Patent ID: 7986467

Claim:
A zoom lens composed by arranging, in the order from an object side, a first lens group having a weak refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, and configured to perform zooming by moving the second lens group and the third lens group, characterized in that: the first lens group is composed by arranging in the order from an object side, a single lens having a negative refractive power, a prism for folding an optical path, and a single lens having a positive refractive power; and the second lens group is composed of one single lens having a negative refractive power, and satisfies the following conditional formula (1): t 2/ fw< 0.4 (1) where t 2 represents the center thickness of the single lens having a negative refractive power constituting the second lens group, and fw represents the focal length of a whole lens system at a wide-angle position.