When i bought the lense for the camera, the sales person in the store suggested i buy a $75 filter to "protect" the $1,000 lense. I accepted and bought it 3 years ago....Thank god is all i can say... not sure how it happened by it was shattered. Lense was ok, and all i'm out is a $75 lense... unfortunately no one here sells the 72mm filter i need so i'll have to gamble for the next few days....