If you then get a quite cheap piece of plastic as here, that has something of rip-off (sorry, Olympus).
In addition, you have to unscrew the plastic ring on the lens front to attach the lens hood can. This then goes back around in your pocket and will hopefully not be lost ...
Which tinkerer invents such nonsense?
Nevertheless, three stars gets the lens hood, because they fit perfectly (unlike many third-party product) and has exactly the effect that I want.