Zoom lens system for use with a compact camera having a wide cov

Details Zoom lens system for use with a compact camera having a wide cov Zoom lens system for use with a compact camera having a wide cov

1990-11-21

1992-11-17

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359684, 359708, G02B 1514, G02B 1318

Patent

active

051648598

ABSTRACT:
In a zoom lens system for use with a compact camera having a wide coverage of angles that comprises, in order from the object side, a first lens group having a positive focal length and which performs zooming by changing the distance beween the first and second lens groups, the said first lens group comprises, in order from the object side, a front subgroup 1F having a positive focal length, a diaphragm stop and a positive rear subgroup 1R with a small power, and the first lens in the front subgroup 1F is a negative lens, with the specific conditions.

REFERENCES:
patent: 3918798 (1975-11-01), Takano
patent: 4190323 (1980-02-01), Ogawa et al.
patent: 4682860 (1987-07-01), Tanaka et al.
patent: 4836660 (1989-06-01), Ito

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