After updating the 5D Mark 3 to firmware 1.2.1 we noticed that there's a small bug:
- The LCD Brightness function does not work properly when the HDMI is set to "Mirroring".
If you change LCD brightness from "Auto" to "Manual" or vice-versa, and try to change the brightness level it doesn't work properly.
PLEASE FORUM MODERATORS: check this phenomenon and forward this report to Canon for further fix.
Thank you very much in advance.
It seems to happen when using external monitor and "Mirroring" is enabled.
We'll do some more tests to fully confirm
If someone else has also noticed this, please post details.