JP H01-102413 A1989
Assignee: Canon Inc.
Inventors: Hideki Ogawa, Sadatoshi Takahashi
Hideki Ogawa
7 related patents across 10 interactive lens diagrams.
Group by
Canon Inc.(7)
JP 1991-1413131991
Assignee: Canon Inc.
Inventors: Hideki Ogawa
JP H05-034592 A1993
Assignee: Canon Inc.
Inventors: Hideki Ogawa
JP 1997-211319 A1997
Assignee: Canon Inc.
Inventors: Hideki Ogawa
US 5,899,5851999
Assignee: Canon Inc.
Inventors: Hideki Ogawa
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 MODELED ELEMENTS / 11 GROUPS, PATENT f = 490.56 mm; ARRAY EFL ≈ 491.36 mmCANON EF 600mm f/4 L IS USM— 15 modeled elements / 11 groups, Patent f = 585.20 mm; computed EFL ≈ 585.328 mm
US 2002/0015231 A12002
Assignee: Canon Inc.
Inventors: Hideki Ogawa