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is The X-Fujinon 50mm f/1.9 FM RADIOACTIVE ?
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PostPosted: Tue Jul 23, 2019 5:43 pm    Post subject: is The X-Fujinon 50mm f/1.9 FM RADIOACTIVE ? Reply with quote

I'm just wondering if The X-Fujinon 50mm f/1.9 FM has thorium in it? And is it dangerous if I use it on my mirorless sony camera?
The lens was produced in the time between 1980-1985. So i'm not sure if it's thorium free or not.
Thanks in advance!


PostPosted: Fri Nov 15, 2019 10:46 pm    Post subject: Reply with quote

Even if it were produced with thoriated glass, which most probably it was not, being slower than 1.4, it would make not a whit of difference unless you used it as an eyepiece for six hours a day for a decade. I have a bunch of radioactive lenses, and using them is harmless.