Zoom lens system with high zooming ratio

Details Zoom lens system with high zooming ratio Zoom lens system with high zooming ratio

1977-04-19

1978-09-12

Clark, Conrad J.

G02B 1518

Patent

active

041133560

ABSTRACT:
A compact zoom lens system with high zooming ratio for which the range of focal length is 16 to 192, i.e., the zooming ratio is 1:12, and aperture ratio is large and which comprises a focusing lens group having positive power, a variator lens group having negative power, a compensator lens group having negative power, an erector lens group having positive power and a master lens group.

REFERENCES:
patent: 3393958 (1968-07-01), Takano
patent: 3549235 (1970-12-01), Macher
patent: 3891304 (1975-06-01), Muszumanski

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