Posted by:
Mnemonic
(
)
Date: August 17, 2017 09:05PM
Lethbridge Reprobate Wrote:
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> We'll get about 80% coverage here in southern
> Alberta. I have my welding helmets cleaned and
> ready to watch it.....with my luck it'll be
> cloudy...
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-viewershttps://eclipse2017.nasa.gov/safety