Patent ID: 7738184

Claim:
A zoom lens consisting of, in order from its object side, a first lens group of negative refracting power, and a second lens group of positive refractive power wherein zooming from a wide-angle end to a telephoto end is implemented by changing a distance between the respective lens groups, wherein: said first lens group consists of, in order from its object side, a front unit of negative refracting power, and a rear unit of negative refracting power, wherein: said front unit consists of, in order from its object side, a first lens that has negative refracting power and meniscus shape, and includes an aspheric surface, and a second lens that is smaller than the first lens in terms of an absolute value of refracting power, and includes an aspheric surface, said rear unit consists of, in order from its object side, a third lens of negative refracting power, a fourth lens of negative refracting power, and a fifth lens that has positive refracting power and is convex on its object side, and upon focusing from infinity to point-blank range, said rear unit moves in such a way as to draw nearer to the object side as a space between said front unit and said rear unit becomes narrow.