High zoom-ratio zoom lens system for use in a compact camera

Details High zoom-ratio zoom lens system for use in a compact camera High zoom-ratio zoom lens system for use in a compact camera

1989-09-07

1990-12-18

Arnold, Bruce Y.

350427, G02B 1514, G02B 964

Patent

active

049782045

ABSTRACT:
A high zoom ratio zoom lens for a compact camera is disclosed which comprises in order from the object side, a first lens group having a positive focal length, a second lens group having a positive focal length, and a third lens group having a negative focal length. When zooming is carried out from a wide angle side to a telephoto side, the first, second and third lens group are all moved toward the object side so that a distance between the first and second lens groups is increased and a distance between the second and third lens groups is decreased. The zoom lens satisfying the following conditions:

REFERENCES:
patent: 4840467 (1989-06-01), Takada et al.
patent: 4906077 (1990-03-01), Ito

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