This item also called the electronic shutter speed. The unit is ms (millisecond).
Enter a new value in the field, or change the existing value using the
buttons. The larger the value, the brighter the images that will be snapped.
When [Fixed] is specified in [Exposure Mode], this item can be modified with this parameter.
When [Auto] is specified in [Exposure Mode], this item cannot be modified, and the exposure time selected by software when the latest image was snapped is shown.