adamroberts wrote:Focus peaking relies on contrast in the image. It looks for sharp contrast changes that appear when an image is in focus.
Exposure impacts contrast so if you are shooting an under lit scenes you'll not have enough contrast for the peaking to detect.
I get some of that, but I shot some low light stuff today and peaking wasn't showing at just under correct exposure.
However, when I knocked the lens down a couple of stops so there was even less light coming in, the peaking started working really well. Just don't see very consistent behaviour at times.