I shoot birds in flight as a hobby. It takes some skill, but it's not _that_ hard. And a bird taking up 1/4 of your FOV is close enough that you have to focus

I shoot birds in flight as a hobby. It takes some skill, but it's not _that_ hard. And a bird taking up 1/4 of your FOV is close enough that you have to focus on it. A plane/UFO taking up 1/4 of your FOV is much further away, and you can just pre-set your focus at 'infinity'. >1% of UFO photos should definitely be taken with good equipment by someone who knows how to use it.