| 摘要 |
An image-forming lens includes, in order from an object side to an image side, a first group having a negative power as a whole, the first group consisting of a positive meniscus lens having a convex surface on the object side and a negative meniscus lens having a convex surface on the object side, the positive meniscus lens and the negative meniscus lens being cemented, an aperture stop, a second group consisting of a positive meniscus lens having a convex surface on the image side, a third group consisting of a positive meniscus lens having a convex surface on the image side, a fourth group consisting of a lens having a negative power, and a fifth group consisting of a biconcave lens. |
