Leica M9, 90mm F/2.8, f/3.4, 1/500, iso 160
This wasn't taken from an ulltralight plane, but it feels like it was, to me. I have a couple of books by photographer pilots that fly ultralights and do photography fairly close to the ground.
I can't imagine a better place than here for that kind of work. Don't worry, it's on my (long) list!