Is the UV mirror issue very important to film machines?

UV lens is also called ultraviolet filter, namely UltraViolet. UV lens is suitable for shooting in environments such as seaside, mountains, snowfields and open areas. It can weaken the blue tone caused by ultraviolet rays and offset some The turbidity of the atmosphere makes the photo transparent. It’s not that it’s very important, but it has a range of effects. For example, if you take close-up portraits, the UV filter is almost useless.

The above is for film, but for CMOS, the function of the UV mirror is only to protect the mirror.