Originally Posted by Warren T.
3. any Nikon lens can be mounted on a standard Nikon to mu-43 adapter including non-ai and ai.
This should be true but...
... it is possible that some adapters won't accept non-AI lenses, though I don't that this is common with the exception of the rare lenses Nikon sold during the first year or two, 1959-61. These have a very deep overhang (~3mm) on the f/stop ring and come to grief on bodies (all metered Nikkormats) and adapters with the more shallow flanges. The overhang on the bulk of the pre-AI lenses is shallow (~1.5mm) and usually doesn't cause problems on any body or adapter that doesn't have the AI and/or newer coupling tabs.
BTW, there are some adapters made that have a control ring that allows you to adjust the aperture on G series lenses where there is no f/stop ring. I haven't used one, but it seems like these would function like a pre-set lens (one ring for f/stop on the lens and one open/close ring on the adapter) when used with AI and pre-AI lenses. If so, this would be somewhat nicer than the pure manual function you get with standard adapters.