Black mist 1: The soft focus effect is the strongest and the haziness of the picture is the most obvious. It is recommended to use when the contrast between light and shadow is large, or the highlight range is small. Black mist 1/2: The soft focus effect is stronger and the image is more hazy. It is recommended to use if the contrast between light and shadow is large, or in an environment with large contrast between light and shadow. Black mist 1/4: The soft focus effect is relatively mild, the soft focus range is moderate, and it is quite versatile, also suitable for environments with little contrast between light and shadow. Black mist 1/8: The soft focus effect is the lightest, and sometimes it is not even obvious when there are few highlight areas. However, this gentlest soft focus also brings the greatest applicability, and the effect is very good when used in environments with various light ratios.