JP 2025-063175 A↗2025Assignee: Sony Group CorporationInventors: Riki MaruyamaExample 2SONY FE 400mm f/2.8 GM OSS— 22 ELEMENTS / 16 GROUPS, DESIGN f ≈ 388.15 mmExample 4SONY FE 600mm f/4 GM OSS— 23 ELEMENTS / 17 GROUPS, DESIGN f = 581.97 mm