In my film days the use of a UV filter, as lens protection, was a given. When I started digital photography I continued to use UV filters. I began to read about the filters affecting image quality and I did an experiment to see if the UV filter degraded my images. I took photos (using all five lenses I own) with and without the UV filter. I then examined the photos to see if the UV filter degraded the photos. I could not see any difference between the photos. I continue to use my UV filters for protection.