Patent ID: 7199940

Claim:
A zoom lens system comprising, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; and a fifth lens group having positive refractive power, wherein when a state of lens group positions varies from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group varies, a distance between the second lens group and the third lens group decreases, a distance between the third lens group and the fourth lens group varies, a distance between the fourth lens group and the fifth lens group increases, and the third lens group being composed of a front sub-lens group having positive refractive power and a rear sub-lens group locating to an image side of the front sub-lens group with a space, and an image being shifted by shifting a lens group in the third lens group including at least either one of the sub-lens groups substantially perpendicularly to an optical axis.