Two-stage variable power binoculars
The two-stage variable power binoculars are configured so that, in right and left body tubes focus lenses are movably provided in the direction of optical axis, movable frames are movably provided in a direction so as to intersect with the optical axis, magnification switch lenses are respectively provided in the movable frames a magnification switch knob for moving the focus lenses and movable frames is provided in a center portion connecting the body tubes and the magnification switch knob is operated to move the movable frames so that the magnification switch lenses are disposed at either the high-magnification position on the optical axis or at the low-magnification position set back from the optical axis, and simultaneously, to move the focus lenses so that focus is adjusted.
1. A two-stage variable power binocular comprising:
right and left body tubes and right and left focus lenses, the lenses each being movably disposed in an optical axis direction;
movable frames being movably disposed in a direction so as to intersect with the optical axis direction;
magnification switch lenses being disposed on said movable frames;
a magnification switch knob for moving the focus lenses and the movable frames, said magnification switch knob being disposed in a center portion connecting said right and left body tubes;
said magnification switch knob moving said movable frames for:
positioning said magnification switch lenses either at a high magnification position on the optical axis or a low magnification position set back from the optical axis; and
simultaneously positioning said focus lenses for adjusting focus.