Posts Tagged ‘Geiger counter’:

2014-12-11 More Geiger Counter Sources

After my first feeble attempts to find a source of radioactivity to test my Geiger Counter, I took one of Paul’s ideas and tested several old 35mm camera lenses.  I tried a very old Asahi SLR (before Pentax) but I got no radiation.  Then I tested 2 Canon EOS cheap lightweight plastic lenses, still nothing. 

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