Kyosuke Murakami — Lens Patent Author | Surface & Stop

Kyosuke Murakami2 related patents across 2 interactive lens diagrams.
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Sigma Corporation (2)
Sigma Corporation(2)JP 2024-035865 A↗2024Assignee: Sigma Corporation
Inventors: Kyosuke Murakami
Numerical Example 1SIGMA 23mm f/1.4 DC DN | Contemporary— 13 elements / 10 groups, f = 22.31 mm design; 23 mm marketed
JP 2025-186709 A↗2025Assignee: Sigma Corporation
Inventors: Kyosuke Murakami
Numerical Example 1SIGMA 12mm f/1.4 DC | Contemporary— 14 ELEMENTS / 12 GROUPS, f ≈ 12.3301 mm