Canon EF 400mm f/4 DO IS II USM User Guide

EF400mm f/4 DO IS II USM

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Instructions

Thank you for purchasing a Canon product.

	Canon’s EF400mm f/4 DO IS II USM is a high-		removed more easily than before.
	performance super telephoto lens, for use with EOS		5. Ultrasonic motor (USM) for fast, quiet autofocus.
	cameras, which includes a newly-developed DO lens		6. Manual focusing is available after the subject
	(Gapless Dual-Layer Diffractive Optical Element) and		comes into focus in autofocus mode (ONE SHOT
	is designed to be compact and lightweight.		AF).
	OO“DO” stands for Diffractive Optics.		7. An AF stop button to pause autofocus whenever
			desired.
	OO“IS” stands for Image Stabilizer.
			8. A power focus mode enables smooth focus
	OO“USM” stands for Ultrasonic Motor.
			change.
	Features
			9. A focus preset function for advance storage
	1. An optimal combination of DO elements		of focusing positions in memory to allow
			instantaneous focusing.
	providing good compensation of chromatic
			10. Can be used with EF1.4× III/EF2× III extenders.
	aberration and an aspherical element
			11. Attachment slot provided for wire-type security
	providing good compensation of aberrations,
			lock, located under the cover for the orientation
	giving superior definition as well as achieving
			locking knob.
	compactness.
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	2. The Image Stabilizer gives the equivalent effect		12. Tight seal structure provides excellent dustproof
			and drip-proof performance. However, it is unable
	of a shutter speed 4 stops* faster (when using
			to provide complete protection from dust and
	an EOS-1D X).
			moisture.
	Also, a third Image Stabilizer mode effective for
			13. Designed for lighter weight with parts made of
	shooting irregularly moving subjects.
			magnesium alloy.
	3. SWC (Subwavelength Structure Coating)
	reduces flare and ghosting.
	4. Using a fluorine coating on the foremost and		* Based on CIPA (Camera & Imaging Products
	rearmost lens surfaces allows adhered dirt to be		Association) standards.

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Safety Precautions

Handling Cautions							Safety Precautions
OO If the lens is taken from a cold environment into a							OO Do not look at the sun or a bright light source
		warm one, condensation may develop on the lens					through the lens or camera. Doing so could result in
		surface and internal parts. To prevent condensation					loss of vision. Looking at the sun directly through the
		in this case, first put the lens into an airtight plastic bag					lens is especially hazardous.
		before taking it from a cold to warm environment. Then					OO Do not point the lens or camera at the sun or
		take out the lens after it has warmed gradually. Do the					photograph it. This is because the lens concentrates
		same when taking the lens from a warm environment					the sun’s rays even when the sun is outside the image
		into a cold one.					area or when shooting with backlight, which could cause
OO Do not leave the lens in excessive heat such as in a car							malfunction or fire.
		in direct sunlight. High temperatures can cause the					OO Whether it is attached to the camera or not, do not
		lens to malfunction.					leave the lens under the sun without the lens cap
							attached. This is to prevent the lens from concentrating
Conventions used in this instruction							the sun’s rays, which could cause a fire.
							OO When the lens is mounted on a camera, be sure to also
				Warning to prevent lens or camera malfunction			hold the camera by the lens, including when mounting
							on a tripod. Only holding by the camera could result in
				or damage.			scratches on the camera body or the lens itself. The lens
					COPYmay also detach from its mount and fall, causing injury.
				Supplementary notes on using the lens and			OO Do not use a strap attached to the camera. The mount
				taking pictures.			may break, resulting in the lens falling off and causing
							injury or in scratches on the camera. Be sure to use the
							camera with a dedicated strap attached correctly to the
							strap mount on the lens. (Refer to “Attaching the strap”.)
							OO Do not stand on top of the lens case. You may fall and
							injure yourself.
							OO Do not pile lens cases on top of one another as they
							may fall and cause injury.

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Usage Precautions

OO 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.

OO For details on updating firmware, please check the Canon website.

Shooting Precautions

As a characteristic of the diffractive optics with this lens, colored flare may occasionally appear around the light source depending on shooting conditions.

OOFor scenes where a light source is inside the screen, colored flare may occasionally appear as a halo of light

around the light source or appear fanning out from the light source.

OO For scenes where a light source is outside the screen, colored flare may occasionally appear partially inside

COPYthe screen. You can reduce or prevent these issues with the following steps according to the scene you are shooting.

• Attach a lens hood.

• Use your hand or paneling, an umbrella, etc. to block the light source and placed so that they do not appear in the screen.

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Safety Precautions

This device complies with Part 15 of the FCC Rules.	CAN ICES-3(B)/NMB-3(B)
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
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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.

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Nomenclature

Hood mount (→ 15)

Playback ring (→ 10)

AF stop button (→ 8)

Image stabilizer mode selector switch (→ 12)

Image stabilizer switch (→ 12)

Focus preset button (→ 9)

Focus preset switch (→ 9)

Focus mode switch (→ 7)

Focusing ring (→ 7)

Distance scale (→ 15)

Orientation locking knob (→ 18)

Security slot (covered) (→ 18)

Strap mount (→ 6)

Drop-in filter (→ 19)

COPY	Rubber ring (→ 6)
	Contacts (→ 6)
	Lens mount index (→ 6)
	Focusing distance range
	selector switch (→ 7)
	Tripod mount (→ 18)

OOFor detailed information, reference page numbers are provided in parentheses (→ **).

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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 dustand 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.

OOAfter detaching the lens, place the lens with		Attaching the strap
the rear end up to prevent the lens surface and
contacts from getting scratched.
OOIf the contacts get soiled, scratched, or have
fingerprints on them, corrosion or faulty
connections can result. The camera and lens
may not operate properly.	COPY
OOIf the contacts get soiled or have fingerprints on
them, clean them with a soft cloth.
OOIf you remove the lens, cover it with the dust cap.		Thread the end of the strap through the strap
To attach it properly, align the lens mount index
and the  index of the dust cap as shown in		mount on the lens and then back through the
the diagram, and turn clockwise. To remove it,		clasp on the strap. Pull the strap tight and check
reverse the order.		that there is no slack in the clasp.

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2. Setting the Focus Mode 3. Switching the Focusing Distance Range

OOTo shoot in autofocus (AF) mode, set the focus

mode switch to AF.

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OOTo shoot in manual focus (MF) mode, set the

You can set the focusing distance range with a

switch. By setting a suitable focusing distance

focus mode switch to MF, and focus by turning

range, the actual autofocusing time will be

the focusing ring. The focusing ring always

shorter.

works, regardless of the focus mode.

OOTo shoot in power focus (PF) mode, set the

Ranges

focus mode switch to PF when the focus

FULL

preset switch (p. 9) is at OFF. For detailed

(3.3 m/10.83 ft. - ∞)

information, see “6. Power Focus (PF) Mode”

3.3 m/10.83 ft. – 8 m/26.25 ft.

(p. 11).

8 m/26.25 ft. - ∞

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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