>>3512535>So outside of film where UV filters are importantNot even that. UV is absorbed almost completely by glass, you need special quartz lens elements to allow it to pass. So a normal multi element lens takes care of UV almost completely. (UV contribution might be 10 stops or more lower than the normal exposure in intensity).
So a “UV” filter doesn’t do anything more than simple glass, or using a lens with an extra element.
And lastly, most films (especially colour ones) have a UV mask in the emulsion filtering stray UV light, and even the B&W ones are more careful with their sensitization and don’t extend into the uv spectrum much, as they used to. Maybe an old style orthochromatic emulsion might, but not most films commonly used.
Long story short, “UV” filters are useless on film too. They’re so useless, that filters that actually did something to cut UV and produce a visible effect, the manufacturers would advertise them as “anti haze” or “skylight” etc., to differentiate them from useless “uv” ones.
