Canon 9321A002 User Manual

EF70-300mm f/4.5-5.6 DO IS USM

Instruction

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The Canon EF70-300mm f/4.5-5.6 DO IS USM
is a high-performance, compact telephoto
zoom lens for Canon EOS cameras, equipped
with DO (diffractive optics) lens elements and
an Image Stabilizer.
Innovative DO optical elements combine the
benefits of fluoride elements and aspheric
elements, and contribute to achieving high
quality and compactness.

• "DO" stands for Diffractive Optics.

• "IS" stands for Image Stabilizer.

• "USM" stands for Ultrasonic Motor.

Features

1. DO elements adjust for chromatic aberrations
that tend to occur with telephoto zoom lenses,
and contribute to achieving an innovative
compactness with outstanding image quality.

2. The Image Stabilizer gives the equivalent
effect of a shutter speed three stops faster*.

3. The zoom ring can be fixed to keep the lens at
the shortest point.

4. Ultrasonic motor (USM) for quick and quiet
autofocusing.

5. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).

6. A truly round aperture hole results in a nicer
background blur.

* Based on [1/focal length] second. Generally, it requires

a shutter speed [1/focal length] second or faster to
prevent camera shake.

Thank you for purchasing a Canon product.

Conventions used in this instruction

Warning to prevent lens or camera malfunction
or damage.

Supplementary notes on using the lens and
taking pictures.

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his 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.

•

Consult the dealer or an experienced radio/TV technician for help.

This Class B digital apparatus complies with Canadian ICES-003.

a Safety Precautions

a Shooting Precautions

If a very bright spotlight like a mercury lamp is
photographed in a dark place with this lens, a halo
of light may occasionally appear around the light
source because of the DO elements.

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.

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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Nomenclature

Hood mount (→ 5)

Filter mounting
thread (→ 11)

Focusing ring (→ 4)

Image stabilizer switch (→ 7)
Image stabilizer

mode selector switch (→ 7)

Zoom ring lock lever (→ 6)

Focus mode switch (→ 4)

Distance scale (→ 10)

Zoom ring (→ 5)

Contacts (→ 4)

Lens mount index (→ 4)

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

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1.Mounting and
Detaching the Lens

2.Setting the Focus
Mode

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
electrical 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

K

index of the dust cap as shown
in the diagram, and turn clockwise.To remove it,
reverse the order.

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.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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