When I consider what a princely sum I gelöhnt for my only protection filter ... which I could allow myself some Hoyas. Now I have almost my entire lens equipped park with Hoya UV HMC as a protective filter. I can see no (not at all) call worth compromising image quality, but stride since for example with my 85mm / F1.4 more relaxed through the world. Also LensTip praises the HMC series to the skies - just google. So he prefers to sink their savings in new lenses)