A focal length that is perfect for portraiture & a range of other subjects, a bright F1.8 maximum aperture, Optical Steady Shot (OSS) image stabilization & impressive image quality. Put it all together in a lens that is surprisingly compact & lightweight & you have a winning combination: the SEL50F18. The large maximum aperture & Optical Steady Shot are worthy features in their own right, but working together they make it possible to shoot crisp, clear images under low-light conditions that would be beyond the capabilities of a conventional lens. The F1.8 maximum aperture & a circular aperture design also join forces to create gorgeous defocusing effects. Add responsive, quiet autofocus & aperture operation, & you have a lens that is ideally suited to shooting movies as well as stills.