The four-leaf sun visor is mainly used to photograph jewelry and valuables. Because the appearance of jewelry and valuables usually reflects light, using a four-leaf shutter can effectively block some light, reduce reflection and shadows, and improve the quality and details of photos. At the same time, the four-leaf shutter can also focus light, making the display of items more prominent. Therefore, this kind of shooting props is common in jewelry stores, auction houses and other places where treasures need to be displayed.