I took my Nikkor 105 micro out to do some shot of salads. I tipped the lens up to clean the glass and saw it was shattered. My heart stopped for only a minute. I took the UV filter off and found no damage to the lens. $15.00 for a new filter vs several hundred or a new lens. I have no clue as to how it happened. Ordered the new filter from B&H. Life goes on.