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EF400mm f/2.8L IS III USM
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Instructions
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Thank you for purchasing a Canon product.
Canon’s EF400mm f/2.8L IS III USM is an
Image Stabilizer-equipped super-telephoto
lens for use with EOS cameras.
“IS” stands for Image Stabilizer.
“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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Safety Precautions
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.
Do not look directly at the sun or other strong
light sources through a lens or a single-lens reflex
camera with a lens attached. This may result in loss
of sight.
Do not leave a lens in the sun without the lens cap
attached. The lens may concentrate entering sunlight
and cause a malfunction or fire.
Do not point a lens at the sun. Even when the
sun does not appear on the screen, the lens may
concentrate entering sunlight and cause a malfunction
or fire.
Where the lens is mounted on a camera, make sure
to properly support the lens. If you hold only the
camera, the lens may fall off the camera and cause a
malfunction or injury.
Be sure to attach the included strap to the lens
when carrying a camera around with the lens
mounted on it. Using the strap for the camera may
allow the lens to fall off the camera and cause a
malfunction or injury.
Caution Details pertaining to risks that may
result in injury.
Do not leave the product in places exposed to
extremely high or low temperatures. The product may
cause burns or injury when touched.
Only mount the product on a tripod that is
sufficiently sturdy.
Caution Details pertaining to risks that may result in
damage to property.
Do not leave the product in excessive heat such as in a
car in direct sunlight. High temperatures can cause the
product to malfunction.
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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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General Precautions
Handling Precautions
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.
Please also read any lens related handling precautions
listed in your camera’s instruction manual.
Shooting Precautions
The lens’ focusing ring is electronic.
The lens will not focus when the focusing ring is turned
while the camer
a is turned off.
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Nomenclature
Image stabilizer mode selector switch (→ 16)
Image stabilizer switch (→ 16)
Hood mount (→ 19)
AF stop button (→ 10)
Playback ring (→ 11, 14)
Focusing ring (→ 8)
Focus preset button (→ 11)
Focus preset switch (→ 11)
Distance scale (→ 19)
Orientation locking knob
Security slot (covered) (→ 23)
Strap mount (→ 7)
Drop-in filter (→ 24)
Lens mount index (→ 6)
Lens mount (→ 6)
Contacts (→ 6)
Rubber ring (→ 6)
Focus mode switch (→ 8)
Focusing distance range
selector switch (→ 9)
Manual focus speed switch
(→ 15)
Tripod mount (→ 23)
For detailed information, reference page numbers are provided in parentheses (→ **).
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1. Attaching and Detaching the Lens
Set the camera’s power switch to OFF when
Lens mount index
Lens release
button
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.
attaching or detaching the lens.
After 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.
Contacts 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.
The lens mount has a rubber ring to improve
dust-resistance and water-resistance
performance. This rubber ring may cause
friction marks to appear around the camera’s
lens mount, although this will have no effect on
usage.
Since the lens is heavier than the camera, turn
the camera when attaching or detaching the
lens. Ensuring that the lens can rest safely on its
own is recommended, such as first mounting it
on a tripod.
Rubber rings can be replaced at a Canon
Service Center at cost.
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2. Attaching the Strap
Strap mount
Included strap
Thread the end of the strap through the strap
mount on the lens and then back through the
clasp on the strap. Pull the strap tight and check
that there is no slack in the clasp.
Before using the lens, check that the strap is
attached securely, that it is not worn (damaged),
etc.
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3. 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.
See p. 14 for information on power focus (PF).
Quickly turning the focusing ring may result in
delayed focus.
The lens’ focusing ring is electronic.
When AF operation is set to [ONE SHOT],
manual focus is possible after autofocusing
has been completed by continuing to press the
shutter button halfway (Full-time manual focus).
There are times when camera setting changes
are required.
When the AF button assignment is changed from
the “shutter button” (using the camera’s Custom
Function), manual focus is always possible
regardless if the shutter button is pressed
halfway any time the lens is not autofocusing.
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4. Setting the Focusing Distance Range
Focusing distance range selector switch
You can set the focusing distance range with a
switch. By setting a suitable focusing distance
range, the actual autofocusing time will be
shorter.
Focusing distance range
① FULL (2.5 m – ∞)
② 2.5 m – 7 m
③ 7 m – ∞
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5. AF Stop Buttons
You can use the AF stop buttons to temporarily
pause autofocus.
AF stop buttons
During autofocus operation, you can press an
AF stop button to temporarily pause autofocus,
and then release the button to resume.
Press an AF stop button to maintain a focusing
distance or to avoid focus search.
Press the shutter button while holding down
an AF stop button to shoot at that focusing
distance.
Autofocus will not resume even after you let go
of an AF stop button in the following instances.
・Camera:
・Camera: EOS 5, EOS 10
In sports mode
Useful when autofocus is operating mostly in [AI
SERVO].
You can change the function of the AF stop
buttons depending on the camera. Please refer
to the camera's instructions for details.
Angle positioning of the AF stop buttons is
adjustable by a Canon Service Center at cost.
EOS 630, EOS RT, EOS 5, EOS 10
In continuous shooting mode with [AI SERVO]
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6. Focus Preset
By using focus presets, you can turn the playback ring to focus the lens at any preset focusing distance.
To use focus presets, set the focus preset switch to ON or
If set to
Operation differs to set one preset or two presets.
, the lens beeps when being preset and when moving.
.
One Preset
Set one focusing distance.
< Preset the Focusing Distance >
Focus the lens at a focusing distance you
want to preset.
Press the focus preset button to preset the
distance in memory.
< Shoot at the Preset Focusing Distance >
Turn the playback ring left or right to move the
focus to the preset distance.
Press the shutter button while the playback
ring is turned to shoot at that distance.
Beep Sounds (Beeper)
・One beep: When presetting a focusing
distance
・Two beeps: When the focus moves to the
preset focusing distance
Focus preset button
Focus preset switch
Playback ring
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Focus Preset
Two Presets
Hold down the focus preset button to preset two
focusing distances.
< Preset the Focusing Distance >
Focus the lens at a focusing distance you
want to preset.
Hold down the focus preset button (at least
1 second), and then immediately turn the
playback ring left or right to preset the
distance in memory for that direction.
Use the same steps to preset another distance.
< Shoot at the Preset Focusing Distances >
Turn the playback ring left or right to move the
focus to each of the preset distances.
Press the shutter button while the playback
ring is turned to shoot at that distance.
Beep Sounds (Beeper)
・ Two beeps (slow): When button held down
・ One beep: When presetting a focusing
distance
・Two beeps (fast): When the focus moves to
the preset focusing distance
Focus preset button
Hold
down
Focus preset switch
Playback ring
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Focus Preset
When setting two presets, pressing the focus preset button but then not turning the playback ring causes the
lens to beep three times and cancel presetting. Set presets from the start again.
The camera may turn off while setting two presets. Press the shutter button halfway, and then set presets
from the start again.
When not using focus presets, set the focus preset switch to OFF.
With the following camera models, focus presets cannot be used with Live View shooting or movie shooting.
EOS 60Da, EOS REBEL T5/1200D, EOS REBEL T6/1300D, EOS REBEL T7/2000D/1500D, EOS REBEL
T100/4000D/3000D
As well as all EOS cameras released in 2011 and earlier
Focus presets can be used in all focus modes. Focus speed is slow only during movie shooting when the
focus mode is PF, and is fast for all other settings. In slow speed, you can make a 2-step change in focus
speed depending on how much the playback ring is turned.
All focus presets are initially at the lens’ mechanical limit in the infinity direction (not at infinity) when the lens
is mounted on a camera.
Preset focusing distances remain in memory until the lens is detached from the camera.
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7. Power Focus (PF)
By using power focus, you can turn the playback ring to change the focus smoothly.
This is a useful feature for changing focus when shooting movies.
Focus preset switch Focus mode switch
Set the focus preset switch to OFF, and the focus mode switch
to PF.
You can make a 2-step change in power focus speed, depending on how much the playback
ring is turned.
Turn the playback ring
manually to change the
focus.
Playback ring
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8. Manual Focus (MF)
When shooting images using manual focus (MF), you can select the manual focus speed.
Manual focus speed
switch
Use the manual focus speed switch to select a manual focus speed.
Speed is fastest at 1, with 2 and 3 being progressively slower.
Speed 3 is recommended for fine focusing.
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9. Image Stabilizer
Image stabilization corrects vibrations that occurs with hand-held shots.
Image stabilizer switch Image stabilizer mode selector switch Camera shutter button
Set the STABILIZER switch
to ON.
I
f you are not going to use
image stabilization, set the
image stabilizer switch to OFF.
Image Stabilizer modes
MODE 1: Corrects vibrations in all directions. It is suited to shooting still subjects.
MODE 2: When you take a panning shot either horizontally or vertically, corrects vibrations at
MODE 3: During exposure, corrects vibrations in the same way as MODE 2.
right angles to the direction of panning. It is suited to shooting moving subjects.
Since vibration is corrected only during exposure, It is suited to shooting irregularly
moving subjects.
Select an Image Stabilizer
mode according to the
application and shooting
conditions.
Press the shutter button down
halfway. Once you have a
stable image, press down all
the way to take the picture.
* Only MODE 3 does not
allow you to check the effect
gained from stabilization.
*
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10. Tips on Using Image Stabilization
The Image Stabilizer for this lens is suited to hand-held shots in the following conditions.
MODE 1
Shooting still subjects
In semi-darkened areas such as indoors or
outdoors at night.
In locations where a flash cannot be used,
such as art museums and theater stages.
In situations where your footing is uncertain.
In situations where fast shutter speed settings
cannot be used.
MODE 2
Shooting moving subjects
Panning shots of
vehicles, trains, etc.
MODE 3
Shooting irregularly moving subjects
Sports photography
of soccer, basketball,
etc.
Photography of
animals
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Tips on Using Image Stabilization
The Image Stabilizer cannot compensate for a
blurred shot caused by a subject that moved.
The Image Stabilizer might not be fully effective
in the following conditions:
• Large shake or fast vibration
• Panning in MODE 1
Setting the STABILIZER switch to ON consumes
more power than when OFF.
Vibration such as during transport may unlock
the Image Stabilizer and cause rattling, but this
is not breakage and will have no effect on usage.
This will be rectified once the lens has been
mounted on the camera.
Although image stabilization will operate when
using a tripod, depending on the kind of tripod
and shooting conditions, sometimes it may be
better to turn off the Image Stabilizer.
Although image stabilization will operate when
using a monopod, depending on the shooting
conditions, sometimes the Image Stabilizer might
not be fully effective.
Setting the STABILIZER switch to OFF is
recommended when you are taking pictures
using the Bulb setting (long exposures). If the
STABILIZER switch is set to ON, the Image
Stabilizer may introduce errors.
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 self-timer operation.
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 AF button assignment, the Image
Stabilizer will operate when you press the newly
assigned AF button.
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11.
CANON LENS
EF 400mm
Infinity Compensation Mark
12. Hood
Infinity compensation mark
1:2.8L IS Ⅲ USM
Distance scale
Distance index
ft
m
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.
For accurate focusing in MF on subjects at
infinity distance, look through the viewfinder or
at an enlarged image on the LCD monitor* while
turning the focusing ring.
* On cameras capable of Live View shooting
The custom lens hood cuts out unwanted light
and protects the front of the lens from rain,
snow, and dust.
Lock knob
Attaching the Hood
Loosen the hood lock knob by turning it
counterclockwise. Fit the hood onto the lens’s
hood mount, and tighten the lock knob to fix it in
place securely.
To stow the lens, reverse the lens hood and slip
it over the lens.
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13. Lens Cap
The dedicated lens cap protects the front of the lens from shock and dust when the lens is stowed or
not in use.
This lens cap can also be attached to the hood as well as the lens.
Attaching the Lens Cap to the Lens
Attach the lens cap by slipping it directly over the
end of the lens (hood mount) as shown. Draw the
strings to affix the lens cap and prevent it from
coming off easily.
Attaching the Lens Cap to a Hood
Attach the lens cap by slipping it over the end
of the hood as shown. Use the hook and loop
fastener and the strings to affix the lens cap and
prevent it from coming off easily.
Lens
Lens cap
Hook and loop fastener
Hood
Lens cap
0E
8
0E
8
Hook and loop fastener
E-1
Draw strings
E-1
Draw strings
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Lens Cap
Stowing the Lens
Reverse the lens hood and slip it over the lens.
Tighten the hood lock knob to fix the hood in
place securely with the lock knob in a line with
the tripod mount.
Attach the lens cap by slipping it on where the
hood lock knob is located as shown*. Use the
hook and loop fastener and the strings to affix
the lens cap and prevent it from coming off
easily.
* Fasten the hook and loop fastener around the
lock knob.
Tripod mount
Hood
Draw strings
Hook and loop fastener
Lock knob
0E
8
E-1
Lens cap
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14. Case
Use the case to carry the lens.
①
②
④
Fastener
②
③
①
Case
Lid
Attach all cushions inside the case as shown.
① Cushion (U-shaped)*
1
×1
② Cushion (square, small) ×2
③ Cushion (square, large) ×1
④ Cushion (round)*
1
*
Attach ① where it holds the drop-in filter area
of the lens.
2
*
④ is attached to the bottom of the case.
Before stowing the lens, be sure to attach all
cushions inside the case.
The lens should always be stowed in the proper
wa y.
2
×1
②
Drop-in filter
Strap
Tripod mount
Proper Way to Stow the Lens
Attach the dust cap on the lens.
Reverse the lens hood, slip it over the lens,
and then attach the lens cap. See p. 21 for
information on attaching items.
Place the lens in the case, with the tripod
mount closest to you and facing the left as
shown.
Fasten the lens securely with the strap.
Pull the fastener and close the lid.
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15. Tripod Mount
16.
Security Slot
A tripod or monopod attaches to the tripod
mount on the lens.
Switching the Orientation of the Image
By loosening the orientation locking knob on the
tripod mount you can rotate the camera and the
lens to switch the image in any orientation
(vertical, horizontal, etc.).
The mount clicks at 4 positions, every 90°.
Since the tripod mount requires special
fastening, as a safety precaution, do not replace
the mount yourself.
Replacement with a monopod mount (sold
separately) can be done at a Canon Service
Center at cost.
This lens is fitted with a security slot to prevent
theft.
The security slot is located under the cover
for the orientation locking knob. Attach a
commercially-available wire-type security lock
here.
Orientation locking knob
Cover
Security
slot
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17. Drop-In Filters
A 52(WIII)-series Canon drop-in filter can be used with the lens.
Detaching Drop-In Filters
To detach a drop-in filter, press in both lock
buttons and pull the filter holder straight out of
the slot.
Attaching Drop-In Filters
To attach a drop-in filter, push the filter holder
straight down into the slot until it clicks into
place. The filter holder can be attached facing
either forwards or backwards.
A Drop-In Screw-Type Filter Holder 52(WIII) and
Canon PROTECT filter are included with the
lens.
Before using a commercially available lens filter,
first detach the PROTECT filter. The filter size is
52 mm, and only one filter can be used.
PROTECT filter
Drop-In Screw-Type Filter
Holder
Lock buttons
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Drop-In Filters
Because the lens optics are designed to include
a filter, you must always attach either a Canon
PROTECT filter or a commercially available filter
before attaching a Drop-In Screw-Type Filter
Holder.
Note that filter frame thickness may prevent
some commercially available lens filters from
being used.
With EOS cameras that have a built-in flash,
a drop-in filter may come in contact with the
camera. Before attaching/detaching a drop-in
filter, detach the lens from the camera.
The Drop-In Gelatin Filter Holder 52(WIII) and
Drop-In Circular Polarizing Filter PL-C52(WIII)
are also available (sold separately).
The 52/52(WII)-series drop-in filters can also be
used. However, their exterior color is different
than the lens body.
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18.
Extenders (Sold Separately)
19.
Extension Tubes (Sold Separately)
Use an extender EF1.4× III or EF2× III to shoot
a larger image of a subject. Lens specifications
when using an extender are as follows.
Focal length (mm) 560 800
Aperture f/4 – 45 f/5.6 – 64
Angle of view
Maximum magnification (×)
Horizontal 3° 40’ 2° 35’
Vertical 2° 25’ 1° 40’
Diagonal 4° 25’ 3° 05’
Attach the extender to the lens, and then attach
the camera. To detach it, reverse the order.
Errors may occur if you attach the extender to
the camera first.
Extenders cannot be used more than one at a
time.
When an extender is attached, the AF speed will
become slower to retain proper control.
EF1.4× III EF2× III
0.25 0.36
Use an extension tube EF12 II or EF25 II to get
closer to a subject and shoot a larger image.
Lens specifications when using an extension
tube are as follows.
EF12 II
Focusing distance range (mm)
Magnification (×) 0.22 0.03
EF25 II
Focusing distance range (mm)
Magnification (×) 0.30 0.07
MF mode is recommended for accurate focusing.
Close distance Long distance
2192 13105
Close distance Long distance
1946 6330
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Specifications
Focal Length/Aperture 400mm f/2.8
Lens Construction 13 groups, 17 elements
Minimum Aperture f/32
Angle of View Horizontal: 5° 10’ Vertical: 3° 30’ Diagonal: 6° 10’
Min. Focusing Distance 2.5 m/8.2 ft.
Max. Magnification 0.17×
Field of View Approx. 202 × 135 mm/7.95 × 5.31 in. (at 2.5 m / 8.2 ft.)
Filter Any 52(WIII)-series drop-in filter
Max. Diameter and Length Approx. 163 × 343 mm/6.42 × 13.50 in.
Weight Approx. 2840 g/100.2 oz
Hood
Lens Cap E-180E
Case
The lens length is measured from the lens mount surface to the front end of the lens.
The max. diameter × length and weight listed are for the lens only.
The Close-up Lenses 250D and 500D cannot be attached.
Aperture settings are specified on the camera.
All data listed is measured according to Canon standards.
Product specifications and appearance are subject to change without notice.
ET-155 (WIII)
ET-155B (sold separately)
LS400
400E (sold separately)
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CT1-D037-B 1910SZ © CANON INC. 2018
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