Camera Wholesalers — asa

ISO? Isn't That for Film (What's That #2)

Almost every week in our digital camera mini-classes,  I get to a part of the class where everyone universally has a quizzical look on their faces, as if to say, "why did they do that?" And that's when I get to the portion of the use of ISO speeds on digital cameras. The letters ISO (or ASA for old-timers) on your digital camera settings refer to the equivalent of film speed on a older film based camera. ISO settings  determines how sensitive the image sensor is to light, so the camera manufacturers have transferred the principle to digital cameras (At this point, our students take a collective sigh...

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