Of course, Christopher Nolan uses a modified medium-format SLR to preview shots on set! And now an Instagram post from sunny16lab (embedded below) has highlighted the legendary filmmaker’s penchant for a modified Pentax 67. These cameras were designed to take 120 and 220 film, but Nolan’s Pentax 67 is gutted, essentially making it an extremely cool optical viewfinder for previewing shots on set. This enables both Nolan and long-time collaborator, cinematographer Hoyte van Hoytema, to preview shots using the correct field of view. You might also like...How Christopher Nolan made a 300-pound IMAX camera disappear when making The Odyssey.