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Canon 300mm 28 Manual

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    							EF300mm f/2.8L IS II USM
    EF400mm f/2.8L IS II USM
    Thank you for purchasing a Canon product.
    Canon’s EF300mm f/2.8L IS II USM and EF400mm 
    f/2.8L IS II USM are high-performance super-
    telephoto lenses, for use with EOS cameras.
    “IS” stands for Image Stabilizer.
    “USM” stands for Ultrasonic Motor.
    1.  The Image Stabilizer gives the equivalent effect 
    of a shutter speed four stops* faster. 
    Also, a third Image Stabilizer mode effective for 
    shooting irregularly moving subjects.
    2.  Use of fluorite lens elements giving superior 
    3.  SWC (Subwavelength Structure Coating) 
    reduces flare and ghosting.
    4.  Using a fluorine coating on the foremost and 
    rearmost lens surfaces allows adhered dirt to be 
    removed more easily than before.
    5.  Ultrasonic motor (USM) for fast, quiet autofocus.
    6.  Manual focusing is available after the subject 
    comes into focus in autofocus mode (ONE 
    SHOT AF).
    7.   An AF stop button to pause autofocus whenever 
    desired. 8.
     A power focus mode enables smooth focus 
    9.  A focus preset function for advance storage 
    of focusing positions in memory to allow 
    instantaneous focusing.
    10.  Circular aperture for producing beautiful 
    softfocus images.
    11.  Can be used with EF1.4× III/EF2× III extenders.
    12.  Attachment slot provided for wire-type security 
    lock, located under the cover for the orientation 
    locking knob.
    13.  Tight seal structure ensures excellent dustproof 
    and drip-proof performance.
    14.  Designed for lighter weight with parts made of 
    magnesium alloy.
    *  Based on [1/focal length] second.
      Generally, it requires a shutter speed [1/focal length] 
    second or faster to prevent camera shake. 
     Safety Precautions
     Safety 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 fire.
    When the lens is mounted on a camera, be sure to also 
    hold the camera by the lens, including when mounting 
    on a tripod. Only holding by the camera could result in 
    scratches on the camera body or the lens itself. The lens 
    may also detach from its mount and fall, causing injury.
    Do not use a strap attached to the camera. The mount 
    may break, resulting in the lens falling off and causing 
    injury or in scratches on the camera. Be sure to use the 
    camera with a dedicated strap attached correctly to the 
    strap mount on the lens.
    Do not stand on top of the lens case. You may fall and 
    injure yourself.
    Do not pile lens cases on top of one another as they 
    may fall and cause injury.
    Conventions used in this instruction
      Warning to prevent lens or camera malfunction 
    or damage.
      Supplementary notes on using the lens and 
    taking pictures.
    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 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 
    •    Consult the dealer or an experienced radio/TV technician 
    for help.
     Safety Precautions
    This Class B digital apparatus complies with Canadian ICES-
    The illustrations used in the explanations in this manual show, with a few exceptions, the EF300mm 
    f/2.8L IS II USM, but the EF400mm f/2.8L IS II USM is used in the same way.
      For detailed information, reference page numbers are provided in parentheses (
    OO → **).
    Distance scale (→  14)
    Orientation locking knob (→ 17)
    Security slot (covered) (→ 17)
    Strap mount (→ 5)
    Focus mode switch (→ 6)
    Contacts (→ 5)
    Lens mount index (→ 5)
    Drop-in filter (→ 18)
    Image stabilizer mode selector switch (→ 11)
    Focus preset switch (→ 8)
    Focusing distance range  selector switch (→ 6)
    Tripod mount (→ 17)
    Focus preset button (→ 8)
    Image stabilizer switch  (→ 11)
    Rubber ring (→ 5)
    AF stop button 
    (→ 7)
    Hood mount (→ 14)
    Playback ring  
    (→ 9)
    Focusing ring (→ 6) 
    1. Mounting and Detaching the Lens
    See your camera’s instructions for details on 
    mounting and detaching the lens.The lens mount has a rubber ring for enhanced 
    dust- and water-resistance. The rubber ring may 
    cause slight abrasions around the camera’s lens 
    mount, but this will not cause any problems. If the 
    rubber ring becomes worn, it is replaceable by a 
    Canon Service Center at cost.
    Attaching the strap
    Thread the end of the strap through the strap 
    mount on the lens and then back through the 
    clasp on the strap. Pull the strap tight and check 
    that there is no slack in the clasp.
    After detaching the lens, place the lens with 
    the rear end up to prevent the lens surface and 
    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. 
    2. Setting the Focus Mode3.  
    Switching the Focusing 
    Distance Range
    After autofocusing in ONE SHOT AF mode, focus 
    manually by pressing the shutter button halfway 
    and turning the focusing ring. (Full-time manual 
    EF300mm f/2.8L IS II USM FULL
    2 m/6.6 ft. – 6 m/19.7 ft. 6 m/19.7 ft. –  ∞
    EF400mm f/2.8L IS II USM FULL
    2.7 m/8.9 ft. – 7 m/23 ft. 7 m/23 ft. –  ∞
    To shoot in autofocus (AF) mode, set the focus 
    mode switch to AF.
    To shoot in manual focus (MF) mode, 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 shoot in power focus (PF) mode, set the 
    focus mode switch to PF when the focus preset 
    switch (p. 8) is at OFF.
    Operating the playback ring enables focus 
    change at a set speed. This is a useful feature 
    for changing focus when shooting movies.
    You can set the focusing distance range with a 
    switch. By setting a suitable focusing distance 
    range, the actual autofocusing time will be 
    4. AF Stop Button
    The AF stop function also works in AI Servo AF 
    Angle positioning of the AF stop button is 
    adjustable by a Canon Service Center at cost.
    With the EOS 630/600, RT, A2/A2E/5, or 10S/10 
    set to the AI Servo AF mode and continuous 
    shooting, AF will not resume even after you 
    let go of the AF stop button. Press the shutter 
    release button halfway to resume AF.
    With the EOS A2/A2E/5 and 10S/10 set to the 
    Sports mode, AF will not resume even after you 
    let go of the AF stop button. Press the shutter 
    release button halfway to resume AF.
    You can change the functions of the AF stop 
    button using the camera’s Custom Function. For 
    details, please refer to the camera’s instructions.
    During autofocus operation, you can press the 
    AF stop button to temporarily pause autofocus.
    If the shutter button is still pressed halfway when 
    the AF stop button is released, autofocusing will 
    continue as before. 
    5. Focus Preset
    By presetting any focusing distance, you can instantly focus at that point even while you are 
    shooting a different subject. This function operates in any of the AF, PF, and MF modes.
    < How to Set >
     Press the focus preset 
    The focused distance will be 
    If the focus preset switch was 
    set to 
    , the beeper will 
    sound once.
      Press the shutter button 
    halfway to focus the 
    distance you want to preset.  Set the focus preset switch 
    to ON or . 
    Focus Preset
    When turning the playback ring, keep your finger 
    away from the shutter button. In One-Shot AF 
    mode, the exposure will be locked when you 
    press the shutter button halfway and focus is 
    achieved. So if you press the shutter button 
    halfway while turning the playback ring, the 
    exposure may not be correct.
    When not using the focus preset, set the switch 
    to OFF.
    The focus preset function will not work while a 
    Live View image is displayed on the camera.
    By turning the playback ring to the left or right, 
    the focus shifts as far as the preset distance.
    Focus will shift freely released of AF focusing 
    while the playback ring is still turned.
    If the focus preset switch was set to 
    OO, the beeper 
    will sound twice.
    In the following cases, the focusing distance scale 
    (p. 14) will move slightly. It will not affect the image.
    • When you press the focus preset button.
    • When you turn the playback ring.
    < How to Focus at the Preset Distance > 
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