Film Perforations - Placement

Placement

All of the systems described above place the perforations down either one side (Standard and Super 8, Super 16) or both sides (35 mm and 65/70 mm). Standard 16 mm can be either single or double perf; some older cameras require double perf, but most can handle either. Because most cameras can handle both, and because of the increased popularity of Super 16 film, most 16 mm stock manufactured today is single perf unless requested otherwise.

Some obsolete formats such as 9.5 mm film and some variants of 17.5 mm film used a single perforation in the middle of the frame line between each image. This is however considered a liability, since any sprocket or claw error will likely damage the center of the frame itself rather than the outer edges.