@wxcafe@social.wxcafe.net what did they put in the glass?

@confusedcharlot @wxcafe@social.wxcafe.net ah, there's also leaded glass, so maybe that

@confusedcharlot @wxcafe@social.wxcafe.net uranium glass glows under UV light so that wouldn't be great for a lens

@confusedcharlot @wxcafe@social.wxcafe.net lead crystal has higher refractive properties than regular glass so I bet it's great in cameras en.wikipedia.org/wiki/Lead_gla

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@noiob @wxcafe@social.wxcafe.net it could be lanthanum too. it's more abundant than lead

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