RWR wrote:
I have an old cheap adapter, probably Dot Line, that had a simple negative glass to allow infinity focus. IQ took a hit, but I only bought it to adapt the lens for closeups and removed the glass. The present similar Fotodiox adapter might be better. I also have a Fotodiox Pro with the 1.4X glass for Exakta to Nikon and the IQ is very good, so I think the M42 adapter should be as good.