Rudolf Koppitz (4 January 1884 – 8 July 1936) was an Austrian photographer. He moved to Vienna and was a Photo-Secessionist whose work includes straight photography and modernist images. He was one of the leading representatives of art photography in Vienna between the world wars. Koppitz is best known for his works of the human figure including his iconic Bewegungsstudie, "Motion Study" and his use of the nude in natural settings. Source: Wikipedia (en)