Optical: systems and elements – Lens – With variable magnification
Patent
1997-01-15
1998-05-05
Epps, Georgia V.
Optical: systems and elements
Lens
With variable magnification
359701, G02B 1514
Patent
active
057483868
ABSTRACT:
A zoom lens barrel in which a zoom lens is switched to a plurality of focal lengths by a moving member by which a plurality of lens groups are moved in the direction of optical axis. After a desired focal length has been selected, a focusing operation is conducted by the moving member. At least two lens groups, which are moved for switching focal lengths, are moved while a distance between lens groups is being changed so that the focusing operation can be conducted.
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Honda Yuichi
Imaizumi Toshio
Nakayama Haruki
Epps Georgia V.
Konica Corporation
Mack Ricky
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