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Posted

They keep saying in the media that you need to buy those special eclipse glasses to view the eclipse without damaging your eyes.  Couldn't I just put on my welding visor?

 

 

How to View the 2017 Solar Eclipse Safely @NASA

...Viewing with Protection -- Experts suggests that one widely available filter for safe solar viewing is welders glass of sufficiently high number. The only ones that are safe for direct viewing of the Sun with your eyes are those of Shade 12 or higher. These are much darker than the filters used for most kinds of welding. If you have an old welder's helmet around the house and are thinking of using it to view the Sun, make sure you know the filter's shade number. If it's less than 12 (and it probably is), don't even think about using it to look at the Sun. Many people find the Sun too bright even in a Shade 12 filter, and some find the Sun too dim in a Shade 14 filter — but Shade 13 filters are uncommon and can be hard to find. The AAS Reputable Vendors of Solar Filters & Viewers page(link is external) doesn't list any suppliers of welder's filters, only suppliers of special-purpose filters made for viewing the Sun.To find out more about eyewear and handheld viewers go to https://eclipse.aas.org/eye-safety/eyewear-viewers(link is external). ...

Posted

Good to know!  Thanks for the link, Turtle!

 

Didn't they used to tell people they could make a box with a hole in it so they could view the shadow of the eclipse?

 

I remember a partial eclipse where I was in a barn with a leaky steel roof, and I could see several shadows of the eclipse without even going outside.

 

Roger dodger. :thumbs_up This post in the eclipse thread has a link from NASA on making a pinhole viewer: >> http://www.scienceforums.com/topic/29840-2017-eclipse/?p=349909

Posted

Another mechanism I've used is that if you have a telescope it makes an *excellent* pinhole viewer because you can focus it precisely on whatever surface you project it on.

 

 

In a way, staring into a computer screen is like staring into an eclipse. It's brilliant and you don't realize the damage until its too late, :phones:

Buffy

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