NiSi 49mm Armor FX PRO Nano L395 UV-Schutzfilter

The coating on this filter repels water so effectively that rain droplets just bead up and roll off, which saved a shot in light drizzle. It's surprisingly thin too, so there's no noticeable vignetting even on my wide-angle lens. My lenses feel better protected now without any drop in image sharpnes

I got this for my 24-70mm and the nano coating really makes cleaning smudges off a breeze. It's so thin I can't even tell it's on the lens, but I feel way better about shooting in dusty conditions now.

Finally got this on my favorite wide-angle lens, and the thread is so smooth it screws on without any wobble. The nano coating seems to repel smudges really well, which is a huge plus when shooting in damp conditions.