Perhaps I was expecting a little much - after all, this filter didn't cost a great deal and I'm used to using Hoya HD filters on my SLR lenses. However, in both an indoors party last weekend, and an Alps mountaineering trip this summer, there are a large proportion of images that have suffered from flare. When I noticed this in the Alps, I kept the camera in the exact same position, and took the same picture both with and without the filter within seconds. Those taken with the filter attached had a green flare cast across the midframe, which wasn't duplicated in those shots taken without it. Perhaps this is ok as a *cheap* protective filter, but I shall be looking elsewhere for a filter to replace this with - too bad Hoya don't make their HD series in this 46mm size!
I hope this helps!