Patent ID: 7199943
Filing Date: 2007-04-03
Classification: G02B

Abstract:
1. A wide-angle zoom lens system, comprising in order from an object side to an image side thereof, a first lens group of negative refracting power, a second lens group of positive refracting power, and a third lens group of positive refracting power, wherein: upon zooming from a wide-angle end to a telephoto end, at least said first lens group and said second lens group move such that a spacing between said first lens group and said second lens group becomes narrow and a spacing between said second lens group and said third lens group becomes wide, said first lens group consists of, in order from an object side thereof, a first lens subgroup SG a second lens subgroup SG upon focusing from a far object point to a near object point, said first lens subgroup SGl said wide-angle zoom lens system is provided as a three-group zoom lens.