Summary: Clean glass, solid mounting, well cut threads, and I had a hard time noticing any additional flair, even if it was intentionaly induced flair. If you use microfiber cloths to clean your filter, you should not have to worry about the issues that some people have with cleaning hoyas.
Pros: Clear Optics, Firm Mount, Strong Construction
Summary: This is perfect for all wide angle lens... This is the perfect protector. After about a week i noticed that the UV filter had SOME BUT LITTLE finger prints on it..... so..... without the UV filter the lens would have been dirty and harder to clean. With the UV filter it's easier to clean because all you really need is an eye glass cleaning cloth and you're set to go.
Pros: Clear Optics, Consistent Effect, Firm Mount, Strong Construction