Man Ray Legendary Photography, painter, and maker of objects and films, Man Ray was on the most versatile and inventive artists of 20th century.  Man Ray Trust - Official site
Richard Avedon One of the premier American Portrait, Fashion and Art photographers. Richard Avedon is regagded as one of the most influential photographers of the 20th Century.  Richard Avedon Official Site  Richard Avedon - Fraenkel Gallery
Robert Mapplethorpe Nude and Portrait photographer most known for his controversial work.  Robert Mapplethorpe Foundation