Can someone, please, tell me how this very strange optical effect was achieved? I saw it at the video clip 'Air Rings' (at rent-a-cloud.com). It is a strange illuminated ring that changes shape as the sun moves downward. I emailed that site, but their cameraman is overseas. They tell me they don't use any software. I don't think it was done by filters either. But what lens could have produced such effect? Even my old know-all film teacher is puzzled.
Thanks for answers - xelob@fastmail.fm