I have a question about shallow focus. In order to achieve this affect (sharp subject, blurred background) using my Cannon HV20 (61mm lens), I zoom in all the way onto my subject (10x) and then get as far away as necessary in order to obtain the correct framing. Unfortunately, this usually results in me having to stand at a ridiculous distance from the subject, which is often impossible when filming inside. Additionally, the most of a person I can frame using this technique is head and shoulders.
So I am wondering: in a Hollywood movie production, using professional cameras, are the cameramen forced to stand so far away from their subjects to achieve shallow focus?