Canon lens EF 300mm f4L IS USM User Manual

							EF300mm f/4L IS USM
Instruction
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The Canon EF300mm f/4L IS USM lens is a
high-performance telephoto zoom lens for EOS
cameras, and it is equipped with an Image
Stabilizer.
• IS stands for Image Stabilizer.
• USM stands for Ultrasonic Motor.
Features
1. The Image Stabilizer gives the equivalent
effect of a shutter speed two stops faster*.
The lens also has a second image stabilizer
mode that is optimized for following shots of
moving subjects.
2. UD lens elements for excellent imaging performance.
3. Ultrasonic motor (USM) for quick and quiet autofocusing.
4. Manual focusing is available after the subject comes into focus in autofocus mode (ONE
SHOT AF).
5. The lens is compatible with Extender EF1.4X ll and EF2X ll.
*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
War ning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.
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aSafety Precautions
aSafety 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.
•Do not point the lens or camera at the sun or
photograph it. This is because the lens
concentrates the sun’s rays even when the sun is
outside the image area or when shooting with
backlight, which could cause malfunction or fire.
•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
wa rm  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.
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.
• Consult the dealer or an experienced radio/TV technician for
help.
This Class B digital apparatus complies with Canadian ICES-003.
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Nomenclature
Built-in lens hood (→ 10)
Filter mounting
thread (→ 10) Focusing ring (→ 4)
Focusing distance range selection 
switch (→ 5)
Image stabilizer switch (→ 6)
Image stabilizer mode selector switch 
(→ 6) Focus mode switch (→ 4)
Distance scale (→ 5)
Contacts (→ 4)
Tripod mount (→ 9) Lens mount index (→ 4)
Orientation locking knob (→ 9)Distance index (→ 5)
F or detailed information, reference page numbers are provided in parentheses (→ **).
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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 
Kindex of the dust cap as shown
in the diagram, and turn clockwise. To remove it,
reverse the order.
1.Mounting and Detaching the Lens2. Setting 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)
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
f ocusing ring. The focusing ring always works,
regardless of the focus mode.
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4.Infinity Compensation Mark
To  compensate for shifting of the infinity focus
point that results from changes in temperature.
The infinity position at normal temperature is the
point at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
F or accurate manual focusing on subjects at
infinity distance, look through the viewfinder while
rotating the focusing ring.
Infinity compensation mark
Distance index
You can set the focusing distance range to 
1.5 m/4.9 ft. to infinity or 3 m/9.8 ft. to infinity. By
setting the suitable focusing distance range, the
actual autofocusing time can be shorter.
3.Switching the Focusing
Distance Range
If you autofocus outside the set focusing distance
r ange, the lens may stop focusing at the start of
the focusing range; however, this is not a
malfunction. Press the shutter release button
halfway again.
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Y
ou can use the image stabilizer in AF or MF mode.
5. Image Stabilizer Settings
Select the stabilizer mode.
• MODE 1: Corrects vibrations
in all directions. It is mainly
effective for shooting still
subjects.
• MODE 2: It compensates for
ver tical camera shake during
f ollowing shots in a horizontal
direction, and compensates for
horizontal camera shake
during following shots in a
ver tical direction.
When you press the shutter
button halfway, the Image
Stabilizer will start
operating.
• Make sure the image in the
viewfinder is stable, then press
the shutter button the rest of
the way down to take the
picture.
Set the STABILIZER switch
to .
•If you are not going to use the
image stabilizer function, set
the switch to         .
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6. Tips on Using the Image Stabilizer
•In semi-darkened areas such as indoors or
outdoors at night.
• In locations where flash photography is
prohibited, such as art museums and theater
stages.
• In situations where your footing is uncertain.
•I n situations where fast shutter settings cannot
be used. •
When panning subjects in motion.
● MODE 1 ●MODE 2
The image stabilizer in this lens is effective for hand-held shots under the following conditions.
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Tips on Using the Image Stabilizer
•The Image Stabilizer cannot compensate for a
blurred shot caused by a subject that moved.
•
Set the STABILIZER switch  when you are
using a tripod. If the Stabilizer switch is set to ,
the image stabilizer function may introduce errors.
•Set the STABILIZER switch to  when you are
taking pictures using the Bulb setting (long
e xposures). If the STABILIZER switch is set to ,
the image stabilizer function may introduce errors.
• The Image Stabilizer might not be fully effective
in the following cases:
•Y ou shoot while riding on a bumpy road.
•Y ou move the camera dramatically for a
panning shot in Mode 1.
•Y ou shoot using techniques other than
f ollowing shots in Mode 2.
• The Image Stabilizer consumes more power
than normal shooting, so fewer shots can be
taken if you use the function.
•
The image stabilizer operates for about two
seconds even when your finger is off the shutter
bu tton. Do not remove the lens while the stabilizer
is in operation. This will cause a malfunction
.
•With the EOS-1V/HS, 3, ELAN 7E/ELAN 7/30/33,
ELAN 7NE/ELAN 7N/30V/33V, ELAN II/ELAN
IIE/50/50E, REBEL 2000/300, IX, and D30, the Image
Stabilizer will not work during self-timer operation.
• When using a tripod, set the STABILIZER switch
to prevent errors.
• The stabilizer is equally effective for hand-held
photography and photography with a monopod.
• The Image Stabilizer function also operates
when the lens is used with the EF12 II or EF25
II Extension Tube, and the EF1.4X II Extender.
•
With Extender EF2X II attached to the lens, the
Image Stabilizer will work with the following cameras:
EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds,
EOS-1D Mark lll, EOS-1D Mark II N, EOS-1D
Mark II, EOS-1D, EOS 40D, 30D, 20D, 20Da, 10D,
5D, DIGITAL REBEL XSi/450D, DIGITAL REBEL
XTi/400D DIGITAL, DIGITAL REBEL XT/350D
DIGITAL, DIGITAL REBEL/300D DIGITAL, D60,
D30, EOS DCS1, DCS3, D2000, D6000, EOS-
1V/HS, EOS-1N/DP/HS/RS, 3, ELAN 7E/ELAN
7/30/33, ELAN 7NE/ELAN 7N/30V/33V, ELAN
II/ELAN IIE/50/50E, REBEL X/REBEL XS/500,
REBEL G/500N, REBEL 2000/300, REBEL
Ti/300V, REBEL T2/300X, REBEL K2/3000V, IX,
IX Lite/IX7, 3000/88, 5000/888
• Pictures may look distorted after being taken
depending on the camera, but this doesnt affect
shooting.
• If you set the camera’s Custom Function to
change the assigned button to operate the AF,
the Image Stabilizer will operate when you press
the newly assigned AF button.
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7. Using the Tripod Mount
Adjusting the Revolving MountYou can loosen the orientation lock-knob on the tripod mount to allow it to rotate as needed to fit a
particular camera model for switching between vertical and horizontal positions.
DetachingUse the following procedures to remove and attach the tripod mount.
Loosen the orientation
locking knob.
Rotate the tripod mount and
align the mounting indicator
on the tripod mount with the
one on the lens.Slide off the tripod collar
away  from the rear of the
lens.
If the foot of the tripod mount overlaps the switch, loosen the orientation locking knob on the tripod mount to
move the foot.
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