Markoe also revealed that the camera displays will also show frame lines for the native 1.43:1 IMAX film format and also IMAX ...
As we mentioned in our film gauge piece, Nolan loves shooting on film and utilizes 65mm intentionally to provoke a tone of massive scale. In that regard, Interstellar was made for 70mm IMAX.
They also announced that Interstellar would be shown in 70mm IMAX prints, as well as on digital screens. Nolan filmed Interstellar with a combination of 35mm anamorphic film and 65mm IMAX.