Canon EF 400mm f/2.8L IS III USM User Guide

EF400mm f/2.8L IS III USM
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Instructions
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.
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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