I see the occasional debate about the ability of a filter to save the front element of a lens. My 16-year old daughter carries a Canon XT everywhere and it generally lives a pretty rough life. Last weekend she had the camera knocked from her hands. The camera landed lens downwith the requisitenoise of glass breaking.When she got home we removed the filter andto our surprise the front lens element isundamaged.
This incident has me looking at my lenses again tosee what is not wearing afilter.