i have decided that from now on i will stack 20 b+w uv filters in front of all my lenses.
got added effect of making every lens look like a telephoto lens. never mind that my 10-20 will just take very black pictures with a bit of the picture in the middle.. the part that can be seen will be VERY VERY sharp, because defintiely not more uv light to spoil the picture. plus i pay good money for the filter, so it will improve the picture quality one........
at the same time, even if got goat drop down from heavens and land on my lens, it will not crack. can retain resale value.