We have a concert venue coming up, indoors, theater staging and available theatrical light. Two D7000's, one 5DMKII and possibly a D800.
On the Nikon D7K's, we set the capture to Device Control-on for HDMI capture to maintain exposure if a performer is changing position or light to dark costumed people are moving across the frame etc.
Leaving if off allows the automatic function in camera to shift the imagery from lighter<>darker during a clip which is hell in post and yes, I learned that the hard way back in 2010.
I do not own a Canon, but have another operator who will help out and I'd like to know if there an equivalent mode on the 5DMKII?
I spoke with a DP pal about mixing the two brands in post and he said generally to use the neutral settings for both but I forgot to ask him about the Canon auto settings, and he's on an assignment now.