Compact zoom lens

Details Compact zoom lens Compact zoom lens

1980-07-11

1982-05-18

Corbin, John K.

G02B 1516

Patent

active

043301819

ABSTRACT:
A compact zoom lens covering a range from standard to telephoto and having a high zoom ratio of approximately four adapted for use with 35 mm SLR cameras. The zoom lens system includes a first convergent lens group, a divergent lens group and a second convergent lens group in that order from the object. The first convergent lens group includes three lens components including at least one negative lens component, the divergent lens group is composed of at least three lens components including at least one positive lens component while the second convergent lens group includes at least two negative and two positive lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object. The first and second convergent lens groups may be either rigidly coupled to be movable together or movable independently from one another to vary the overall focal length of the zoom lens system.

REFERENCES:
patent: 4094586 (1978-06-01), Sato et al.

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