由于前帘呈闭合状态，在此过程中并没有光线进入相机。
At this stage no light has entered the camera, as the front curtain is still closed.
前幕帘落下，后方的感光元件露出，光线进入相机，曝光开始。
The front curtain drops away, revealing the sensor behind, and allows the light to enter the camera, beginning the exposure.
在这样短的曝光下，后幕帘落下，在前幕帘完全打开前遮蔽感光元件。
For such short exposures, the rear curtain starts to fall, covering up the sensor before the front curtain is even fully open.
应用推荐