Panasonic LUMIX S 14-28mm F4-5.6 MACRO S-R1428For Descriptive Performance and Beautiful Bokeh: S R1428 is comprised of 14 lens elements in 10 groups with the use of aspherical lenses and 2 ED lenses to suppress chromatic aberration Smooth, Silent Operation: Lens works with your S Series cameras high speed, high precision contrast AF system with the sensor drive at a maximum 240 fps Excels in Video Recording Performance: The lens features a mechanism that suppresses focus breathing, which was a