During our performance footage we use an auto focus lens, part of the Nikon D300s which we filmed on. Our reasoning for doing this, other than because we liked the effect, was because we wanted to create the image that it is more about the music then the band image. This idea was used a lot for The Pixies work and we wanted to incorporate this idea in with our video. Below there are two videos which evidence other pieces of work which have used this same concept.
From audience feedback we were told to try and eliminate most of the extreme cases of the auto focus. So we did this but kept some of it when we believed it was appropriate. Overall we are very happy with our performance footage and believe it looks good.