The last time Jack Cardiff went to Cannes, nobody recognised him; wearing his trademark trilby, he'd tell curious autograph hunters he used to be a stand-in for Frank Sinatra. In fact Cardiff's claim to fame was somewhat greater: his was the eye behind some of the most achingly beautiful images in all of cinema. Handsome, charismatic and sharp as a tack, with a bottomless fund of funny and revealing anecdotes, he's also a dream subject for a documentarian. Naturally no television company was prepared to fund a film about him.