I have one that I'll sell for $50. It will fit a dual range summicron, but it has been modified by a po who didn't understand how to mount/unmount the eyes. Normally there is a half sphere indention to keep it locked to the body of the lens, but this one has an area that has been drilled out so the user could remove it even if it should be locked down. I can send a photo if you are interested. It will work for the macro work, but it's not necessarily a beauty.