I switched from a raynox dcr-250 to a raynox dcr-150 and what a difference it made. I was able to move the coin further from the camera and move the lights more straight down on the coin. Changed the background from black to white, don't know if that made any difference. I also made some tubes for the led lights to concentrate the light more onto the coin.
The first pic is with the dcr-250 & second with dcr-150.


No post-processing involved just crop and resize. Still have some adjusting to do, but getting closer.