Originally posted by abruzzi I’m trying to get a sense what the benefit is for film and when I should use it (if ever)
At one time, before the depletion of the ozone layer, UV was really only a concern at high altitudes. Today, even at sea level, the UV index is high.
I shoot black & white film often and using a UV filter helps to render blue skies the correct tonal value of grey. Without it, skies tend to be washed out on black and white prints (and overexposed on the negs).
However, I often use a yellow filter for B&W and donʻt need to and avoid stacking filters. For color film, I usually use a polarizer, but if not, a good multicoated UV is always used in daylight. Negs and higher ISO films are more forgiving than slides and lower ISO films.