| 摘要 |
<p>A lens device attached to a camera includes a lens barrel, a mount ring, a plurality of pins, a plurality of through holes, a positioning ring, and a fixing member. The lens barrel holds a lens system. The mount ring has a tubular fitted portion which establishes coupling with the camera and a flange portion which is provided around the fitted portion. The mount ring is attached to the lens barrel. The plurality of pins is provided on the lens barrel and positions a central axis of the mount ring with respect to an optical axis of the lens system. The plurality of through holes is formed on the flange portion. The positioning ring has an outer diameter smaller than a hole diameter of the through holes and provided with an opening where the pins are fitted. The fixing member fixes the positioning ring inside the through holes. The pins are restricted by the opening of the positioning ring fixed by the fixing member under a condition where the mount ring is positioned, in order to position the lens barrel and the mount ring with respect to each other.</p> |
