| 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, a gap between the third lens group G3 and the fourth lens group G4 changes, and a gap between the fourth lens group G4 and the fifth lens group G5 changes. When a focal length of the fourth lens group G4 is f4 and focal length in the wide angle end state of the zoom lens ZL is fw, the following conditional expression is satisfied: 0.510<f4/fw<0.580. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
