Zoom lens, camera, and portable information terminal device

Details Zoom lens, camera, and portable information terminal device Zoom lens, camera, and portable information terminal device

2005-01-04

2005-01-04

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S682000

Reexamination Certificate

active

06839183

ABSTRACT:
A zoom lens includes a negative first group optical system, and a positive second group optical system, which are sequentially arranged from an object side, and an aperture stop disposed on the object side of the second group optical system moving integrally therewith. During change of magnification from a short focal end to a long focal end, the second group optical system monotonously moves from the image side to the object side, and the first group optical system moves so as to correct displacement of an image plane position in accordance with the change of magnification.

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