The first image that greets visitors in this small but powerful exhibition is Armet Francis’s 1964 work, ‘Self-portrait in Mirror’. The young photographer – he was just 19 at the time – stands hunched intently over his camera in a room crowded with the trappings of daily life. Behind him, lounging among the clutter, a young white woman watches him. Francis is both photographer and friend (perhaps lover); talented professional and black teenager in a country still struggling with its racial politics; watcher and watched. It is the perfect opener for an exhibition exploring identity, representation, and how both…