The amateur astronomer must consult the exposure meter and not rely on his senses. 业余天文学家必须参照曝光表(EM)而不能光靠感觉。
Exposure meter : An instrument which measures light intensity and provides information for proper exposure. Calibrated for different emulsion speeds. 曝光表(EM):测量光的强度,并根据不同乳剂的感光速度,提供标准曝光时间的仪器。
Selenium cell ( eg the exposure meter of a camera ) 硒光电池(如照相机曝光计中的)。
It is a Wonder View model in a brown leather case and there is an exposure meter in case attached. 照相机是美景牌的,装在棕色的皮套里,另外还带有一个装曝光表(EM)的盒子。
The monitoring ionization chamber for the calibration of exposure meter 用于照射量仪校准工作的监测电离室