Erwin C. Dietrich

Erwin C. Dietrich was a Swiss film director, producer and actor, often regarded as one of the most influential cinematographers in Switzerland. Erwin C. Dietrich wrote numerous screenplays under the pseudonym Manfred Gregor (not to be confused with the author Gregor Dorfmeister, who used the same pseudonym) and often directed under the pseudonyms Irvin C. Dietrich, Wolfgang Frank, Manfred Gregor, Michael Thomas and Fred Williams.