| 摘要 |
A zoom lens of the present invention includes a first lens group, a second lens group, an aperture, a third lens group, a fourth lens group, and an image surface in sequence along an optical axis from an object side to an image side. The first lens group has positive refractive power, and includes at least two lenses. The second lens group has negative refractive power, and includes three lenses. The third lens group has positive refractive power, and includes at least two lenses. The fourth lens group has positive refractive power. The zoom lens is switched to a telephoto mode from a wide-angle mode by moving the first lens group toward the object side, moving the second lens group toward the image side, and moving the third lens group toward the object side. |
