My wife and I both prefer the reassurance of having a filter on the front of our lenses. I have a preference for taking them off to reduce reflections when doing long exposure night photography. I noticed Olympus sells filters in specific sizes for their lenses. They're not inexpensive. Olympus claims to have put specific effort into their performance with their lenses. I'm curious if anyone has any experience with the performance of these filters in comparison to others, or have any suggestion on what filters would be comparable.