Patent ID: 6865026
Filing Date: 2005-03-08
Classification: G02B

Abstract:
1. A zoom lens, comprising a moving lens group B that has positive refracting power and moves only toward an object side of the zoom lens upon zooming from a wide-angle end to a telephoto end of the zoom lens, a lens group A that is located on the object side with respect to the moving lens group B, has negative refracting power and remains fixed during the zooming, and a third lens group C that is located on an image side of the zoom lens with respect to the moving lens group B and moves in a locus different from that of the moving lens group B during the zooming, wherein: the lens group A that remains fixed during the zooming comprises, in order from an object side thereof, a negative lens element, a reflective optical element and a positive lens element having an absolute value of refracting power smaller than that of the negative lens element.