I’ve seen lots of external cameras and their footage used on the Parrot AR.Drone. I’m most impressed by these two and leaning toward the GoPro HD Hero Naked versus the ConturHD. It is cheaper, lighter and can also take stills. There is some debate about quality. OTOH, I do not like the way the way it is perched on top of the drone. But, at least I see how it is mounted. I have not with any of the others.