A variant of 16mm cine film called Super 16 mm, Super 16, or 16 mm Type
W uses single-sprocket film, and takes advantage of the extra room for an
expanded picture area with a wider aspect ratio of 1.67.
Super 16 cameras are usually 16 mm cameras which have had the film gate and ground glass in the viewfinder modified to accept a wider frame.
Super 16 takes up the space originally reserved for the soundtrack.
the development of digital intermediate workflows, it’s now possible
to "digitally blow up" to 35 mm with virtually no quality loss.*