Single operator macro-focusing zoom lens barrel

Details Single operator macro-focusing zoom lens barrel Single operator macro-focusing zoom lens barrel

1982-03-04

1984-07-03

Henry, Jon W.

350255, G02B 710, G02B 1518

Patent

active

044575912

ABSTRACT:
A lens barrel enabling the focusing to infinity distance to a short distance by movement of a focusing lens system and enabling magnification change by movement of a variator lens system includes an operating ring rotatable about the optical axis and slidable in the direction of the optical axis, first means for causing the movement of the focusing lens system to respond to the rotation of the operating ring, the operating ring being further rotatable from the rotation for the focusing to the short distance to enable the focusing to a distance shorter than the short distance, and second means for causing the movement of the variator lens system to respond to the sliding movement of the operating ring, the second means including cam means provided between the operating ring and the variator lens system to enable movement of the variator lens system in response to the rotation of the operating ring for the focusing to the distance shorter than the short distance.

REFERENCES:
patent: 4322150 (1982-03-01), Kamata et al.

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