Nevertheless, to avoid incorrect exposure, select a larger or smaller aperture, select a faster or slower shutter speed, or use a flash unit as necessary.
为了避免不正常的曝光,可选择较大或较少的光圈,较快或较慢的快门速度,必要时可用闪光装置。
The advantages of this light source were: high resolution, no shutter and no need of optical motion compensation unit.
其优点为分辨率较高、不需要快门和象移的光学补偿。
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