I am ating my review after a couple of years. In terms of optical qualities, the lens is mediocre. Soapy, sluggish and boring. Offers an ugly blur. The positive aspects include light weight, compactness and high quality of the body material. Different pros: Weight, colors, workmanship, stroke of the FR change ring, optical stabilization, autofocus, small diameter. Some cons: Low sharpness (catastrophic near the edges). There is no bayonet protector.