| 摘要 |
A zoom-lens system provided with a first lens group having positive optical power, a second lens group having negative optical power, and a third lens group having positive optical power, in that order from the object side to the image side. The first lens group has a lens element that has a reflective surface for changing the direction of the light rays from the object. The second lens group has two lens elements. The third lens group is designed so as to be able to move in a direction perpendicular to the optical axis in order to optically correct blurring of the image. When zooming from the wide-angle end to the telephoto end during imaging, the second lens group moves along the optical axis, but the first lens group does not move along the optical axis.
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