ISO 517:1996

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Photography -- Apertures and related properties pertaining to photographic lenses -- Designations and measurements

Pertains to apertures and related properties of photographic lenses affecting the illuminance at the centre of the image. Does apply only to lenses focused on objects at infinity; that is, at least 50 times the focal length of the lens.

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Photography -- Apertures and related properties pertaining to photographic lenses -- Designations and measurements

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Historical

ISO 517:1996

Photography -- Apertures and related properties pertaining to photographic lenses -- Designations and measurements

Are the documents at the ANSI Webstore in electronic Adobe Acrobat PDF format only?

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