04-30-2022, 07:30 AM
(04-25-2022, 01:18 PM)Klaus Wrote: I'm currently discovering the wonderful world of radioactive lenses LOL
https://www.robertallenkautzphoto.com/radioactivelenses
Radioactive lenses tend to develop yellow tint with aging, so I don't know how reliable the finding would be
Your link states that putting the lenses in the sun should clear this issue but I am not sure about it
![[Image: Yellowing_of_thorium_lenses.jpg]](https://upload.wikimedia.org/wikipedia/commons/4/48/Yellowing_of_thorium_lenses.jpg)