Skylight glass is mainly used to adjust color temperature, effectively absorb ultraviolet rays, and take color photos in sunny sunshine, which can get good color reproduction and high purity pictures. Especially when shooting outdoor portraits on sunny days, it can prevent the reflection caused by objects next to the characters, and keep the skin color of the characters natural and true. In the process of shooting scenery films, the sky often brings a faint blue tone to the whole picture, which can be eliminated after using skylight glass.