On the principle of film camera

These problems have been solved long ago.

1. In the past, there were high-speed cameras taking pictures of movement, water droplets and bullets.

The exposure speed of film for shooting high-speed moving photos is not1100 as you said, but high-sensitivity film. The price is very expensive, so the image won't cost. Cameras are also high-speed cameras, not ordinary cameras.

2. A high-speed camera can meet the second point.

3. When showing a movie, the movie is moving continuously, and the lights are always on, mainly according to the characteristics of human eyes, 24 pictures are determined. The speed at which the object shadow stays in the human eye is exactly the speed corresponding to 24 pictures, so that 24 pictures are determined. Otherwise I wouldn't have booked 24 tickets.