The sony e50mm f18 oss lens is a bright fast medium prime lens well suited for portraits and general photography the f18 maximum aperture brings the subject in sharp focus whilst creating a soft smooth blur effect for the background combined with high quality optics wide aperture and optical steadyshot the e50mm f18 is the perfect lens for handheld shots in low light conditions ensuring crisp images with minimised distortion and chromatic aberration this lens is designed for sonys a