4 ms·
I thought common knowledge. Some old lens used radioactive elements. But I was under the impression the glass protect quite a bit of it.
by ngcc_hk 7y ago
I thought common knowledge. Some old lens used radioactive elements. But I was under the impression the glass protect quite a bit of it.
- anticodon 7y agoI've read that good isotopes emitting alpha and beta are slowly decaying and transforming into isotopes emitting gamma radiation. This is why old lenses can become dangerous after 40-50 years.