
The repeated movement out of and into focus of a film in a camera/projector, or out of and into contact of two films in a printer, resulting in variations in the sharpness of the images. Simply, a film appears to go in and out of focus at a regular pace, as if breathing.
British Standard Glossary of Terms used in the Motion Picture Industry
The National Film and Sound Archive of Australia acknowledges Australia’s Aboriginal and Torres Strait Islander peoples as the Traditional Custodians of the land on which we work and live and gives respect to their Elders both past and present.