The lens looks like a prime...even sort of old school chrome looking. I don't think a filter or a hood would help if that one "dropped"...I bet my shotgun could drop it like a bad habit which is exactly what I would do if someone flew it over my air space.
I don't particulary care about spying on any of my neighbors or looking at the farm from above or having some giant unnatural mosquito thing flying around scaring the heck out of the horses. But still that thing is pretty cool...
Now if it could go to the store and get me a six pack that would be something entirely different.