(EN) A zoom lens that has, in order along the optical axis thereof from an object side, a first lens group that has negative refractive power, a second lens group that has positive refractive power, a third lens group that has negative refractive power, a fourth lens group, and a fifth lens group. During power variation, the interval between the first lens group and the second lens group varies, the interval between the second lens group and the third lens group varies, the interval between the third lens group and the fourth lens group varies, the interval between the fourth lens group and the fifth lens group varies, the second lens group and the fourth lens group move along the optical axis across the same trajectory, and at least the third lens group moves along the optical axis.
(ZH) 一种变焦镜头，沿着光轴从物体侧依次具备：具有负的光焦度的第1透镜组；具有正的光焦度的第2透镜组；具有负的光焦度的第3透镜组；第4透镜组；以及第5透镜组，在进行变倍时，所述第1透镜组与所述第2透镜组之间的间隔变化，所述第2透镜组与所述第3透镜组之间的间隔变化，所述第3透镜组与所述第4透镜组之间的间隔变化，所述第4透镜组与所述第5透镜组之间的间隔变化，所述第2透镜组和所述第4透镜组沿着光轴以相同的轨迹移动，至少所述第3透镜组沿着光轴移动。
