
ISO Settings in Digital Photography by Darren RowseWhat is ISO?In traditional (film) photography ISO (or ASA) was the indication of how sensitive a film was to light. It was measured in numbers (you’ve probably seen them on films - 100, 200, 400, 800 etc). The lower the number the lower the sensitivity of the film and the finer the grain in the shots you’re taking.In Digital Photography ISO measures the sensitivity of the image sensor. The same principles apply as in film photography - the lower...