Patent ID: 8395847

Claim:
A zoom lens comprising sequentially from an object side: a first lens group having a negative refractive power; a diaphragm; and a second lens group having a positive refractive power, wherein zoom from a wide angle edge to a telephoto edge is performed by displacement of the second lens group along an optical axis, toward the object side, correction of imaging plane variation accompanying the zoom, is performed by displacement of the first lens group along the optical axis, the second lens group includes sequentially from the object side, a positive first lens having at least one aspheric surface and a positive second lens, and a first condition υd 21 >63 and a second condition υd 22 >70 are satisfied, υd 21 being the Abbe number for a d-line in the first lens of the second lens group and υd 22 being the Abbe number for a d-line in the second lens of the second lens group.