If I use 40 seconds shutter time to make sure the sea level is exposed normally, the sky will be over exposed.
因此若要一次拍摄完成且海面要曝光正常的话,需要40秒的快门时间,但这样天空就会过曝。
Time resolution can be achieved by controlling the shutter time of the image intensifier with an electronic pulse.
通过电子快门控制像增强器开启时间实现时间分辨。
In the same aperture value, I have found that the sky needs four seconds shutter time, but 40 seconds for the sea level.
在一样的光圈值,我测得天空需要4秒的快门时间,但海面需要40秒。
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