Why is my EF 24-105 with IS on so noisy, even with external attached mic? Hard to record clean audio

[1949willys]

I'm trying to record audio while shooting video with my 5D Mark III, EF 24-105  IS on.  Even with a external attached directional mic I pick up the sound of the IS.  Is this normal or do I just have a very noisy IS system in my lens?  I shoot hand held so it sure would be nice to utilize the IS system.

[cicopo]

I don't shoot video but the IS used in that lens is for stationary objects, not panning. I think you'll get poor results by using it based on my forgetting to turn it off once while shooting motorsports.

[1949willys]

The video looks great useing the IS it's the audio from the noisy IS that is the problem.

[cicopo]

Have you tried shooting a similar video without using the IS? If so and the results aren't as good I'll be very interested in how you're able to use IS while following the scene & movements in it.