I'm didn't know it exist in real life. I was just messing around, looking how I could make a bullet shooting.... thing.... using gravity. But thanks for you feedback
This is not how normal cameras works. This concept is only used in gigantic $20.000 broadcasting cameras used for the fifa worldcup and that sorts of stuff ( http://youtu.be/BaVp9ejf_uA?t=1m5s )