A medium telephoto macro lens with 1x (life-size) magnification. With an optimized optical design to reduce spherical fluctuation to a minimum during close-up photography, it delivers constant high image quality with great sharpness over all focusing distances. The inner focusing system allows for a much longer working distance. High-speed and silent autofocusing is realized with the Ultrasonic Motor (USM). Its 8-blade circular aperture creating beautiful background blur makes it a popular portrait lens as well.