Reference number
ISO 517:2008
© ISO 2025
International Standard
ISO 517:2008
Photography — Apertures and related properties pertaining to photographic lenses — Designations and measurements
Edition 3
2008-03
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Published (Edition 3, 2008)
This publication was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 517:2008

Language
Format
CHF 65
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Abstract

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.

General information

  • Status
     : Published
    Publication date
     : 2008-03
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 3
    Number of pages
     : 8
  • Technical Committee :
    ISO/TC 172/SC 1
    ICS :
    37.040.10 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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