Optical: systems and elements – Lens – With variable magnification
Patent
1999-06-14
2000-10-31
Mack, Ricky
Optical: systems and elements
Lens
With variable magnification
359697, G02B 1514
Patent
active
061411582
ABSTRACT:
A zoom lens in which a lens group is driven in response to an operation member provided on a body to which the zoom lens is attached, includes a rotary manual ring disposed on a lens barrel, and a driving part arranged to drive the lens group in accordance with a rotating state of the manual ring.
REFERENCES:
patent: 5223980 (1993-06-01), Hamasaki
patent: 5282090 (1994-01-01), Suzuki et al.
patent: 5648836 (1997-07-01), Sato et al.
patent: 5898526 (1999-04-01), Yoshibe et al.
Canon Kabushiki Kaisha
Mack Ricky
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