When taking forward and side light photography, it is possible to avoid surrounding scattered light from entering the lens. Shielding the side light source, reducing and enhancing photo color and saturation; When with backlit, side light, or flashlight, it can the entry of non imaging light and avoid fog. During lighting photography or nighttime photography, it is possible to avoid surrounding light entering the lens. The use of Lens hood does not affect the use of various in front of the lens. Special model, no dark corners will be generated.