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Iris
Adjustable diaphragm controlling amount of light transmitted by a lens (1985).
The diaphragm in the lens which controls the intensity of light reaching the film emulsion, tube or CCD.
References
Case, D., 1985, Motion Picture Film Processing, Media Manuals, Focal Press, London, Boston
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.