Abstract 

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.


General information

  • Status :  Withdrawn
    Publication date : 1996-12
  • Edition : 2
    Number of pages : 8
  • :
    ISO/TC 172/SC 1
    Fundamental standards
  • 37.040.10
    Photographic equipment. Projectors

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