Patents Assigned to Katsuma Kougakukikai Kabushikikaisha
  • Binocular telescope with auxiliary lens system
    Patent number: 5000556
    Abstract: Auxiliary lens cylinders constituting a tele-or wide-conversion lens system can be held in and away from the front of the objective lenses of a binocular telescope, so that the main lens system of the binocular telescope can be converted to a highly magnifying tele-conversion or wide-conversion system without influencing the position of image obtained with the main lens system.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: March 19, 1991
    Assignee: Katsuma Kougakukikai Kabushikikaisha
    Inventor: Syuji Katsuma