What's the use of opening the shutter button on Sony camera?

Without touching the shutter, this software can start the shutter without touching the camera, without releasing the phone or cable, thus reducing the vibration of the camera. The main working principle of contactless shutter program is the eye sensor function of electronic viewfinder. When using the camera, human eyes will automatically close the LCD screen to watch the camera. With this sensor, Sony has given it more functions. When you open the program, you just need to wave your hand in front of the viewfinder. If A7S and A7II cameras are used, they can be used to start and close B shutter exposure shooting.