UFO sightings are always “according to a source”, there are never any pictures except grainy images from a radar screen. Despite everyone having a 10 megapixel video camera in their pocket at all times, no one ever gets a clear shot of the supposed UFO. 5 lights in the sky at night? UFO. Green dot on a radar screen? UFO. If there are aliens they are awfully shy.
There is a lot more to clear photography than resolution.