Compact zoom lens system with a high zooming ratio

Details Compact zoom lens system with a high zooming ratio Compact zoom lens system with a high zooming ratio

1987-12-18

1988-09-27

Corbin, John K.

350432, G02B 1514, G02B 1318

Patent

active

047737441

ABSTRACT:
A compact zoom lens system with a high zooming ratio comprises a first lens group having a positive refracting power, a second lens group having a positive refracting power and a third lens group having a negative refracting power, and is a three groups-type lens system arranged to be zoomed by respectively varying the spaces on the optical axis among the respective lens groups in which optical performance is favorable through out the zooming range.

REFERENCES:
patent: 4726668 (1988-02-01), Nakayama et al.

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