Great article, Mike. I've been sharing it with my friends.
A quick suggestion - do you think it might be a good idea to warn people against shooting or looking at the sun naively using photographic Neutral Density filters as a precaution?
I've noticed that many ND filters don't block anywhere near what an ND5 or even ND3.8 white light solar filter does, and furthermore the UV transmittance of some photography ND filters is disturbingly high... could be a recipe for eye damage.
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