General > General Technical Chat
Eclipse watchers in America on April 8th.
nctnico:
--- Quote from: jpanhalt on April 07, 2024, 12:27:03 pm ---In the US, our "experts" have warned that welding helmets should be avoided, because they are often "not dark enough." Mine happen to be shade 11 for small electrodes and less than 250A; the experts say at least a 12 is needed. My store-bought eclipse glasses are a little darker than my helmets are.
--- End quote ---
Interesting. Because the sun gets covered during an eclipse, most of the bright light is also gone.
Bud:
I made this pinhole telescope contraption out of a 3 feet plumbing pipe and couple juice cups, tested it yesterday in sunny weather hiding behind the patio umbrella and sticking this thing out, LoL. the sun image projected onto the screen made of piece of milky plastic was about 3/8 in diameter and quite sharp. But today it is heavily cloudy in Toronto, likely cant use it which is a shame.
rsjsouza:
I am in the Dallas area and will get it quite nicely at around 1:40PM today. Unfortunately the sky is overcast with a very thin layer of clouds, which I hope it will dissipate or at least have a break by the time of the Eclipse.
soldar:
--- Quote from: jpanhalt on April 07, 2024, 12:27:03 pm --- In the US, our "experts" have warned that welding helmets should be avoided, because they are often "not dark enough." Mine happen to be shade 11 for small electrodes and less than 250A; the experts say at least a 12 is needed. My store-bought eclipse glasses are a little darker than my helmets are.
--- End quote ---
Half the time "experts" are self appointed and know little or nothing. Then whatever they say is reported by some reporter who knows and understands nothing on the topic. Then the school principal reads it and tells the teachers to get the kids ready. And with this exercise of telegram the teachers end up telling the students something which makes no sense. "Tomorrow an unusual event will take place. If it is overcast you will form in the gym where the PE teacher will eclipse the Principal."
I have seen eclipses with welding glasses or lenses or shades and they were perfect. But, of course, they come in different grades and some may be too light and some may be too dark which makes such a general statement meaningless. If a bit too light it is easy enough to wear sunglasses.
My relatives in Dallas bought the shades from Amazon and report they find them a bit too dark and they liked the welding lens better.
On the other hand they just reported it is overcast there so the entire exercise might be moot if it does not clear up soon.
My 13 year old nephew needed his parents to sign an authorization to see the eclipse at school (!) and it seems some parents do not want their kids to view the eclipse in the yard and they will get to watch it on TV.
Being overcast it seems they will ALL get to see it on TV and without need for special shades or authorization.
soldar:
--- Quote from: nctnico on April 08, 2024, 03:04:02 pm ---
--- Quote from: jpanhalt on April 07, 2024, 12:27:03 pm ---In the US, our "experts" have warned that welding helmets should be avoided, because they are often "not dark enough." Mine happen to be shade 11 for small electrodes and less than 250A; the experts say at least a 12 is needed. My store-bought eclipse glasses are a little darker than my helmets are.
--- End quote ---
Interesting. Because the sun gets covered during an eclipse, most of the bright light is also gone.
--- End quote ---
It is extremely dangerous to look at the sun even if partially covered.
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