Wednesdays at 3 p.m.Film 50: History of Cinema, a film class presented jointly by the Pacific Film Archive and the UC Berkeley Film Studies Program, continues through May 3. This annual film/lecture course designed for non-Film majors is open to the general public as space permits. Members and other PFA patrons will want to take advantage of this opportunity to explore the history and aesthetics of narrative features with illuminating discussion by Professor Russell Merritt. Screenings and lectures are held in the new PFA Theater, Bancroft @ Bowditch. Advance tickets are available at the PFA box offices, or charge-by-phone (510-642-5249). 2000Schedule for March, April, and May: