A full-frame 50mm prime that's sharp wide open with smooth, natural fall-off. At F1.4 it handles low light well, and the 11 blade aperture gives soft, rounded backgrounds. Two linear motors keep autofocus fast and quiet, and the de-clickable aperture ring allows smooth exposure changes mid-shot. At 516g with a 67mm filter thread, it shares filters with the 24mm GM and suits interviews, portraits, product, drama and documentary.