Seen it today at home, laser projected in 4K HDR. Photography is the closest that Hoyte Van Hoytema has come to Wally Pfister yet in a Nolan movie (which is a good thing for me, as I wasn't impressed at all by "Interstellar" nor "Dunkirk"). Really good, very solid blacks and great clarity, with some great use of an enhanced naturalism in lighting and mixing different colour sources. I assume 5-perf was used for dialog scenes and IMAX mostly for action and non-dialog scenes, as it was in "Dunkirk". I haven't read any articles on it yet.
The film itself is quite entertaining, with its first rate moviemaking making me forgiving its confusing narrative. May have to rewatch it in a couple of years to undestand it all!