35mm & 16mm The most common sizes of film stock used to shoot, print, and present movies. 35mm is preferred for commercial film and TV shoots, with multiple stocks for select shooting conditions. 16mm is more often used for lower-budget projects, commercial and industrial shoots, and previously as a “home movie” format.

4-Track Mag A now-dormant process which allowed for multi-channel sound reproduction in theatres using magnetic striping attached to the film print. Often vulnerable to erasure and damage due to demagnetizing and detachment through aging, requiring strict storage and handling conditions. Supplanted by Dolby Stereo, an optical process requiring less delicacy and upkeep.