Barbara Jean Hammer (May 15, 1939 – March 16, 2019) was an American feminist film director, producer, writer, and cinematographer. She is known for being one of the pioneers of the lesbian film genre, and her career spanned over 50 years. Hammer is known for having created experimental films dealing with women's issues such as gender roles, lesbian relationships, coping with aging, and family life. She resided in New York City and Kerhonkson, New York, and taught each summer at the European Graduate School.

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