Patent ID: 8830593

Claim:
A zoom lens, substantially consisting of: a first lens group having a negative refractive power; and a second lens group having a positive refractive power, provided in this order from an object side; the distance between the first lens group and the second lens group being changed to change magnification; the first lens group substantially consisting of a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, and a fourth lens having a positive refractive power, in this order from the object side; and the zoom lens satisfying the following conditional formulae: 0.00 <fw/f 2 <0.43 (1-5) 0.56 <|f 1 /f 2 |<2.00 (2-4) wherein fw is the focal length of the entire system at a wide angle end, f 1 is the focal length of the first lens group, and f 2 is the focal length of the second lens group.