
July 2nd, 2012, 03:35 PM
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Ignorant Know-It-All
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Join Date: Feb 2011
Location: Pacific Northwest, USA
Posts: 1,959
Real Name: Keith DeeJayK's Gallery
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Quote:
Originally Posted by ryanlogic
radioactive?????
0.o
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Yeah, some old lenses including the Takuamar 50/1.4 contained Thorium, which is a radioactive element. There is much debate as to the potential risk in using these lenses, though I tend to come down on the side that thinks the risk is minimal. You may notice that the radiation can cause of yellowing of the lens over time, which can be remedied by exposing the lens to UV light (e.g. sunlight).
You can find more discussion about this lens and the radioactivity in this thread.
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