Why does the picture brightness change with the change of shutter de?

The shutter controls the light entering time. The slower the shutter speed, the longer the light entering time, the greater the light entering amount and the brighter the picture. On the contrary, the higher the shutter speed, the shorter the light entering time, the smaller the light entering amount and the darker the picture; Door B, that is, the light bulb door, can freely control the light entry time and completely look at the feeling, otherwise the exposure time is too short or too long, which will affect the photo, so it is necessary to find the best feeling of taking pictures through a lot of practice! In addition, you can refer to/question/156262987.html to learn about the light bulb door. I hope it helps you!