I went out with my trusty old #14 welder's glass to take a look at the sun and sure enough no-magnification-just-really-dark-glass-visible sunspot! (You can't really call it naked-eye visible because of the whole brightness thing with the sun...)

Mais il n'y a rien là pour la Science. Editor, New York Review of Wasps.
I went out with my trusty old #14 welder's glass to take a look at the sun and sure enough no-magnification-just-really-dark-glass-visible sunspot! (You can't really call it naked-eye visible because of the whole brightness thing with the sun...)