If you’ve seen the Keanu Reeves-produced documentary Side by Side (and if not you should, it’s on Netflix Instant), you’d know that many filmmakers are on board for the digital switch, such as David Fincher, David Lynch, and Robert Rodriguez, among others. But, you’d also know that Christopher Nolan and his longtime cinematographer Wally Pfister (who’s making his directorial debut in April with Transcendence) are the most outspoken voices for 35mm film.