Projekta Nr.ISO 517:1996
Nosaukums<p>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.</p>
Reģistrācijas numurs (WIID)4579
Darbības sfēra<p>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.</p>
StatussAtcelts
ICS grupa37.040.10