Home > Canon > Lens > Canon lens EF 1740mm f4L USM User Manual

Canon lens EF 1740mm f4L USM User Manual

    Download as PDF Print this page Share this page

    Have a look at the manual Canon lens EF 1740mm f4L USM User Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 1335 Canon manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.

    							EF17-40mm f/4L USM
    Thank you for purchasing a Canon product.
    The Canon EF17-40mm f/4L USM is a high-
    performance wide-angle zoom lens.
    •“USM” stands for Ultrasonic Motor.Features
    1. Two aspherical elements and a Super UD
    element result in outstanding image
    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.
    •Since the front element of this lens moves when
    focusing (zooming), you need to attach a Canon
    PROTECT filter sold separately for adequate
    dust- and water-resistant performance. Without
    a filter, the lens is not dust or water-resistant.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)
    Focusing ring (→ 5) Gelatin filter holder (
    → 8)
    Filter mounting
    thread (→ 7) Zoom ring (→ 5)
    or detailed information, reference page numbers are provided in parentheses ( →**).
    See your camera’s instructions for details on
    mounting and detaching the lens.
    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 
    K index of the dust cap as shown
    in the diagram, and turn clockwise. To remove it,
    reverse the order.
    3. Zooming
    To  zoom, turn the lens’ zoom ring.
    Be sure to finish zooming before focusing.
    Changing the zoom ring after focusing can affect
    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.
    2. 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
    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
    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
    focusing 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 when you take the picture.
    5. Infrared Index
    Some EOS cameras cannot use infrared film. See
    the instructions for your EOS camera.
    You can attach filters to the filter mounting thread
    on the front of the lens.
    7. Filters (Sold separately)
    •T o ensure dust- and water-resistant
    performance, attach a Canon PROTECT filter
    • Only one filter may be attached.
    • If you need a polarizing filter, use the Canon
    Circular Polarizing Filter (77mm).
    6. Hood
    The EW-83E 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.
    There is a gelatin filter holder at the rear of the
    lens. Cut the gelatin filter to fit within the white
    frames. Then insert the gelatin filter into the filter
    8. Filter Holder
    Only one filter can be used.
    • When you use a gelatin filter, ghosting may
    appear in the image.
    You can attach Extension Tube EF12 II or EF25
    II for magnified shots. The shooting distance and
    magnification are shown below.
    9. Extension Tubes 
    (Sold separately)
    Camera-to-Subject  Magnification
    Distance (mm)
    Near Far Near Far
    EF12 II17mm 155 159 0.83 ×0.70×
    40mm 206 271 0.59 ×0.32×
    EF25 II17mm Incompatible
    40mm 196 218 1.02 ×0.70×
    Manual focusing is recommended for accurate
    10. 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 40mm end (magnification
    0.30x - 0.08x)
    • Close-up Lens 250D cannot be attached
    because there is no size that fits the lens.
    • Manual focusing is recommended for accurate
    All Canon manuals Comments (0)

    Related Manuals for Canon lens EF 1740mm f4L USM User Manual