Re:An Eclipse Chaser’s Guide to Your First Eclipse
by Florin_Andrei on Wednesday August 16, 2017 @04:14PM
(#15030933)
Those are #10 welding glasses, quite bright.
If you use #14 or even #13, there's no need to stack them with anything. They are sufficiently dark on their own. #14 are even ISO 12312-2 compliant for the purpose of eclipse viewing.
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Buy welding googles like these: ($5.29) https://www.harborfreight.com/2-piece-welding-goggles-set-35...
And combine that with a real pressed CD. NOT a recordable CD!! It must be a real, aluminum colored, CD! (And one without a label.)
I did this to look at the transit of venus over the sun a while back. Worked fine, but my viewing time was limited.
However I must add that they advise against doing this, not because it's inherently unsafe, but because if you mess up (for example the CD has a scratch) you can hurt yourself, so......