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though maybe now it's more comprehensive than is useful.
The only important thing is that you want them to be ISO tested and certified for solar viewing. The scary thing is, with all the hubbub and one-time purchases, there are a LOT of glasses out there with fraudulent ISO labels on them, even at reputable places like Amazon. That doesn't necessarily mean they're dangerous, just that they're not as carefully made and could be dangerous.
The ones I got are from Lunt Solar Systems. They're just the cheap paper things, but Lunt is an extremely reputable company. They normally do their business in solar telescopes, which would basically just melt if the filters weren't up to snuff. So they know what they're doing. I got a ten pack from Amazon for like fifteen bucks.
This was a week or two after I paid more for a three pack of nicer-looking plastic ones, also from Amazon. They look less nerdy (as if that matters when you're surrounded by a thousand other nerds staring directly at the sun) and CLAIM an ISO certification, but they came from a no-name Chinese manufacturer and just generally set off alarm bells to me.
The no-name Chinese ones seem to work, but I get a better image in the Lunt ones. Also, this could just be in my mind, but I felt like I got a headache more rapidly with the no-name ones than with the Lunt paper ones, even though they didn't seem significantly brighter. You can't really tell by eye how bright they are outside of the visible band, so I decided better safe than sorry and threw out the plastic ones.
Long story short, I'm happy with the paper ones from Lunt, but I'd trust anything listed on the AAS site. They know what they're talking about.
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