There is an ongoing debate in the photography community, if one should use UV filters (or similar “zero effect” filters). I was never a big advocate for any of the camps, but slid a UV filter on all my lenses just in case.
As of this now, I am a firm member of the first camp.
The filter broke completely. I removed it and using a blower made sure that all the small and sharp glass was removed.
While I hate losing an ~$80 filter, I love not losing a ~$1600 lens. And think it is worth paying that little performance degradation.
What do you think? Are you Using protection filters?