Q. What's the difference between Super 8mm and Regular 8mm film?
A. Regular 8mm film is 16mm wide and perforated with large holes on each side of the film. There are twice as many holes in 8mm film as there are in standard 16mm movie film. The trick is that only half of the film is exposed in filming; the film is then turned over after the first 25 feet and the other half is exposed, for a total of 50 feet. The film is then slit after processing.
Standard 16mm film will not work in 8mm cameras due to the lack of the extra perforations. But Regular 8mm film will work in 16mm cameras in case you were wondering…
Super 8mm film refers to a standard 8mm wide strip of film that only has sprocket perforations on one side. The holes are SMALLER than those for Regular 8mm. Correspondingly, the actual film area for Super 8mm film is larger than that for Regular 8mm - a full 50 percent larger! Hence the industry term of "Super" is added to the name.
There is also Super 16mm where the film is still 16mm wide but one side of the sprocket perforations are removed and the film exposure area is enlarged to take advantage of the extra space. Other "Super" formats are also possible. The main concern when "Super" sizing a film format is film registration. Without the dual support offered by two sprockets, larger film formats tend to wobble more than the smallest "Super" film - Super 8mm.
Finally, many Regular 8mm cameras offer the standard speed of 16 frames per second while Super 8mm cameras have a standard film speed of 18fps.