12 Mar
2003
12 Mar
'03
6:37 p.m.
Greg Taylor wrote:
I just picked up some #13 Welder's glass. The spot is very easily seen naked eye. I need to get a solar filter for one of my scopes.
I don't know that a #13 is safe. #14 is the only one I've heard is safe. http://sunearth.gsfc.nasa.gov/eclipse/SEhelp/eclipsePhoto.html#Safety Patrick