As long as we will fully open aperture zoom lensWhen we look at the lens surface, the color is to be able to see the reflected light actions, in general, so the darker, darker sense of the eye, indicating the less reflection, the more effective this type of coating. We are in the end is clean or not clean it? My experience is that the lens is always more friction wo...2020.11.19 00:50China Indoor type polyester re