Zoom lens, camera apparatus and portable information...

Details Zoom lens, camera apparatus and portable information... Zoom lens, camera apparatus and portable information...

2007-10-02

2007-10-02

Perkey, W. B. (Department: 2851)

Photography

Having variable focal length of camera objective

C348S240300, C359S684000, C359S714000, C359S764000

Reexamination Certificate

active

10631744

ABSTRACT:
A zoom lens having five lens groups arranged in succession. The zoom lens is configured such that when zooming from a short focal length end toward a long focal length end, the second lens group lens moves toward the third lens group and the fourth lens group moves toward a side of the third lens group, and the fifth lens group corrects the zooming and a shift in a position of an imaging plane of the zoom lens caused by movement of the third lens group and the fourth lens group.

REFERENCES:
patent: 6718132 (2004-04-01), Nishina
patent: 6-180424 (1994-06-01), None
patent: 3109342 (1995-06-01), None
patent: 9-90221 (1997-04-01), None

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