Carl Louis Gregory was an American cinematographer.
Carl was born in Walnut, Kansas in 1882. He ventured into photography while he was 11 years old. He received degrees in pharmacy and chemistry in 1902 and 1904, respectively. He developed an optical printer in 1920 and as a result, his technical expertise was highly valued.
Gregory was senior cameraman for the first major Thanhouser release (which was St. Elmo). He photographed stills for a couple of advertisements. Gregory was the head instructor at the U. S. Signal School of Cinematography at Columbia University. He also filmed the 1914 serial called The Million Dollar Mystery.
He was later on the staff at the National Archives, 1936-1946. During his tenure there, he modified a process optical printer and was successful in restoring paper prints with simple techniques.
He died on 6 Mar 1951 at his home in Van Nuys, California.