In photography, the slow shutter has a special effect on running water, but the shutter of the first picture is 1, and the shutter of the second picture is 4 seconds, but I

The slow shutter can make the flowing water and other moving objects present superimposed images on the negative or photoelectric sensor, and the human eye and brain will subconsciously identify the movement trend of the images, thus constructing the imaginary effect of the water or moving objects, thus generating a sense of movement.

In the above two pictures, it is obvious that the scope of the first picture is smaller than that of the second picture, and the shooting distance of the second picture is farther than that of the first picture.

According to the imaging principle, when the water flowing distance in the first picture is small, the moving distance on the photosensitive device is larger than that in the second picture, thus producing a better dynamic effect.

In addition, the speed and stability of water flow are also related to the dynamic effect of photos.