What is a polarized lens?

Polarizing lenses, also known as polarizers, can be divided into circular polarization (cpl) and linear polarization (pl). Light itself is an electromagnetic wave. After reflection and diffusion, the vibration in a certain direction will weaken, thus becoming polarized light. Therefore, the reflection of the smooth surface and the diffused light in the sky are polarized light, which will affect the clarity of photographic imaging. The polarizer can choose to let the light vibrating in a certain direction pass through, which can weaken the reflection on the surface of the object, highlight the blue sky and white clouds, and darken the sky. It is very useful in still life photography and landscape photography.