Imaging lens and imaging apparatus

摘要

An imaging lens consists essentially of, in order from the object side, a first lens group having a positive refractive power, a stop, and a second lens group having a positive refractive power. The first lens group includes, in order from the object side, two successive positive lenses, and a negative lens having a concave surface toward the image side. The second lens group includes, in order from the object side, a lens having at least one aspheric surface, and a three-lens cemented lens. The three-lens cemented lens has a positive refractive power, and is formed by cementing three lenses consisting of, in order from the object side, a positive lens having a convex surface toward the image side, a negative lens, and a positive lens.

主权项

1. An imaging lens consisting of, in order from an object side:
a first lens group having a positive refractive power; a stop; and a second lens group having a positive refractive power, wherein the first lens group comprises, in order from the object side, two successive positive lenses, and a negative lens having a concave surface toward an image side, and the second lens group comprises, in order from the object side, a lens having at least one aspheric surface, and a three-lens cemented lens, wherein the three-lens cemented lens is formed by cementing three lenses consisting of, in order from the object side, a positive lens having a convex surface toward the image side, a negative lens, and a positive lens, and the three-lens cemented lens has a positive refractive power, wherein the condition expression (1) below is satisfied:
1.8