Zoom lens having high zoom ratio including wide angle range

Details Zoom lens having high zoom ratio including wide angle range Zoom lens having high zoom ratio including wide angle range

1980-05-13

1982-09-07

Corbin, John K.

350428, G02B 1514

Patent

active

043480829

ABSTRACT:
A compact zoom lens having a high zoom ratio including a wide angle range is composed of a first positive lens group, a second negative lens group and a positive third lens group arranged in that order from the object side of the lens. The first and third lens groups are integrally movable toward the object from the wide angle end to the telephoto end of the lens system. The second lens group is movable independently of the first and third lens groups.

REFERENCES:
patent: 3549242 (1970-12-01), Higuchi et al.
patent: 4062621 (1977-12-01), Fleischman
patent: 4240700 (1980-12-01), Ogawa
patent: 4298251 (1981-11-01), Hartmann

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