I use a UV filter on all my lenses for protection, as I assume many of you do. The only time I take them off is when I want to use another filter. Assuming that the quality of the lens is good, is there any effect on the quality of the image? Is there any special circumstances that you would take the UV filter off temporarily?
For polarizer filter I know that only a circular type filter will not interfere with the autofocus. Is there a type that interferes with the focusing mechanisms of the camera/lens in case of UV filters?