In the sound film era of the 30s he was able to work in Germany till 1938 and he led the camera for the productions "Das Testament des Dr. Mabuse" (1933), Leni Riefenstahl's "Triumph des Willens" (1935), "Der Dschungel ruft" (1936) and again for Leni Riefenstahl's "Olympia" (1938).