Museum of Fine Arts--465 Huntington Ave., Boston. Telephone 267-9300. Hours: Wednesday through Sunday 10 a.m.-5 p.m. Tuesday 10 a.m.-9 p.m., closed Monday. Admission $1.75; $1.25 all day Sunday. Members and children under 16 free; senior citizens free Fridays; free to all Tuesday 5-9 p.m. Parking lot fee: $1 all day with a validated parking ticket; members 50 cents. Opening Aug. 9, "MFA Staff Exhibition," Current exhibits: "Alfred Stieglitz: Photographer," "Photographic Viewpoints," "William Morris Hunt: A Memorial Exhibition," "The Well-Dressed 18th Century Man," "Ceramic Treasures from Boston's Collections Past and Present," "The Sublime and the Beautiful: Images of Women in American Sculpture," "A Tour of the British Isles" and through Aug. 12, "The 18th Century in France: Paintings and Furniture." Film special: Aug. 7 at 7 p.m., "A Nous la Liberte," musical satire on mechanization. Nonmembers $2; members $1.50; no museum admission charge.