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Canon lens EFS 1785mm f456 IS USM User Manual

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    							EF-S17-85mm f/4-5.6 IS USM
    Thank you for purchasing a Canon product.
    The Canon EF-S17-85mm f/4-5.6 IS USM lens
    is a compact and lightweight standard zoom
    lens equipped with an Image Stabilizer. It has
    been developed for EOS cameras*
    compatible with EF-S lenses.
    ¡“IS” stands for Image Stabilizer.
    ¡“USM” stands for Ultrasonic Motor.Features
    1. The Image Stabilizer gives the equivalenteffect of a shutter speed three stops faster*.
    2. Aspheric lens element 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. A truly round aperture hole results in a nicer background blur.
    *Based on [1/(focal length x 1.6)] second. Generally,
    it requires a shutter speed [1/focal length] second or
    faster to prevent camera shake (in 35mm format.
    With an EF-S lens, it would be [1/(focal length x
    1.6)] second).
    Conventions used in this instruction
    Warning to prevent lens or camera
    malfunction or damage.
    Supplementary notes on using the lens
    and taking pictures.
    *Only the following cameras are compatible with
    EF-S lenses (as of August 2012):
    EOS 7D, EOS 60D, EOS 50D, EOS 40D, EOS
    30D, EOS 20D, EOS 20Da, EOS REBEL
    T4i/650D, EOS REBEL T3i/600D, EOS REBEL
    T2i/550D, EOS REBEL T1i/500D, EOS REBEL
    XSi/450D, EOS REBEL T3/1100D, EOS REBEL
    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.
    • 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
    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.
    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.
    Distance scale (→ 5)Contacts (→ 4)
    Focus mode switch
    (→ 4)
    Image stabilizer switch (→ 6) Hood mount
    (→ 9)
    Lens mount index (→ 4)
    Filter mounting 
    thread (→ 8)
    Zoom ring (→ 5) Focusing ring (→ 4)
    Zoom position index (→ 5)
    For detailed information, reference page numbers are provided in parenth\
    eses (
    → **).
    1Mounting and Detaching the Lens
    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  ¢index of the dust cap as shown
    in the diagram, and turn clockwise. To remove
    it, reverse the order.
    2Setting 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
    focusing ring. The focusing ring always works,
    regardless of the focus mode.
    To zoom, turn the lens’ zoom ring.
    Be sure to finish zooming before focusing.
    Changing the zoom ring after focusing can affect
    the focus.
    Infinity compensation markDistance index
    4Infinity 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.
    For accurate manual focusing on subjects at
    infinity distance, look through the viewfinder while
    rotating the focusing ring.
    5Image Stabilizer
    You can use the image stabilizer in AF or MF mode.
    1Set the STABILIZER
    switch to  .
    ¡If you are not going touse the image stabilizer
    function, set the switch to .
    2When you press the
    shutter button
    halfway, the Image
    Stabilizer will start
    ¡Make sure the image inthe viewfinder is stable,
    then press the shutter
    button the rest of the
    way down to take the
    picture.The image stabilizer in this lens
    is effective for hand-held shots
    under the following conditions.
    ¡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.
    In situations where fast shutter
    settings cannot be used. 
    Image Stabilizer
    ¡When you use a tripod, the Image Stabilizershould be turned off to save battery power.
    ¡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 an Extension Tube
    EF12 ll or EF25 ll.
    ¡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.¡The Image Stabilizer cannot compensate for a blurred shot caused by a subject that moved.
    ¡Set the STABILIZER switch to when you are taking pictures using the Bulb setting (long
    exposures). 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:
    • You move the camera for a panned shot.
    • You shoot while riding on a bumpy road.
    ¡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
    button. Do not remove the lens while the
    stabilizer is in operation. This will cause a
    6Filters (Sold Separately)
    You can attach filters to the filter mounting
    thread on the front of the lens.
    ¡Only one filter may be attached.
    ¡If you need a polarizing filter, use the CanonCircular Polarizing Filter (67mm).
    ¡To adjust the polarizing filter, first remove the lens hood.
    7Extension Tubes (Sold Separately)
    You can attach Extension Tube EF12 II or EF25
    II for magnified shots. The shooting distance and
    magnification are shown below.
    Camera-to-Subject  Magnification
    Distance (mm)
    Near Far Near Far
    EF12 II 17mm Incompatible
    85mm 222 656 0.43×
    EF25 II 17mm
    85mm 189 368 0.72× 0.33×
    Manual focusing is recommended for accurate
    8Hood (Sold Separately)
    The EW-73B hood can keep unwanted light out of the lens, and also protec\
    ts the lens from rain,
    snow, and dust.
    To attach the hood, align the hood’s attachment position mark with th\
    e red dot on the front of the
    lens, then turn the hood as shown by the arrow until the lens red dot i\
    s aligned with the hoods stop
    position mark.
    The hood can be reverse-mounted on the lens for storage.
    ¡Part of the picture may be blocked if the hood is not attached properly.\
    ¡When attaching or detaching the hood, grasp the base of the hood to turn\
     it. To prevent deformation, do notgrasp the rim of the hood to turn it.
    ¡When using the cameras built-in flash, remove the hood. Otherwise part \
    of the flash may be obstructed.
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