A zoom lens system comprising: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a positive refractive power; and a sixth lens group having a positive refractive power, wherein the first to sixth lens groups (G1 to G6) are sequentially arranged along an optical axis from an object side to an image plane side, and wherein the zoom lens system is configured to perform zooming between a wide-angle position and a telephoto position by moving at least one of the second lens group, the fourth lens group and the fifth lens group along the optical axis, wherein a distance between a focal point of light having a first wavelength (λ 1) and a focal point of light having a second wavelength (λ 2) is about 50 μm or less at the wide-angle position and the telephoto position, and wherein the first wavelength (λ 1) corresponds to green light, the second wavelength (λ 2) corresponds to near infrared light, characterized in that the third lens group comprises a positive lens and a negative lens sequentially arranged from the object side, and at least one surface of the negative lens is aspherical, and an Abbe number of the positive lens of the third lens group is less than an Abbe number of the negative lens of the third lens group, and in that the zoom lens system satisfies a following condition: 30 < Vd 32 < 38 where Vd 32 is an Abbe number of the negative lens of the third lens group, and in that the third lens group consists of two lenses. a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a positive refractive power; and a sixth lens group having a positive refractive power, wherein the first to sixth lens groups (G1 to G6) are sequentially arranged along an optical axis from an object side to an image plane side, and wherein the zoom lens system is configured to perform zooming between a wide-angle position and a telephoto position by moving at least one of the second lens group, the fourth lens group and the fifth lens group along the optical axis, wherein a distance between a focal point of light having a first wavelength (λ 1) and a focal point of light having a second wavelength (λ 2) is about 50 μm or less at the wide-angle position and the telephoto position, and wherein the first wavelength (λ 1) corresponds to green light, the second wavelength (λ 2) corresponds to near infrared light, characterized in that the third lens group comprises a positive lens and a negative lens sequentially arranged from the object side, and at least one surface of the negative lens is aspherical, and an Abbe number of the positive lens of the third lens group is less than an Abbe number of the negative lens of the third lens group, and in that the zoom lens system satisfies a following condition: 30 < Vd 32 < 38 where Vd 32 is an Abbe number of the negative lens of the third lens group, and in that the third lens group consists of two lenses.