ZOOM LENS AND IMAGING APPARATUS

摘要

A zoom lens is constituted by, in order from the object side: a positive first lens group; a negative second lens group; a positive third lens group; a positive fourth lens group; a negative fifth lens group, and a positive sixth lens group. The distances among adjacent lens groups change when changing magnification from the wide angle end to the telephoto end. The first lens group is constituted by, in order from the object side, a negative lens, a positive lens, and a positive lens. The second lens group has a negative 2R lens group constituted by a cemented lens formed by cementing a negative lens and a positive lens, provided in this order from the object side, together, and a negative single lens. The fifth lens group is constituted by, in order from the object side, a negative lens, a negative lens, and a positive lens.

主权项

1. A zoom lens consisting of, in order from the object side to the image side:
a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a positive refractive power; a fifth lens group having a negative refractive power; and a sixth lens group having a positive refractive power; the first lens group moving toward the object side, the distance between the first lens group and the second lens group increasing, the distance between the second lens group and the third lens group decreasing, the distance between the third lens group and the fourth lens group changing, the distance between the fourth lens group and the fifth lens group changing, and the distance between the fifth lens group and the sixth lens group changing, when changing magnification from the wide angle end to the telephoto end; the first lens group consisting of, in order from the object side to the image side, a negative 1A lens, a positive 1B lens, and a positive 1C lens; the second lens group having a 2R lens group having a negative refractive power as a whole and consisting of a cemented lens formed by cementing a negative lens and a positive lens, which are provided in this order from the object side to the image side, together, and a negative single lens; and the fifth lens group consisting of, in order from the object side to the image side, a negative 5A lens, a negative 5B lens, and a positive 5C lens.