Zoom lens with macromechanism

Details Zoom lens with macromechanism Zoom lens with macromechanism

1984-09-18

1987-02-24

Corbin, John K.

G02B 710

Patent

active

046453105

ABSTRACT:
A zoom lens in which a stop guide is located between an operating ring and a stationary lens barrel for regulating the range of rotation of the operating ring. A macrophotography guide permits, when the operating ring is positioned at the closest photographing distance and in the focusing rotation range and at at least one of the zooming movement ends, the operating ring to further turn for a closer photographing range. The stop guide includes a stop pin fixed to the operating ring and a stop plate having stop pin rotation range regulating surfaces on both sides in the circumferential direction of the zoom lens and which is secured to the stationary lens barrel. The plate has a macrophotography guide cut formed in at least one end portion located in the direction of the optical axis with the macrophotography guide cut being arranged circumferentially of the zoom lens.

REFERENCES:
patent: 4421389 (1983-12-01), Muryoi
patent: 4457591 (1984-07-01), Muryoi et al.

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