Patent ID: 9594235
Date: 2017-03-14
CPC Classifications: G02B

Claim:
1. A zoom lens system, arranged in an order from an object side to an image side, comprising: a first lens group having a positive refractive power and comprising: a second lens group having a negative refractive power; an aperture stop; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; and a fifth lens group having a positive refractive power, wherein an Abbe number of each of the second lens, the third lens, and the fourth lens of the first lens group is greater than or equal to an Abbe number of each of the lenses included in the second, third, fourth and fifth lens groups, wherein the second lens group comprises: wherein the third lens group comprises: wherein an Abbe number of the eighth lens is equal to the Abbe number of each of the second lens, the third lens, and the fourth lens of the first lens group.