Hello there, I have two L lenses and I want to use clear filters to protect them without affecting the quality of images. Is this possible? What would be the best lenses for that purpose? Are there any brands that are better than others? Should I be looking at the UV filters? If this is important, one lens is the EF 100mm f/2.8L Macro IS USM and my use is primarily insect/flower closeups and also portraits. The other lens I have is the EF 24-105mm f/4L IS USM; for that one I have a polarizing filter, but often I remove it and I don't want to scratch/damage the lens glass. I use it for everything else. Thanks!