Hi, I recently bought this for my P510 off eBay. Enables you to add 67mm filters etc to your camera. It screws onto the end of the lens. There are screw threads on the inside. Excellent fit - no problems. I also got some filters and hood. He may be out of them at the moment, but if you contact him he may be able to let you know when they will be available. This is nothing like the other tube types, and it was the only one I could find that wasn't going to cost me a fortune to ship to Australia. There was another similar type available in England, but too expensive.
Cheers
Carol
59525._xfImport[/ATTACH]]67mm Adapter Ring Adaptor Ring for Nikon Coolpix P510 P520 | eBay