Camera work

I been reading the copter AP forums and looking at what people are using what it produces.  The Panasonic GH2 seems to be the ticket.  It's not a dslr but CMOS.  

These guys have been in the TV business and shot a nice video. 

They have business in Atlanta doing this.  It was my understanding this was not "leagal" but maybe they know something we don't.....