Thanks for the reply. It is not a backfocus problem, the cam focuses correctly along the zoom. I’m carrying out some tests. For the moment, shutter in 1/500 seems to solve most of the problem with slow camera movements. I will post more information when available. I was used to 50p and the 50i of the camera is not so good (a lot of grain) because of that my initial confusion. Now working in 25p.