Originally posted by lukulele Full Scuppernong grape indeed Larry! Back to the lab and some flat black or black athletic tape for the adapter as a start?
Usually the internal reflections of the adapters that I have experienced will show up as smoke or haze in the shot.
I don't see that in your shots with this lens, so not sure it will help much.
The purple fringe is usually a result of older lens design and lack of coatings, so stopping down helps a little bit.
Sometimes all you can do is try to remove it in post.