Recently I noticed that during playback of some video I shot on my Canon 7D, there were portions where the camera could be heard rattling and vibrating which resulted in blurry video all the while the sound could be heard in the video. Then shortly the video looked and sounded normal. I checked all the video for that day and all the clips have the same issue. I have barely used the camera and am thinking that I'm probably doing something wrong. Camera was in MF mode in a cage with a follow focus ring apparatus. Any ideas anyone?
