IMAGING LENS AND IMAGING APPARATUS

摘要

An imaging lens, consisting of a first lens group, a top, and a second lens group having a positive refractive power, in order from the object side, in which the first lens group is composed of a first front lens group having a negative refractive power and a first rear lens group having a positive refractive power in order from the object side, the first rear lens group is composed of a cemented lens formed of a negative lens and a positive lens, the first front lens group at least includes four negative lenses, and at least two of the negative lenses included in the first front lens group satisfy a conditional expression given below:;70<νd1n  (1).

主权项

1. An imaging lens, consisting of a first lens group, a stop, and a second lens group having a positive refractive power, in order from the object side, wherein:
the first lens group is composed of a first front lens group having a negative refractive power and a first rear lens group having a positive refractive power, in order from the object side; the first front lens group at least includes four negative lenses and at least two of the negative lenses included in the first front lens group satisfy a conditional expression (1) given below; and the first rear lens group is composed of a cemented lens formed of a negative lens and a positive lens and satisfies a conditional expression (4) given below:
70<νd1n  (1)1.5 νd1n: Abbe number of the lens concerned with respect to the d-line, T12: thickness of the first rear lens group on the optical axis, and f: focal length of the entire system.