| 摘要 |
Binoculars of the center focus type having a pair of bodytubes connected together through an axis shaft comprise a focus adjusting rotational member rotatably supported on the axis shaft, a moving member supported on the axis shaft in proximity to the rotational member and provided for axial movement along the axis shaft, a mechanism for arbitrarily moving the moving member only axially, and a lock mechanism responsive to the movement of the moving member to preclude the rotation of the rotational member.
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