Setting the film speed, Setting the fiim speed – Nikon Camera F3AF User Manual

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Setting the Film Speed

To program the F3AF to give the correct exposure with a par

ticular film, you must first set the camera to the correct film

speed. The film speed, represented by an ASA/ISO number, is a

numerical rating of the film’s sensitivity to a given amount of
light: the higher the number, the greater the sensitivity, and vice

versa. This number is printed on the film carton and the cartridge

itself. To handle all film types, the camera’s ASA/ISO dial

has

settings from ASA/ISO 12 to 6400. Two dots between each pair

of ASA/ISO numbers stand for intermediate settings, such as
64, 80, etc. The table above gives the speeds for all intermediate

settings.