| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique advantageous in reducing operating noise of a diaphragm device.SOLUTION: In a diaphragm device that restricts the opening of an optical system by a plurality of light-blocking blades overlapping each other, the light-blocking blade 2-A includes a linear contact part 15-A provided with a face that contacts a member adjacent to the light-blocking blade 2-A. |
