naruto
GASitis.. finally cured?
The hood, like on all the ZMs is actually of a bayonet type. Line up the white dot on the hood with the black aperture line on the lens and a quick twist - click. The hood fits over the lens' threads, so a filter and/or cap remain attached to the lens.
If you have a 46mm screw-in hood, it would work just fine with the lens and the provided cap. Not sure about the Ultron...
I think it may not quite fit the Ultron. It's a screw-in type of hood. I have been searching for a square hood screw-in type, as the default hood (with and without filter) makes the lens cap impossible to remove in a hurry.