Magic Lantern unofficial camera firmware shows Canon how it's done
Canon might want to consider putting a certain Trammell Hudson on the payroll. Hudson has developed an enhancement to the firmware of the Canon 5D Mark II digital SLR camera to make the already impressive camera an even more attractive option for shooting professional video. Dubbed ‘Magic Lantern’, the new firmware includes both audio and video fixes and is a completely open platform, meaning users are free to extend the Magic Lantern firmware themselves.
Since the 5D Mark II’s stock firmware was a little lacking in the audio department, that’s the area that Hudson has targeted with the first release, but there are a few video enhancements as well.
The audio enhancements include on-screen audio meters, manual gain control and disabling of automatic gain control (AGC). Video enhancements include crop marks for filming in different formats (16:9, 2.35:1 and 4:3) and zebra striping for overexposed areas.
