Walker Evans famously chose as the first image in his “American Photographs” a picture of a New York photo studio. “Photos in 5 min” the signs say, and the painted forefingers of two opposing hands point to the entrance. Evans, one of the great American artists of the 20th century, was tipping his hat to those photographers — not great artists — who cranked out studio portraits to support themselves. One such photographer far from New York was Lazhar Mansouri (1932–85), an Algerian whose “Portraits of a Village: 1950–70” is currently on display at the Westwood Gallery.