| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a zoom lens having excellent imaging performance. <P>SOLUTION: Provided is a zoom lens ZL which has a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having positive refractive power, and a fifth lens group G5 having negative refractive power. In zooming from a wide angle end state to a telephoto end state, a gap between the first lens group G1 and the second lens group G2 changes, a gap between the second lens group G2 and the third lens group G3 changes, and a gap between the third lens group G3 and the fourth lens group G4 changes. When a focal length of the third lens group G3 is f3, a focal length of the first lens group G1 is f1 and a focal length of the second lens group G2 is f2, the following conditional expressions are satisfied: 1.10<f3/f1<3.00 and 2.80<f3/(-f2)<3.80. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
