Manual control apparatus of zoom lens barrel for an auto focus c

Details Manual control apparatus of zoom lens barrel for an auto focus c Manual control apparatus of zoom lens barrel for an auto focus c

1988-03-22

1989-12-26

Perkey, W. B.

35419512, 350429, 350255, G03B 300, G03B 500, G02B 1500, G02B 702

Patent

active

048901326

ABSTRACT:
A manual control apparatus is provided on the zoom lens barrel for an auto focus type camera to allow manual focusing and zooming control. A zoom lens group and a focusing lens group are provided inside the lens barrel in such a manner that each of the lens groups can be independently moved back and forth along the optical axis thereof, and further a zooming mechanism and a focusing mechanism are respectively provided to move the zoom lens group and the focusing lens group back and forth along the optical axis. By changing over the manual control apparatus, the zoom lens group and the focusing lens group can be selectively moved back and forth one group at a time.

REFERENCES:
patent: B315828 (1975-01-01), Uesugi
patent: 3915557 (1975-10-01), Shinojima
patent: 4089590 (1978-05-01), Sakata
patent: 4322150 (1982-03-01), Kamata et al.
patent: 4457591 (1984-07-01), Muryoi et al.
patent: 4488787 (1984-12-01), Osawa
patent: 4671622 (1987-06-01), Rossman
patent: 4720182 (1988-01-01), Imanari

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