LUMIX S PRO CAMERA LENS50mm fixed focal F1.4 L-mount lens, LEICA certified for LUMIX S Series Full-Frame L Mount mirrorless camerasLENS ELEMENTS 13 lenses in 11 groups; 2 aspherical lenses and 3 ED (Extra-low Dispersion) lenses effectively suppress both axial chromatic aberration and chromatic aberration of magnificationLENS FOCUSING A double focus...