JP 2000-284174 A2000
Assignee: Canon Inc.
Inventors: Akihiro Nishio
Akihiro Nishio
3 related patents across 6 interactive lens diagrams.
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Canon Inc.(3)
US 6,115,188 A2000
Assignee: Canon Inc.
Inventors: Akihiro Nishio, Hideki Ogawa, Makoto Misaka
CANON EF 300mm f/2.8 L IS USM— 15 ACTIVE ELEMENTS / 11 GROUPS, MODELED EFL ≈ 293.600 mmCANON EF 400mm f/2.8 L IS USM— 400mm f/2.8 (marketed), Patent f = 392.15 mm, F/2.9CANON EF 500mm f/4 L IS USM— 15 POWERED ELEMENTS / 11 GROUPS + FILTER, PATENT f = 490.56 mm; ARRAY EFL ≈ 491.36 mmCANON EF 600mm f/4 L IS USM— 15 powered elements / 11 groups + filter, Patent f = 585.20 mm; computed EFL ≈ 585.328 mm
US 7,158,320 B22007
Assignee: Canon Inc.
Inventors: Akihiro Nishio