Low grade plastic

You pay 9 euros for as a ballpark piece of plastic, because you want to be sure to use a round glass and protective eye cup, and then hoping of course that Nikon as used at least clever plastic, if the price is so high.

I have the adapter installed, and later with the matching round eyecup. Now, after a little more than a year has dawned one of the retaining tabs. And, although I can count it on one hand how many times I off the adapter and have been mounted.

Keep doing it still, but he no longer engages, and can be removed easily.

Well! : (