| 摘要 |
A click stop mechanism for an interchangeable lens. A first click stop ball is adapted to engage with any of a plurality of click grooves formed in an inner wall of an aperture preset ring corresponding to both manual aperture preset marks and an automatic aperture preset mark. A switch button protrudes through a stationary ring in which the first click ball is fitted and the switch pin is slidably disposed in the hollow switch button with a coil spring therebetween. A second click ball is disposed so as to engage in either of two click grooves formed on opposite sides of the base portion of the switch button corresponding to the minimum manual aperture preset mark and the automatic aperture preset mark.
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