How are 70mm films displayed on television or videotape?
There are two ways to do this. The simpler method is to use a 35mm (or, gasp!, 16mm) reduction print, which can be transferred to videotape in a conventional fashion. The more complicated method, though the one which provides better quality, is to transfer a 70mm print at Crest National Film Laboratory, which has modified a Rank ™ machine to accept various formats of 70mm material at various frame rates.
