How to use UV mirror, sky mirror and polarizer

UV mirror: It is used to filter the influence of ultraviolet rays in the atmosphere on photos (producing fog). Now it has little influence on digital cameras, and now it is generally used as a protective mirror. Sky mirror: it can also absorb ultraviolet rays, but UV mirror can effectively absorb ultraviolet rays, but it has little effect on color balance. In addition to the role of UV mirror, sky mirror can also play the role of color balance.

Polarizer: Also called polarizer, referred to as PL mirror, it is a kind of color filter. The excellent function of polarizer is that it can selectively let the light that vibrates in a certain direction pass through, and it is often used to eliminate or weaken the strong reflection of non-metallic surfaces in color and black-and-white photography, thus eliminating over-bright spots.