| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a new imaging lens system that has good performance, and excellent compactness.SOLUTION: An imaging lens comprises: a first group having a positive refractive power and a second group having a positive refractive power that are arranged in this order from an object side to an image side,; and a diaphragm 8 between the first group and the second group. The imaging lens displaces the first group and the second group at a different delivery amount from each other to focus on a finite object distance. The first group comprises five or less lenses including two negative lenses and two or more positive lenses, in which a lens on the most object side is a negative meniscus lens L1 having a convex surface directed toward the object side. The second group comprises five or less lenses including at least a pair of a cemented lens of positive and negative lenses and a negative lens and a positive lens. An air interval d1between the negative meniscus lens L1 located on the most object side in the first group and a positive lens L2 adjacent to the negative meniscus lens L1 on the image side, and an air interval d1between the positive lens L2 arranged second from the most object side in the first group and a lens L3 adjacent to the positive lens on the image side, satisfy predetermined conditions.</p> |
