Galen Rowell, Richard Avedon, Irving Penn, Steve McCurry, Helmut Newton, Henri Cartier- Bresson, Allan Arbus
I believe it is b the traditions, cause its based on experience
Iconography, the science of identification, description, classification, and interpretation of symbols, themes, and subject matter in the visual arts. The term can also refer to the artist's use of this imagery in a particular work.