diagonal: 24° - 6°10’
Min. Focusing Distance 0.88m/2.89ft.(at200mm)*
Max. Magnification 0.41x (at 400 mm)
Field of View Approx. 260 x 386 mm/10.24 x 15.20 in. (at 100 mm, 1.2 m/3.94 ft.)
Approx. 57 x 85 mm/2.24 x 3.35 in. (at 400 mm, 1.05 m/3.44 ft.)
Filter Diameter 67 mm
Max. Diameter and Length Approx. 79.5 x 164.7 mm/3.13 x 6.48 in.
Weight Approx. 635 g/22.4 oz.
Hood ET-74B (sold separately)
Lens Cap E-67 II
Case LP1224 (sold separately)
*Changesaccordingtothefocallength.Pleaserefertothe “3. Zooming” page for details.

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Specifications
zThe lens length is measured from the lens mount surface to the front end of the lens.
Add 24.2 mm/0.95 in. when including the lens cap and dust cap.
zThe maximum diameter, length and weight listed are for the lens itself only.
zClose-up Lens 250D/500D cannot be attached because there is no size that fits the lens.
zAll data listed is measured according to Canon standards.
zProduct specifications and appearance are subject to change without notice.
zWhen the aperture is changed from the maximum aperture by an amount equivalent to one click
only, the display of the aperture value may not change or may change by two clicks in some
cases. This phenomenon is due to restrictions related to the display of the aperture values, but the
actual exposure control is being performed properly.

CT1-D200-A 2106SZ © CANON INC. 2021