| 摘要 |
A zoom lens system includes, in order from the subject side to the image side thereof, a first lens group of positive refractive power, a second lends group of negative refractive power, a third lens group of positive refractive power, and a fourth lens group of positive refractive power. The zoom lens system satisfies the following formulas: −0.15<L3/Lt<−0.35, wherein, L3 is the movement vector of the third lens group during the zoom lens system moves from the wide-angle state to the telephoto state. The movement vector is a positive value when the third lens group moves from the object side to the image side. The movement vector is a negative value when the third lens group moves from the image side to the object side. Lt is the total length of the zoom lens system along the optical axis when in the telephoto state. |
