Mobile phones need polarizers to shoot jewelry. Using Canon 100 macro to shoot jewelry, it is best to use a polarizer. The function of polarizer is to selectively let the light that vibrates in a certain direction pass through, and it is often used to eliminate or weaken the strong reflection on the surface of the object in photography, thus eliminating or reducing the light spot. When shooting jewelry, use a polarizer. By rotating the polarizer to the most suitable angle, the messy spots on the jewelry surface can be eliminated or alleviated, making the photos of jewelry clearer and more beautiful.