Hardly an introduction to a body of work that spans nearly half a century, “Introducing Suzy Lake,” a retrospective that honored the Detroit-born, Toronto-based photographer, emphasized the two driving forces that jointly determined the course this artist’s rich oeuvre would take: Lake’s steadfast engagement with photography and her provocative work with her own body. In Lake’s hands, the photographic medium is imbued with a strong material presence. Her 1970s works such as Suzy Lake as Gary William Smith, 1973–74, and ImPositions #1 and ImPositions #2, both 1977, demonstrate innovative