ISO 517:2008
Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements
- Standard No.
- ISO 517:2008
- Release Date
- 2008
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 517:2008
- Scope
- 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.
ISO 517:2008 history
- 2008 ISO 517:2008 Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements
- 2006 ISO 517:1996/Cor 1:2006 Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements; Technical Corrigendum 1
- 1996 ISO 517:1996 Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements
- 1973 ISO 517:1973 Photography; Still cameras; Lens aperture markings
