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11-21-2018, 10:02 AM   #31
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QuoteOriginally posted by tm64 Quote
@reh321

very interesting pics thx for showing us
if u put the "yellow" lens under UV-Light (or sunlight) for some days it will fix the problem for most lenses
Yes, that is why I did it.

My point was that you don't have to do that with 'M' lenses, which is another assurance that they aren't "radioactive".

11-23-2018, 04:38 PM   #32
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As an aside did you know that your smartphone is also a cosmic ray detector? This site has details of a citizen science project CRAYFIS: The app that turns your phone into a cosmic ray detector.
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