Dean Semler, A.C.S., A.S.C., (born 1943) is an Australian cinematographer and film director. Over his career, he has worked as a cinematographer, camera operator, director, second unit director, and assistant director. He is a three-time recipient of the AACTA Award for Best Cinematography and an Academy Award winner. He is a member of both the Australian Cinematographers Society (ACS) and the American Society of Cinematographers (ASC). In 2002 he was appointed a Member of the Order of Australia (AM).