A flash light cannot brighten a light source: When using the flash light, the camera is ready to receive the darn strong light reflected back, hence less light is taken in.

• 用闪光灯拍照，照不到其他光源：当使用闪光灯时，相机曝光时会自动调成接收闪光模式，因此更加拍不到原本就弱的光源。