Translations:Adventist Youth Honors Answer Book/Arts and Crafts/Photography/12/en
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2. What is meant by the "speed" of the film? What does ASA/ISO mean?
Film speed is the measure of a photographic film's sensitivity to light. Stock with lower sensitivity (lower ISO speed rating) requires a longer exposure and is thus called a slow film, while stock with higher sensitivity (higher ISO speed rating) can shoot the same scene with a shorter exposure and is called a fast film.
