A person and a Polaroid. That’s all photographer Anna Bauer needed for Backstage, her new book capturing designers, models, editors and the like in the moments right after a runway show. With drama in full swing this Fall 2012 season, it’s fascinating to see Paul McCartney hug daughter Stella, model Freja looking especially intense and Phoebe Philo, Raf Simons and Marc Jacobs just trying to catch their breath.