Zoom lens system having high zoom ratio ranging to wide field an

Details Zoom lens system having high zoom ratio ranging to wide field an Zoom lens system having high zoom ratio ranging to wide field an

1990-08-28

1992-04-14

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359676, 359642, G02B 1500

Patent

active

051053110

ABSTRACT:
A compact size zoom lens system ranging to a wide field angle and having a high zoom ratio of up to 10. The zone lens system is composed of, from the object to the image side, a positive first lens group, a negative second lens group, a positive third lens group and a negative fourth lens group, and fulfills the following conditions:

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patent: 4789229 (1988-12-01), Yamanashi
patent: 4822152 (1989-04-01), Yamanashi
patent: 4896950 (1990-01-01), Endo et al.

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