ISO-517 › Historical Revision Information
Photography - Apertures & Related Properties Pertaining To Photographic Lenses - Designati

ISO-517 - 1ST EDITION - SUPERSEDED
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ISO 517:2008 pertains to apertures and related properties of photographic lenses affecting the illuminance at the centre of the image.

ISO 517:2008 specifies aperture markings for all types of lenses used in still cameras, and gives tolerances for the stop numbers. It also defines aperture stop, entrance pupil, focal length, relative aperture and stop numbers, and gives methods for their measurement or determination.

ISO 517:2008 applies only to lenses focused on objects at infinity; that is, at least 50 times the focal length of the lens.

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37.040.10 (Photographic equipment. Projectors)

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Document Number

ISO 517:1973

Revision Level

1ST EDITION

Status

Superseded

Publication Date

Sept. 1, 1973

Committee Number

ISO/TC 172/SC 1