Sprocket holes are the small perforations found along both edges of 35mm photographic film. These evenly spaced holes engage with the teeth of the camera’s film transport mechanism, allowing the film to advance precisely frame by frame through the camera during exposure.
Sprocket holes are essential for maintaining consistent film movement, ensuring that each frame is properly aligned and exposed. They are also used in some printing and scanning processes to accurately track and position film. While primarily associated with 35mm film, similar perforations are found on other roll films, and the term is often used when discussing traditional analog photography and the mechanics of film cameras.