| 摘要 |
A lens apparatus for a surveillance camera where an operation ring is rotatably provided on an outer periphery of a lens barrel body, comprising: a cover which is provided on the lens barrel body to cover an outer periphery of the operation ring; a threaded hole which is formed in an outer peripheral surface of the operation ring; a slit which is circumferentially formed in a peripheral surface of the cover; and a knob which has a body part and a threaded part and is attached to the operation ring by screwing the threaded part into the threaded hole through the slit, wherein the operation ring is locked by tightening the knob and holding the cover between the operation ring and the body part of the knob.
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