JP 2024-167569 A↗2024Assignee: Cosina Co., Ltd.Inventors: Tatsuya MoriyamaVOIGTLÄNDER ULTRON 27mm f/2— 6 ELEMENTS / 4 GROUPS, PATENT f = 27.8000 mm
JP 2026-120386 A↗2026Assignee: Cosina Co., Ltd.Inventors: Tatsuya MoriyamaVOIGTLÄNDER PORTRAIT HELIAR 75mm f/1.8— 6 ELEMENTS / 3 GROUPS, 75 mm marketing · 73.356 mm sharp-state EFL