Zoom lens and image pickup apparatus including the same

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United States of America Patent

PATENT NO 9001256
APP PUB NO 20140049681A1
SERIAL NO

13966405

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A zoom lens in which aberration variations at telephoto end during focusing are suppressed while suppressing breathing at wide angle end, which includes, from object side: a positive first unit which does not move for zooming; a negative second unit which moves during zooming; at least one zooming unit which moves during zooming; a stop; and an imaging unit which does not move for zooming. The first unit includes: a negative first sub unit which does not move for focusing; a positive second sub unit which moves to image side during focusing from infinity to proximity; and a positive third sub unit which moves to object side during focusing from infinity to proximity. Focal lengths of the first, second, first sub, and second sub units, and amounts of movement of the second and third sub units during the focusing from infinity proximity are appropriately set.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shimomura, Kazuya Utsunomiya, JP 35 348

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