| 摘要 |
A focal-plane shutter for a camera has a base plate having a shutter opening and which is connectable to a body of the camera having a rear cover which can be opened and closed during a film replacement operation. The focal-plane shutter has an opening sector group having sectors for undergoing opening movement in an operational state to open the shutter opening during a shutter release operation, and a closing sector group having sectors for undergoing closing movement in an operational state to close the shutter opening during the shutter release operation. A control device controls the opening sector group and the closing sector group to open and close the shutter opening, respectively. A holding device holds the closing sector group at a nonoperational position during an opening state of the rear cover of the camera and releases the hold of the closing sector group in the nonoperational position during a closing state of the rear cover of the camera. A locking lever prevents opening of the rear cover before setting of the shutter.
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