The documentaries around this time frequently employed technicians who went on to make successful career in motion picture dramas. Sadly there's no credit on this film for Sound, but one of the cameramen was the late David Watkin who I got to know quite well during my working years. He was known to his friends and in fact called himself "Wendy". He was English and lived in Brighton. I first met him on the set of White Nights. He was a most creative, kind chap and had a couch in his caravan where he'd sleep between takes - he said there was nothing else worth doing while scenes were set up. Picking a few of his more famous films I include Catch-22, Chariots of Fire, Out of Africa and Memphis Belle although there are many, many more.
Brian