3 ms·
Some photographic lenses have throrium[1] glass. Even though it is mildly radioactive, it's pretty safe to use. [1] https://en.wikipedia.org/wiki/Thoriated_gla
by timw4mail 6y ago
Some photographic lenses have throrium[1] glass. Even though it is mildly radioactive, it's pretty safe to use.
[1] https://en.wikipedia.org/wiki/Thoriated_glass https://en.wikipedia.org/wiki/Thoriated_glass
- lm28469 6y agoSome viewfinder are made with thoriated glass too, which is much more problematic because they blast alpha rays straight to your eye while in use. Lenses, as you pointed, are safe: http://www.diva-portal.org/smash/get/diva2:652338/FULLTEXT01.pdf http://www.diva-portal.org/smash/get/diva2:652338/FULLTEXT01... I'd avoid dropping/breaking one indoor though.
- timw4mail 6y agoWhich cameras had thoriated glass for their viewfinders?