15 Mar 2012

    To Users of the EF300mm f/2.8L IS II USM Interchangeable Lens for Digital SLR Cameras

    Thank you for using Canon products.

    It has been confirmed that some EF300mm f/2.8L IS II USM lenses (released in August 2011), when used with the Extender EF 1.4x, Extender EF 1.4xII or Extender EF 1.4xIII, may exhibit back focus.

    Affected Product

    EF300mm f/2.8L IS II USM with the following serial numbers
    Serial numbers of the affected units
    Japan:8210000204, 8210000331, 8210000335, 8210000338, 8410000266, 8410000296, 8410000276, 8410000339, 8410000344, 8410000347, 8410000348, 8410000357, 8410000361, 8410000368, 8410000369, 8510000008, 8510000014, 8520000122, 8520000146, 8520000191, 8520000213, 8520000275, 8520000324, 8520000338, 8520000354, 8520000357, 8520000358, 8520000361, 8520000365, 8520000366, 8520000378, 8520000335, 8520000414, 8520000441, 8620000114, 8620000130, 8620000032
    Europe:8210000517, 8310000393, 8410000171, 8410000172, 8410000220, 8410000223, 8410000227, 8410000259, 8410000399, 8520000032, 8520000107, 8520000114, 8520000115, 8520000139, 8520000158, 8520000165, 8520000434, 8620000030, 8620000038, 8620000039, 8620000048, 8620000054, 8620000055, 8620000056, 8620000057, 8620000058
    USA:8210000089, 8210000436, 8410000443, 8520000035, 8520000068, 8520000078, 8520000079, 8520000086, 8520000110, 8520000163, 8520000167, 8520000183, 8520000190, 8520000195, 8520000217, 8520000289, 8520000295, 8520000311, 8620000036
    Singapore:8310000260, 8310000397, 8310000418, 8520000286, 8520000303, 8520000374
    Hong Kong:8210000109, 8410000157, 8410000255
    Canada:8310000280, 8410000304

    Support
    All affected products will be inspected and serviced free of charge. We appreciate your patience and sincerely apologize for any inconvenience caused. Please contact your nearest service center if you have any queries.