My need is special. I need a HD digital camera that can shoot with autofocus, tele-zoom (optical 18X) and zoom audio all at the same time. I film drag racing and everything is over in less than 15 seconds. Is there a HD digital camera under 600 pounds that can do this? I have been looking at Nikon Coolpix P500 but can't find a thorough review for its video mode.
I tried a couple of digital SLR with intercgangeable lens (Canon, Nikon) but none could manage autofocus during tele-zoom and in some cases the zoom motor was heard on the recording. Your suggestions would be greatly appreciated.