I decided to try the video function on my MK IV just using the internal mic (audio-manual setting) and during playback I'm hearing the noise from the AF motor which kind of sounds like static. It happens with both of my L lenses so I know it's not a problem with the motor in the lens. I've got a nice Rode shotgun mic but haven't used it yet as I was just trying to get familiar with the basic video functions first. Is this a "normal" phenomenon? Thanks
