Double-perf 16 mm film, the original format, has a perforation at both sides of every frame line. Single-perf is perforated at one side only, making room for an optical or magnetic soundtrack along the other side. Super 16 mm The variant called Super 16 mm, Super 16, or 16 mm Type W is an adaptation of the 1.66 aspect ratio of the "Paramount format" to 16 mm film. It was developed by Swedish cinematographer Rune Ericson in 1969, using single-sprocket film and taking advantage of the extra room for an expanded picture area of . Super 16 cameras are usually 16 mm cameras that have had the film gate and ground glass in the viewfinder modified for the wider frame, and, since this process widens the frame by affecting only one side of the film, the various cameras' front mounting plate or turret areas must also be re-machined to shift and re-center the mounts for any lenses used. Because the resulting, new, Super 16 aspect ratio takes up the space originally reserved for the 16mm soundtrack, films shot in this format must be enlarged by optical printing to 35 mm for sound-projection, and, in order to preserve the proper 1.66:1, or (slightly cropped) 1.85:1 theatrical aspect ratios which this format was designed to provide. And, with the recent development of digital intermediate workflows, it is now possible to digitally enlarge to a 35 mm sound print with virtually no quality loss (given a high quality digital scan), or alternatively to use high-quality video equipment for the original image capture. In 2009, German lens manufacturer Vantage introduced a series of anamorphic lenses under its HAWK brand. These provided a 1.30x squeeze factor (as opposed to the standard 2×) specifically for the Super 16 format, allowing nearly all of the Super 16 frame to be used for 2.39:1 widescreen photography. Ultra 16 mm The DIY-crafted Ultra 16 is a variation of Super 16. Cinematographer Frank G. DeMarco is credited with inventing Ultra 16 in 1996 while shooting tests for Darren Aronofsky's Pi. Ultra 16 is created by widening the left and right sides of the gate of a standard 16 mm camera by 0.7 mm to expose part of the horizontal area between the perforations. Perforation placement on standard 16 mm film at the divisions between frames accommodates use of these normally unexposed areas. The Ultra 16 format, with frame dimensions of