Osawa Precision Industries, Ltd.

Katahira Yukio

The optical system includes a variator lens and a compensator lens each adapted for cammed axial movement along the optical axis in response to rotation of a cam tube for varying the focal length of the system in a normal zoom range between a telephoto condition and a wide-angle condition. A control member is coupled to the cam tube and is shiftable between a normal range condition for preventing axial movement of the cam tube during focusing in the normal zoom range and a macrophotographic range condition which effects a cammed axial movement of the cam tube in response to rotation thereof for focusing the system in a macrophotographic range. Radially shiftable and axially shiftable control mechanisms are disclosed.

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Sayama, Japan

Katahira Yukio