I'd wanted to talk about this subject on the channel for a while, but to make a cool video I wanted to prove they're radioactive. Finally, with the help of K&F Concept, I managed to use the so-called radioactive lenses, and I confess the result surprised me!
Link to purchase the M39-Z adapter: https://br.kentfaith.com/KF06.389?utm...
Link to purchase the M42-Z adapter: https://br.kentfaith.com/KF06.375_m42...