Have the 58mm and the 72mm filter. Used both as an "always on it 'filters for my lenses. The build quality is really very high and the thread fits properly on the lens. Any loss of quality, I could not find in my pictures. Could also no difference for 30 cheaper Tamron see filters. For this, the filter would probably be tested in the laboratory. For digital SLR cameras, a UV filter is definitely no longer necessary, as a UV filter in the camera itself sits in front of the sensor. But who wants to have a protective filter and necessarily the best who must :-) that does not pass this filter.