Mission: Impossible — Fallout director Chris McQuarrie tweeted yesterday that during the big IMAX sequences (“the HALO and the heli”) the film’s aspect ratio changes from 2.39 (standard widescreen) to 1.90 (nearly standard Academy ratio of 1.85). That’s not what we like to see when a film shifts into IMAX mode. For that we require super-tall boxy aspect ratios, or at the very least a 1.43 a.r., which is what Chris Nolan‘s Dunkirk shifted into from time to time. The IMAX “wow” factor needs that.

Most viewers (critics included) don’t even notice aspect ratios. Me to critic friend : “Is the film you saw in 1.85 or widescreen scope?” Critic friend: “Uhm, I’m not sure.”