Previously I had posted a question about using protective UV filters on Leica lenses. Responses were posted on both sides of the question, but it was interesting to hear that some choose to use them. I am in the "too expensive to take chances" group.
As I now have IR cut filters, can I use these same filters on an M9 to keep my lenses protected? Or do they have a negative effect on metering, color rendition, contrast, etc?