Hal Mohr, A.S.C. was a famed movie cinematographer. He is one of only six cinematographers to have a "Star" on the famous Hollywood Walk of Fame, the others being J. Peverell Marley, Ray Rennahan, Leon Shamroy, Haskell Wexler, and Conrad L. Hall. His wife Evelyn Venable also has a "Star".
In 1915, in an early example of an exploitation film peddled directly to theater owners, Mohr and Sol Lesser produced and directed a film The Last Night of the Barbary Coast. This film purported to show the last night of the depraved Barbary Coast red-light district of San Francisco before it was shut down by the police. This is now considered a lost film.
He was nominated for an Academy Award for Best Cinematographer for his work on The Fourposter, a film based on a play of the same name, written by Jan de Hartog. He was also nominated for a Golden Globe for Best Cinematography in a Black and White Film, for his work on the same movie.
Notably, he is the only person to have won a competitive Academy Award without being nominated for it. In 1936, a write-in campaign won him the Best Cinematography Oscar for his work on A Midsummer Night's Dream. The Academy later changed the Oscar rules, making write-in voting impossible.