"Walker Evans (November 3, 1903 – April 10, 1975) was an American photographer best known for his work for the Farm Security Administration documenting the effects of the Great Depression. Much of Evans' work from the FSA period uses the large-format, 8x10-inch camera. He said that his goal as a photographer was to make pictures that are "literate, authoritative, transcendent". Many of his works are in the permanent collections of museums, and have been the subject of retrospectives at such institutions as The Metropolitan Museum of Art."
From Wikipedia with thanks.