JP 2016-161889 A↗2016Assignee: Canon Inc.Inventors: Akihiko YukiExample 1CANON 10.2-30.6mm f/2-4.9 (Canon PowerShot G9 X)— 8 ELEMENTS / 6 AIR-SPACED COMPONENTS / 3 ZOOM GROUPS, f = 10.50-29.90 mm (PATENT)