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Radioactive Lenses Part 1. Get this lens out of the house!

I recently bought a Geiger Muller Counter. This is what happened when I first used it to test a couple of lenses... The first part of a short series of videos where I'll be testing a variety of old lenses for radioactivity. By the way, the counter in the video detects the following radiation: Beta, Gamma and X-Ray . I.e. not Alpha. I'll cover more of the science in a later video.