Photographer Gérard Uféras knows about fashion. But what he excels at is bringing the curious eye backstage. A former student of legendary French lensman Willy Ronis, Uféras also likes to spend time with a subject. Favorites include the worlds of opera and ballet, but he has now branched out—into fashion. Uféras’s new book Dior: 30, avenue Montaigne is a huge, magnificent tome. It’s also the perfect Paris valentine to couture. In focusing on that metier’s secrets and skills, he has forged a very special portrait.