Canon EF 400mm f/4 DO IS II Firmware Update 1.0.9 Released

EF 400mm f/4

Canon released a firmware update for the Canon EF 400mm f/4 DO IS II lens.

Canon EF 400mm f/4 DO IS II firmware 1.0.9 fixes the following:

Fixes a phenomenon, in rare cases, the IS mechanism may cause the image to jump.

You can download the firmware update here.

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