Decided to try a experiment. Took out the rear lens group of a broken Tokina FD zoom lens and stuck it backwards in a FED INDUSTAR-61 55mm F2.8. The idea was to use the backwards lens group as a focal reducer. Changing the FED to a wider lens and giving me a faster f stop.
It works but the IQ derogation is extreme. Still a lot of fun to use. I made a quick 20 sec vid with it.