I have the EF 300 2.8 L II IS, and I want to upgrade the firmware from v.1.0.0 to v.1.1.1, which can be done through either the 5D3 or the 1DX.
Anybody know If the firmware is downloadable from somewhere? I cannot find it anywhere.
I can find though the firmware for the EF 40mm 2.8 lens. So Canon think it is ok for us to upgrade the 40mm ourself, but want to ruin us in shipping cost when sending the 300 II + 5D3 to service repair centre?
Kinda stupid that I should have to ship both my 5D3 and the lens, which is very costly and time consuming, to be able to upgrader the lens, when I can do the exact same procedure from home!! I mean why did Canon include this option in menus (to upgrade fw on lens through camera) when they do not release firmware files to the public??