Does landscape photography have to be equipped with a polarizer? Which is more used in landscape photography, polarizer or medium gray gradient lens? Can the polarizer be used as a mirror with medium

Does landscape photography have to be equipped with a polarizer? Which is more used in landscape photography, polarizer or medium gray gradient lens? Can the polarizer be used as a mirror with medium gray density? In fact, if you pursue natural colors, you don't need to consider filters. Polarizer, medium gray mirror and gradient mirror have different functions. Polarization mainly reduces unnecessary reflection, medium gray reduces brightness, and gradient increases saturation. All three can reduce brightness and have different effects. Generally speaking, the film quality without filter is much better than that with filter. Basically, the effect of the filter can be made later, so the use of the filter is unnecessary. Moreover, only high-grade filters can give full play to their own effects, and low-grade filters have little effect. The quality of movies mostly depends on time, weather, light, lens and machine itself. Using these factors is much more practical than installing filters.