One of the camera’s we use at the studio for production is the Canon 5D mark ll.
Being aware of the benefits that Magic Lantern firmware offers I had not spent anytime with the firmware. A friend who owns a Canon 7D was going to do a shot where he was going to attach a Sennheiser MKE400 Shotgun Mic for DSLR to his camera. This was a good change to use the Magic Lantern firmware for better audio sound and control. Live audio monitoring, full manual audio controls, choose between internal and external microphones are a few of the thing they can provide in their free firmware. check them out, it could improve your filming experience!