Complex sentence: He became interested in photography and in 1931 obtained a Leica, later that year getting a contract to work as a photographer for Ullstein, which in 1933 sent him to Manchuria to cover the Mukden Incident.
Split into simpler sentences: He became interested in photography and in 1931 obtained a Leica. Later in 1931 he got a contract to work as a photographer for Ullstein, which in 1933 sent him to Manchuria to cover the Mukden Incident.