Read the meter

EXPOSURE METERING is a vital part of photography. There are four different options. Evaluative metering biases the exposure to the active focus point (or points) that achieve autofocus. It works well even in tricky situations, like backlit portraits. Centre-weighted metering concentrates mainly on the central region of the frame, but averages in brightness levels around the periphery. Partial metering is based solely on the central region of the frame, while Spot metering works in the same way but only uses a relatively tiny point at the frame’s centre.