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Canon lens EF 2470mm f28L USM User Manual

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    							EF24-70mm f/2.8L USM
    Thank you for purchasing a Canon product.
    The Canon EF24-70mm f/2.8L USM lens is a
    high-performance, standard zoom lens for
    Canon EOS cameras.
    • USM stands for Ultrasonic Motor.Features
    1. Two aspherical elements and a UD elementresult in outstanding image delineation.
    2. Ultrasonic motor (USM) for quick and quiet autofocusing.
    3. Manual focusing is available after the subject comes into focus in autofocus mode (ONE
    SHOT AF).
    4. A truly round aperture hole results in a nicer background blur.
    5. Tight seal structure ensures excellent dust- proof and drip-proof performance.
    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.
    • 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
    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.
    Distance scale (→ 6)
    Focus mode switch (→ 5)
    Lens mount index (→ 4)Contacts (→ 4)
    Hood mount (→ 7)
    Zoom ring (→ 5)
    Filter mounting
    thread (→ 7) Focusing ring (→ 5)
    For detailed information, reference page numbers are provided in parentheses ( →**).
    See your camera’s instructions for
    instructions on mounting and detaching the
    1. Mounting and Detaching the Lens
    The lens mount has a rubber ring for enhanced
    ater- and dust-resistance. The rubber ring may
    cause slight abrasions around the cameras lens
    mount, but this will not cause any problems. If the
    rub ber ring becomes worn, it is replaceable by a
    Canon Service Center at cost.
    • 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.
    3. Zooming
    To   zoom, turn the zoom ring.
    Be sure to finish zooming before focusing.
    Changing the zoom ring after focusing can affect
    the focus.
    2. Setting the 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.
    After autofocusing in ONE SHOT AF mode, focus
    manually by pressing the shutter button halfway
    and turning the focusing ring. (Full-time manual
    f ocus)
    4.Infinity Compensation Mark
    Infinity compensation markDistance index
    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.
    5. Infrared Index
    The infrared index corrects the focus setting when using
    monochrome infrared film. Focus on the subject
    manually, then adjust the distance setting by moving the
    f ocusing ring to the corresponding infrared index mark.
    • The infrared index position is based on a
    wav elength of 800 nm.
    • The compensation amount differs depending on
    the focal length. Use the indicated focal length
    as a guide when setting the compensation
    • Be sure to observe the manufacturer’s
    instructions when using infrared film.
    • Use a red filter also when you take the picture.
    Some EOS cameras cannot use infrared film. See
    the instructions for your EOS camera.
    ou can attach filters to the filter mounting thread
    on the front of the lens.
    6. Hood
    • Only one filter may be attached.
    • If you need a polarizing filter, use the Canon
    Circular Polarizing Filter (77mm).
    •T o adjust the polarizing filter, first remove the
    lens hood.
    The EW-83F hood can keep unwanted light out
    of the lens, and also protects the front of the lens
    from rain, snow, and dust.
    To   attach the hood, align the hood’s attachment
    position mark with the red dot on the front of the
    lens, then turn the hood as shown by the arrow
    until the lens red dot is aligned with the hoods
    stop position mark.
    The hood can be reverse-mounted on the lens
    for st orage.
    •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 not grasp the rim of the hood to
    turn it.
    7. Filters (Sold separately)
    You can attach Extension Tube EF12 II or EF25
    II for magnified shots. The shooting distance and
    magnification are shown below.
    8. Extension Tubes 
    (Sold separately)
    Camera-to-Subject  Magnification
    Distance (mm)
    Near Far Near Far
    EF12 II24mm 222 234 0.63 ×0.50×
    70mm 305 560 0.49 ×0.18×
    EF25 II24mm Incompatible
    70mm 279 366 0.75 ×0.40×
    Manual focusing is recommended for accurate
    9. Close-up Lenses 
    (Sold separately)
    Attaching a 500D (77mm) Close-up Lens
    enables close-up photography.
    The magnification will be as follows: • Can be used at the 70mm end (magnification
    0.40x - 0.13x)
    • Close-up Lens 250D cannot be attached
    because there is no size that fits the lens.
    • Manual focusing is recommended for accurate
    10. Specifications
    Focal Length/Aperture24 – 70 mm f/2.8
    Lens Construction13 groups, 16 elements
    Minimum Aperturef/22
    Angle of ViewDiagonal: 84° – 34° Vertical: 53° – 19° 30’ Horizontal: 74° – 29°
    Min. Focusing Distance0.38 m/1.25 ft.
    Max. Magnification and  0.29× (at 70 mm),
    Field of Viewapprox. 212 ×322 mm – 83  ×122 mm / 8.3  ×12.6 inch – 3.3  ×4.8 inch (at 0.38 m )
    Filter Diameter 77 mm
    Max. Diameter and Length83.2 ×123.5 mm / 3.3  ×4.8 inch
    W eight 950 g / 33.3 oz
    Hood EW-83F
    Lens CapE-77U
    Case LP1219
    •The lens length is measured from the mount surface to the front end of the lens. Add 21.5 mm
    when including the lens cap and dust cap.
    • The size and weight listed are for the lens only, except as indicated.
    • The EF1.4X II/EF2X II extenders cannot be used with this lens.
    • Aperture settings are specified on the camera.
    • All data listed is measured according to Canon standards.
    • Product specifications and appearance are subject to change without notice.
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