Is UV lens or polarizer better for SLR lens?

UV mirror: also known as ultraviolet filter, that is, ultraviolet. Generally, it is colorless and transparent, but some of it will appear purple or purplish red at some angles because of the antireflection film.

Polarizer: Also known as polarizer, it is a lens that uses the characteristics of polarized light to filter and eliminate the reflection of nonmetallic objects and water. It can eliminate the reflection and make the color brighter. Some movies are even shot with polarizers to make the picture more colorful.

These two filters are completely different in function. One is the basic protective filter (UV mirror), and the other is the functional filter (such as polarizer and medium gray mirror). From the appearance, the polarizer is gray and opaque; Uv mirror is colorless and transparent; Functionally, the main function of the uv mirror is to absorb ultraviolet rays with a wavelength below 380 mm and protect the lens from dust and water. The function of polarizer is different. It is mainly used to eliminate or weaken the reflection on the surface of non-metallic objects, so as to eliminate or reduce light spots. It is an ideal filter for shooting highly reflective objects such as water and glass. Because a part of the light is filtered, the incident light of 1-2 will be reduced after the polarizer is used. Uv lens is used on the lens for a long time to protect the lens. If you use it for a long time, or pursue transparent and high-quality photos, it is better to use it alone, because one more layer is better than one less.