My collection of Vintage lenses so far: 2 Helios (44-2, 44M-6 MC), 1 Pentacon MC, 1 Yashica Yashinon - DS (radioactive), and 1 Fujitar- that one is quite rare. Every lens has
Helios 44 / Stunning video with a radioactive Russian lens / Helios 44-m 58mm f2 / Sony A7 cinematic - YouTube
Are Vintage Lenses Radioactive? - A Scientific Test - YouTube