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Canon lens EF 300mm f4L IS USM User Manual

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    							EF300mm f/4L IS USM
    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
    • IS stands for Image Stabilizer.
    • USM stands for Ultrasonic Motor.
    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.
    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
    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
    This Class B digital apparatus complies with Canadian ICES-003.
    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 (→ **).
    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
    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.
    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.
    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
    • 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
    • Make sure the image in the
    viewfinder is stable, then press
    the shutter button the rest of
    the way down to take the
    Set the STABILIZER switch
    to .
    •If you are not going to use the
    image stabilizer function, set
    the switch to         .
    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
    • 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.
    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,
    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,
    D30, EOS DCS1, DCS3, D2000, D6000, EOS-
    7/30/33, ELAN 7NE/ELAN 7N/30V/33V, ELAN
    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
    • 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.
    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
    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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