7 SETTING THE ASA/ISO FILM SPEED7 Setting the ASA/ISO Film SpeedTurn the setting dial, while pressing the lock release button, until the desired filmspeed aligns with the index. The dial cannot be turned lower than ASA6 or higherthan ASA6400. The table on the next page shows the ASA/ISO film speeds whichcan be set on the New Canon F-1. Figures in parentheses are intermediate speedswhich are indicated by dots on the ASA/ISO dial.ASA/ISOis a numerical rating of the film’s sensitivity to light. The higher the num-ber, the faster the film and the more sensitive it is to a given amount of light ascompared to a film with a lower number. The film manufacturer’s ASA/ISO ratingcan be found on the film cartridge, the carton, and the data sheet.15
