Canon announces Firmware Update for 300mm, 400mm, 500mm and 600mm IS II USM Lenses

canon_EF300mm_f28l_IS_II_USM.jpgCanon has released a firmware update (version 1.1.1) for their 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 is designed to change the algorithms controlling the focus drive to make their responsiveness more precise; and enhances the AI servo capability of the lenses to track objects that move irregularly.

If you're shooting sports, you'll probably want to let Canon perform this update, which requires a trip to a Canon Service Center.

The new Firmware Version 1.1.1 is for lenses with Firmware Version 1.0.0. If your lens firmware is already Version 1.1.1, it is not necessary to update the firmware. 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 already equipped with Firmware Version 1.1.1 or later.
 
See the complete Canon Product Advisory here.