在拨号盘，快门速度设置增加了在两重增加，使它容易使用。

On the dial, the shutter speed Settings increased in two-fold increments, making it easy to use.

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度过由快门速度设置的曝光时间后，后幕帘落下闭合，曝光停止。

After a period determined by the set shutter speed, the rear curtain now drops to close the camera to light and end the exposure.

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