What is rainbow lens?

Rainbow lenses are optical filters that produce a rainbow-like effect by diffracting white light into its constituent colors. These lenses are commonly used in photography, fashion, and film to add a unique visual effect to images and videos. The effect is created by a special coating or layer on the lens that reflects light in a way that produces rainbow colors. Rainbow lenses come in different shapes and sizes, and can be attached to camera lenses, sunglasses, or even used as standalone props. They are popular among social media users and influencers for creating visually appealing content.