This part of ISO 5 specifies the geometric conditions for measuring ISO 5 standard diffuse and ƒ/4,5 and ƒ/1,6 projection transmittance densities.
ISO 5 standard diffuse density is primarily applicable to measurements of photographic images to be viewed on a transparency illuminator, or viewing box, to be contact printed, or to be projected with a system employing diffuse illumination.
