I ordered another Fotodiox Nikon to EOS adapter and received their "new" style Nikon F to EOS adapter.

It is different from the older style in that it has a "lip" on the lens side of the adapter.

I didn't realize that this new style will not properly seat on the Pre-Ai Nikon lenses as it will hit the "ears" of Nikon lenses.

The newer AI/AIS lens won't have this issue as the ears are further forward? [I guess one can remove the ears]

The older style Fotodiox adapters[and the older style ones on eBay) do not have this issue.

Anyway, I'm attaching some reference photos in case anyone is interested.

Thanks for posting that john, I use a lot of old nikkors, so thats relevant information.

John:

You can easily remove the "ears" on the pre-AI lens. Unless you are also using the pre-AI lens on a really old Nikon film body for the metering coupling, you don't need the "ears".

Just thought you should know.

Dan