An essay is presented on photography. It clearly indicates that there was lag in methodology between photography studies and the study of other modern arts. The author mentions about the views of artist-writers László Moholy-Nagy and Franz Roh and art historians like Heinrich Schwarz about photographs and he mentions about the Yve-Alain Bois's 1990 collection of essays "Painting as Model," and mentions about the photograph of Paul Citroen.