This International Standard specifies the method for determining the ISO speed of black-and-white negative camera films used for pictorial still photography.

This International Standard applies to films processed in conventional chemicals and equipment, but also to those processed using special procedures such as those involving activators or heat for development.

This International Standard does not apply to motionpicture, aerial photography, graphic arts, radiographic or micrographic applications, nor to negatives produced in diffusion transfer systems.