Patents Assigned to Minolta C., Ltd.
  • Zoom lens system
    Patent number: 5786941
    Abstract: A zoom lens system includes a plurality of lens units. First to third focal length zones are set according to the focal length. During focusing, in the first focal length zone, the lens units are moved at a first constant ratio, and in the third focal length zone, the lens units are moved at a second constant ratio which is different from the first constant ratio. In the second focal length zone, the movement ratio of the lens units varies according to the focal length.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: July 28, 1998
    Assignee: Minolta C., Ltd.
    Inventors: Minoru Kuwana, Hitoshi Hagimori, Junji Hashimura