How much is the shutter for 30 seconds

The exposure time of the camera is 30 seconds.

Shutter 30 seconds means that the camera is exposed for 30 seconds when shooting. This is a long exposure time, which is used for long exposure photography, such as night photography and starry sky photography. When shooting, you need to use a tripod or other fixed equipment to prevent the camera from shaking and ensure the clarity of the photo.