recommended but more needed
All camera should have replacement or protective lenses put in front of them. I purchased this item then used the size adapter included to place aftermarket UV protective and Polarize lenses on the camera. SO if something hits the lens I just have to pull off and replace the aftermarket lenses. The plastic lenses I would not use for they will scratch easily.
I purchased the 37mm rings separately and they just screw on; $4.00 each.