Refers to the difference between light and shadow, or between maximum and minimum amounts of light, in a particular film image; can be either high contrast (with a sharp delineation between the bright and dark areas) or its opposite low contrast; color can also be contrasted; see also chiaroscuro.
How important it is to take your camera tests out of the studio and on to location. You want to see how your camera’s emulsion handles highlights, hot skies, night exteriors and night interiors.