Compact high vari-focal ratio zoom lens system

Details Compact high vari-focal ratio zoom lens system Compact high vari-focal ratio zoom lens system

1988-11-10

1989-08-08

Arnold, Bruce Y.

350432, G02B 1514, G02B 1308

Patent

active

048546828

ABSTRACT:
A compact high vari-focal lens system permitting simplifying the lens barrel structure and having favorable performance; comprising a first lens group having positive refractive power, a second lens group having positive refractive power and a third lens group having negative refractive power, and so adapted as to perform zooming by shifting the first lens group integrally with the third lens group and shifting the second lens group.

REFERENCES:
patent: 4701033 (1987-10-01), Masumoto
patent: 4726668 (1988-02-01), Nakayama et al.
patent: 4773744 (1988-09-01), Yamanashi

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