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Thorium Oxide Lenses
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<blockquote data-quote="Bikerbrent" data-source="post: 744787" data-attributes="member: 42081"><p>This is from <a href="https://www.diyphotography.net/can-radioactive-lenses-harmful-health/" target="_blank">https://www.diyphotography.net/can-radioactive-lenses-harmful-health/</a></p><p></p><p>Okay, time to get serious. A radioactive lens containing Thorium emits around 0.01 <a href="https://en.wikipedia.org/wiki/Roentgen_equivalent_man" target="_blank">mrem</a>/hr. For comparison, a chest X-ray emits 10 mrem, and none of us died from it. According to <a href="https://www.nrc.gov/about-nrc/radiation/around-us/doses-daily-lives.html" target="_blank">Nuclear Regulatory Commission</a>, Americans on average receive 620 mrem each year. So, even if you had your Thorium lens with you at all times (and I assume you’re not that attached to it), you’d receive a yearly dose of 87.6 mrem from it.</p><p></p><p></p><p> In conclusion – no, you can’t get sick or die from radioactive lenses. You’d have to spend months in a room filled with 2 million of them in order to feel any consequences, and I believe no one’s collection is <em>that</em> big. So, if you have a couple of good ones, don’t be afraid to use them.</p></blockquote><p></p>
[QUOTE="Bikerbrent, post: 744787, member: 42081"] This is from [url]https://www.diyphotography.net/can-radioactive-lenses-harmful-health/[/url] Okay, time to get serious. A radioactive lens containing Thorium emits around 0.01 [URL="https://en.wikipedia.org/wiki/Roentgen_equivalent_man"]mrem[/URL]/hr. For comparison, a chest X-ray emits 10 mrem, and none of us died from it. According to [URL="https://www.nrc.gov/about-nrc/radiation/around-us/doses-daily-lives.html"]Nuclear Regulatory Commission[/URL], Americans on average receive 620 mrem each year. So, even if you had your Thorium lens with you at all times (and I assume you’re not that attached to it), you’d receive a yearly dose of 87.6 mrem from it. In conclusion – no, you can’t get sick or die from radioactive lenses. You’d have to spend months in a room filled with 2 million of them in order to feel any consequences, and I believe no one’s collection is [I]that[/I] big. So, if you have a couple of good ones, don’t be afraid to use them. [/QUOTE]
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