FINDER AND IMAGING APPARATUS

摘要

A finder is a reverse Galileo type finder comprising, in order from the object side to the eye point side: an objective lens group having a negative refractive power; and an eyepiece lens group having a positive refractive power. The distance between the objective lens group and the eyepiece lens group is the longest distance from among distances between lenses, as an air converted length, in an observation optical system from the objective lens group to the eyepiece lens group. The eyepiece lens group consists of, in order from the object side to the eye point side: a first lens having a negative refractive power; a second lens having a positive refractive power; and a third lens having a negative refractive power. The first lens and the third lens are fixed while the second lens moves in the direction of the optical axis during diopter adjustment.

主权项

1. A reverse Galileo type finder comprising, in order from the object side to the eye point side:
an objective lens group having a negative refractive power; and an eyepiece lens group having a positive refractive power; the distance between the objective lens group and the eyepiece lens group being the longest distance from among distances between lenses, as an air converted length, in an observation optical system from the objective lens group to the eyepiece lens group; the eyepiece lens group consisting of, in order from the object side to the eye point side: a first lens having a negative refractive power; a second lens having a positive refractive power; and a third lens having a negative refractive power; and the first lens and the third lens being fixed while the second lens moves in the direction of the optical axis during diopter adjustment.