公开(公告)号：US20040223230A1

公开(公告)日：2004-11-11

申请号：US10836224

申请日：2004-05-03

Applicant: PENTAX Corporation

Inventor： Masakazu Saori

IPC: G02B015/14

CPC classification number: G02B15/177

Abstract: A wide-angle zoom lens system includes a negative first lens group, a positive second lens group, a negative third lens group, and a positive fourth lens group. Upon zooming from the short focal length extremity to the long focal length extremity, the distance between the negative first lens group and the positive second lens group decreases, the distance between the positive second lens group and the negative third lens group increases, and the distance between the negative third lens group and the positive fourth lens group decreases; and the positive second lens group, the negative third lens group and the positive fourth lens group move toward the object. The wide-angle zoom lens system satisfies the following conditions:1.2

Abstract translation: 广角变焦透镜系统包括负第一透镜组，正第二透镜组，负第三透镜组和正第四透镜组。 当从短焦距末端变焦到长焦距极限时，负第一透镜组与正第二透镜组之间的距离减小，正第二透镜组与负第三透镜组之间的距离增加，并且距离 在负第三透镜组和正第四透镜组之间减小; 并且正的第二透镜组，负的第三透镜组和正的第四透镜组朝向对象移动。 广角变焦透镜系统满足以下条件：1.2 <| f（i = 1）/ fw | <2.0（1）1.5

公开(公告)号：US20040150894A1

公开(公告)日：2004-08-05

申请号：US10762378

申请日：2004-01-23

Applicant: PENTAX Corporation

Inventor： Masakazu Saori

IPC: G02B013/02 ,  G02B009/04

CPC classification number: G02B13/04

Abstract: A wide-angle lens system includes a negative first lens group, and a positive second lens group, in this order from the object. The negative first lens group and the positive second lens group are positioned so that the distance between the negative first lens group and the positive second lens group is set as the maximum distance in the wide-angle lens system. The wide-angle lens system satisfies the following conditions: 2.0

Abstract translation: 广角镜头系统包括负的第一透镜组和正的第二透镜组，按照该物体的顺序。 负的第一透镜组和正的第二透镜组被定位成使得在第一透镜组和正的第二透镜组之间的距离被设置为广角透镜系统中的最大距离。 广角镜系统满足以下条件：2.0