| 摘要 |
<p>A zoom lens comprises, sequentially from the object side, a first lens group (G11) having a positive refractive index, a second lens group (G12) having a negative refractive index, a third lens group (G13) having a positive refractive index, a fourth lens group (G14) having a negative refractive index, and a fifth lens group (G15) having a positive refractive index. The magnification is varied from the wide-angle end to the telephoto end by moving the second lens group (G12) along the optical axis from the object side to the image surface (IMG) side. The correction of the displacement of the image surface caused by the variation of the magnification and the focusing are carried out by moving the fourth lens group (G14) along the optical axis. An image blur caused due to a micro vibration is corrected by moving the entirety of the fifth lens group (G15) in a direction perpendicular to the optical axis.</p> |
