Really liking these filters! Although, even after realizing they would be a pain to install/uninstall in the field, and deciding I would do the install/uninstall at home before leaving, I stupidly went ahead and took them out to the field today. While installing one, on the picnic table, yeah, the cover fell through a crack. Broke the UV lens right in half! Why do we do stupid things like this?! Anyhoo............... good thing my backup P3P will arrive tomorrow!