In a recent interview with Indie Wire, Zack Snyder’s Justice League cinematographer Fabian Wagner spoke on the movie’s utilization of slow-motion and how Snyder uses it in his storytelling.
The many slow-motion sequences are something that Snyder’s team knows the filmmaker enjoys, and Fabian confirmed that he and the team “have to be prepared for that” while chuckling about the experience:
“The one thing we know about Zack is that he loves slow motion, so you have to be prepared for that. There’s a technical aspect — if you crank up the camera, you need a lot more light, so you have to be prepared for that. I was ready on most sets, I was always prepared to kick the light up a couple f-stops.”
Wagner also confirmed that the slow-motion work all happens “in camera” and that the crew knows what to expect in terms of what will be slowed down in the final cut:
“No, in camera. For example, the stuff with Ray [Fisher] playing American football – I don’t remember now how fast [frames per second] we went – but we knew going in on that day.”