Outstanding image quality in a lightweight and extremely compact form: the M.Zuiko Digital 17mm (34mm*) lens brings along a large, ultra-bright F1.8 aperture for tripod-free shooting in low-light conditions as well as the unique Fast Focus Clutch mechanism.With this lens's advanced Movie & Stills Compatible (MSC) autofocusing and special ZERO coating, you can capture the high-quality results you crave.