It’s hacky and requires some fiddling, but EOS 5D Mark II owners interested in maxing out their video abilities will want to check out the new Magic Lantern firmware developed by Trammell Hudson. The new code adds a tons of features, including on-screen audio meters, audio and video gain control with the option to disable the auto settings, zebra stripe masking of overexposed areas, and on-screen aspect ratio overlays — and what’s more, it’s billed as an “open platform,” so there should be many more plugins and tweaks forthcoming
Original post:
Magic Lantern EOS 5D Mark II firmware tweaks video mode, adds more manual controls