US 8,081,392 B2↗2011Assignee: Olympus Imaging CorporationInventors: Atsujiro Ishii, Yoshiaki ShimizuOLYMPUS ZUIKO DIGITAL ED 14-35mm f/2.0 SWD— 18 elements / 17 groups, 14–35 mm f/2.0 marketed; 14.22–34.28 mm patent