Excerpt: This is my second one, which I use mostly for lens protection. (Once a lens was saved by the filter being there!) Depending on the lens, I need to remove it when using a polarizing filter to avoid vignetting.
Excerpt: I use UV filters on my more expensive lenses as protetion for the front element, nothing more. I saw several negative reviews online complaining that these filters do not provide any benefit in haze. That is correct! They may be poorly named, being basically just clear glass.
Excerpt: As claimed by Hoya, "anti-reflective coating on each side of their glass…. to minimize flare and ghosting" "provide additional benefits of correction for Ultraviolet(UV) light which can register on film and videotape as a bluish cast and can obscure distant details.