Shizuka Takemoto — Lens Patent Author | Surface & Stop

Shizuka Takemoto1 related patent across 2 interactive lens diagrams.
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Sigma Corporation (1)
Sigma Corporation(1)JP 2001-330771 A↗2001Assignee: Sigma Corporation
Inventors: Shizuka Takemoto, Norikazu Yokoi
SIGMA 24mm f/1.8 EX DG ASPHERICAL MACRO— 10 ELEMENTS / 9 GROUPS, DESIGN f = 24.69 mmSIGMA 28mm f/1.8 EX DG ASPHERICAL MACRO— 10 ELEMENTS / 9 GROUPS, DESIGN f = 27.10 mm