How do SLR cameras shoot moving pictures?

1- Method of improving shutter speed (choose large aperture and high sensitivity if necessary): the instant solidification gives people the feeling of time stop, and the shutter service time exceeds 800th of a second.

2- Ways to slow down the shutter speed (choose low sensitivity if necessary, and the aperture should be adjusted according to the depth of field): improve the sense of movement and increase the interest. For example, if the target runs across the screen at high speed and the audience is clear, then you can choose more interesting audience expressions after the target is blurred.

3- Focus chasing (a stable tripod is needed, and more lenses are needed to select a good film): Focus chasing is a difficult way to shoot sports, but its effect is also very special, which requires high shooting location, equipment and photographers. If it is a race, choose the approximate center of the runway, put the tripod in place, and predict the time and speed of the athletes running past the lens. After the focus shooting starts, the lens rotates horizontally with the athlete, and the shutter time is adjusted between 1/2s and1sec. During the start of the shutter, the lens rotates horizontally with the athlete. The picture taken in this way is very clear to the athletes, with a string of shadows running behind them, leaving only ribbons in the audience.