| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compact zoom lens having a wide angle of view, a high zoom ratio, and high optical performance in the entire zoom area.SOLUTION: The zoom lens comprises, in order from an object side to an image side, a first lens group L1 having negative refractive power, a second lens group L2 having positive refractive power, a third lens group L3 having negative refractive power, and a fourth lens group L4 having positive refractive power. In zooming, respective lens groups move so as to change an interval between adjacent lens groups. The zoom lens satisfies a conditional expression of 1.20<M4/skt<50.00, where M4 is the movement amount of the fourth lens group in zooming from a wide-angle end to a telephoto end and skt is the back focus of an air conversion rate at the telephoto end.</p> |
