1. A method of controlling exposure for a camera based on the scene brightness measured by light measuring elements comprising the steps of; dividing a light measuring area in a camera into a plurality of zones, providing at least one light measuring element in each of said zones, obtaining the maximum or minimum brightness (Bzi) in each of said zones, obtaining an average brightness (B.sub.0) from the outputs of all the light measuring elements provided in said light measuring area, obtaining a weighted sum of the brightness based on a formula of ##EQU5## where K.sub.i+2 is a coefficient and n is the number of the zones, computing a scene brightness (B) by use of a formula of ##EQU6## where K.sub.1,K.sub.2,K.sub.i+2 are coefficients, and controlling exposure of the camera based on the scene brightness (B).