02 Aug 2012

    To the Users of the EF300mm f/2.8L IS II USM, EF400mm f/2.8L IS II USM, EF500mm f/4L IS II USM, and EF600mm f/4L IS II USM Interchangeable Lenses for Digital SLR Camera

    Thank you for using Canon products.

    Canon has released a firmware update for EF300mm f/2.8L IS II USM, EF400mm F2.8L IS II USM, EF500mm f/4L IS II USM and EF600mm f/4L IS II USM lenses. This firmware update will be performed by Canon Service Centres. Please contact us using the contact information listed at the bottom of this page.

    Firmware changes:
    Firmware Version 1.1.1 incorporates the following enhancement:

    1. Changes the control algorithm of the focus drive, and enhances the drive's responsiveness for more precise focus adjustments. In particular, the new firmware enhances the AI servo AF capability of the lenses to track objects that move irregularly in sports events, such as soccer or rugby.

    Affected Products:
    Firmware Version 1.1.1 is for lenses with Firmware Version 1.0.0. It is not necessary to update the firmware if the lens' firmware is already Version 1.1.1.
    The serial numbers (10 digits) of the lenses equipped with Firmware Version 1.0.0 are as follows:

    EF300mm f/2.8L IS II USM:
    The third digit in the serial number is either 0, 1, 2, or 3 (xx0xxxxxxx, xx1xxxxxxx, xx2xxxxxxx, xx3xxxxxxx).

    EF400mm f/2.8L IS II USM:
    The third digit in the serial number is either 0, 1, 2, or 3 (xx0xxxxxxx, xx1xxxxxxx, xx2xxxxxxx, xx3xxxxxxx).

    EF500mm f/4L IS II USM:
    The third digit in the serial number is 0(xx0xxxxxxx).

    EF600mm f/4L IS II USM:
    The third digit in the serial number is 0 (xx0xxxxxxx).

    Lenses with serial numbers other than those listed above are equipped with Firmware Version 1.1.1 or later.

    Market Support
    For customers who wish to have the firmware of their lenses updated, please bring your lenses to your nearest Canon service centre for a complimentary update.
    We will start accepting requests for firmware updates from August 2, 2012.

    Please contact your nearest service centre on the availability date for servicing.