I had an accident a few days ago in which my lens made contact with cement. Thanks and praise, I had a lens filter on just in case. It was bent out of shape and I had to have it sawed off, but my lens survived. Undamaged. However, in between the injury and hospital, I took a few shots because I loved the way they were turning out. Unfortunately though, they could not salvage my filter. Looks like I will just have to buy one and break it so I can continue to take pictures like this.