INTERSTELLAR was shot using a combination of 35mm anamorphic film and 65mm 15 perf IMAX FILM. When presented on 70mm IMAX, the sequences shot on IMAX are printed full quality in their native format- the highest quality imaging format ever devised, offering almost ten times the resolution of standard formats, and filling the giant IMAX screens from top to bottom. The 35mm anamorphic sequences have been blown up to fill the IMAX screen side-to-side using a 6k digital DMR process, the highest resolution processing ever used in a feature film presentation. The finished picture switches between the 2.40:1 and 1.43:1 aspect ratios at key dramatic moments in the film. This is combined with a specially made IMAX uncompressed sound mix for the most immersive presentation of the film.
The digital IMAX presentation has been created from 6 and 8k scans of the original film elements, graded specifically for the high contrast IMAX dual-projection system. When presented on digital IMAX, the sequences shot on IMAX will fill the IMAX screens from top to bottom and switch from 2.40:1 to an aspect ratio of up to 1.9:1. It will also carry the uncompressed IMAX sound mix of the film.
When presented on regular 70mm film, the IMAX sequences have been optically reduced to 70mm 5 perf film to produce a grain-free, ultra-high resolution image, cropped top and bottom to fill the wide screen. The 35mm anamorphic sections have been blown up optically. Both processes are photochemical, preserving the original analog color of the imagery and combined in a 2.2:1 widescreen presentation. The sound is carried on a separate DTS disc to produce state-of-the-art 6-track digital sound.
The 35mm anamorphic prints have been made photochemically, preserving all the rich analog color and high resolution of the original 35mm anamorphic photography. This is combined with new 4k negatives produced from 8k scans of the IMAX original negatives, cropped top and bottom to create a seamless 2.40:1 scope image. The sound is coded on the prints in Dolby SRD for a 6-track digital playback experience in most theatres.
The digital presentation of INTERSTELLAR has been created from 4 and 8k scans of the photochemically- color graded film elements, fine-tuned in the digital realm to maximize the color and contrast attributes of digital projectors, and dust-busted to achieve the cleanest and most stable image presentation possible. The film was mastered in 4k for the highest digital resolution currently available.
The sound on INTERSTELLAR has been specially mixed to maximize the power of the low end frequencies in the main channels as well as in the sub woofer channel. This effect is present is in all available presentations of INTERSTELLAR, all of which have been designed to play back at the volume level designated by the industry at 7 on the Dolby cinema processor.