I currently run UV filters on my lenses and i spend a lot of time wondering why! This filter is pretty well built with both a front and rear thread which is very helpful, allowing the stacking of filters. For example, a circular polarizer could be put in front, as could an ND. The ring is tough as anything and won't break easily but the glass is far from being super high quality. It doesn't cause too many artifacts at all and any it does are correctable but to be fair you don't even need to do that as the pictures are usable straight out. As always with UV filters though, remember you are adding another piece of glass to the equation so it WILL lower the quality of your .  Read the complete review