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Solar eclipse glasses question

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#1 astroclint

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Posted 19 June 2017 - 10:32 PM

I got some solar eclipse glasses off of ebay for $5.99 free shipping but I don't know if I can trust them they say they are iso and ce standered viewing the instructions say not to look at the sun for more than 3 minutes.

Should I get the a different brand like a thousand oak's optical.



#2 ed_turco

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Posted 20 June 2017 - 10:59 AM

I still prefer the #14 welders glass I've been peddling.  Right here on CN Classifieds.

 

 

ed



#3 APshooter

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Posted 21 June 2017 - 05:47 PM

Who makes them?  Rainbow Symphony and one other maker (Thousand Oaks?) are reliable sources for them.



#4 Tech Hiker

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Posted 21 June 2017 - 09:13 PM

I'm not sure I would call Rainbow Symphony a reliable source.  I ordered a "Solar Viewer" from them.  Basically a piece of cardboard with a glass solar filter in the center.  What they sent me was just a sheet of plastic film, which I assume is a solar filter.  But it's not marked, so who knows.  I emailed them about it.  No response.


Edited by Tech Hiker, 21 June 2017 - 09:17 PM.


#5 astroclint

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Posted 22 June 2017 - 12:35 PM

This is where I got them from. there's a photo of the sun through the glasses.

http://www.ebay.com/...0gsmeAKx2ChMBSg

 

Nasa Solar Eclipse safety

https://eclipse2017.nasa.gov/safety



#6 astroclint

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Posted 22 June 2017 - 12:49 PM

Just found out walmart is selling the same glasses.

https://www.walmart....7&wl13=&veh=sem



#7 ed_turco

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Posted 22 June 2017 - 01:47 PM

That's what bothers me about eclipse glasses. Now that I don't have any horses in this race (heh-heh), with this aluminumized mylar stuff, who makes the glasses and who does the quality control on this stuff; can you ever find out? It seems that a lot of folks trust these glasses to protect their eyesight. I know I would. I imagine some Chinese factory cranking out millions of these. 99.9999% work fine, but what happens to the poor bloke who gets a poor pair? I'd like to find out; wouldn't you?


Ed

#8 REC

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Posted 23 June 2017 - 10:16 AM

Who makes them?  Rainbow Symphony and one other maker (Thousand Oaks?) are reliable sources for them.

So, I was just showing a friend what types of eclipse glasses you need to wear. So I pulled a pair out of my case and low and behold, they where from Rainbow! I bought them for the 1998 eclipse, so they have been around a while. They work fine.



#9 ed_turco

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Posted 23 June 2017 - 01:28 PM

Whatever your feelings are towards aluminized mylar, I offer this advice.

 

Get a fresh pair of glasses.   Heaven knows what air pollution has done to the ultra thin aluminum coating on that mylar.  I found an old pair of my eclipse glasses, over ten years old, and took a peek.  It had thin spots and pinholes.

 

I care a more about my eyesight than save $10 and trust old glasses.  There are safer alternatives.  One is suggested above.

 

There are others.

 

 

Ed



#10 Bryguy

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Posted 24 June 2017 - 10:19 AM

I use both Rainbow Symphony and Lunt Solar for eclipse glasses.



#11 Matthew Ota

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Posted 24 June 2017 - 12:12 PM

I abhior using the term "aluminized mylar" for solar filter material. It is Baader Planetarium Astrosolar Safety Film. I fear that some yahoo will try to make a solar filter out of an aluminized mylar baloon or a space blanket. They are NOT the same as Baader Astrosolar Safety Film and are NOT safe for use as a solar filter.

 


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#12 hboswell

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Posted 30 June 2017 - 11:55 AM

Just found out walmart is selling the same glasses.

https://www.walmart....7&wl13=&veh=sem

 

Are these made by Rainbow?  I see Bravo Wholesale listed as the distributor.  And has anyone used these over regular glasses?

 

Harry



#13 ed_turco

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Posted 01 July 2017 - 04:01 PM

I abhior using the term "aluminized mylar" for solar filter material. It is Baader Planetarium Astrosolar Safety Film. I fear that some yahoo will try to make a solar filter out of an aluminized mylar baloon or a space blanket. They are NOT the same as Baader Astrosolar Safety Film and are NOT safe for use as a solar filter.

 

I'm sorry but Roger was using this term probably well before you were born.



#14 George9

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Posted 01 July 2017 - 07:25 PM

Just got my Rainbow Symphony glasses today. I worried that they might be out. It took two weeks from order to arrival. They're the black polymer that I like. Certified with the latest regs.

 

The "Plastic Eclipse Shades - Designer Eclipse Glasses" fit over my eyeglasses fine. The cardboard shades work fine, too. I got 25 of those for the group.

 

George



#15 REC

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Posted 02 July 2017 - 09:28 AM

Just got my Rainbow Symphony glasses today. I worried that they might be out. It took two weeks from order to arrival. They're the black polymer that I like. Certified with the latest regs.

 

The "Plastic Eclipse Shades - Designer Eclipse Glasses" fit over my eyeglasses fine. The cardboard shades work fine, too. I got 25 of those for the group.

 

George

They are black and not the standard silver looking? Did you get the Plastic shades to cover your glasses from them to? How much ?



#16 Michael Covington

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Posted 02 July 2017 - 09:48 AM

To the OP's question: I have not heard of anybody getting any eclipse glasses that are not actually safe.  Genuine ones are cheap enough that there is little motive for anybody to counterfeit them.  Also, in looking at the history of eclipse eye injuries, the injuries don't seem to be coming from filters believed to be OK that are slightly out of spec.  The injuries are coming from people not using filters at all, or using filters that are grossly the wrong kind of thing.

 

If something seems to be wrong with your eclipse glasses, by all means replace them, but if you bought them from a reputable company, I wouldn't worry.

I see that you bought them off eBay, which means they aren't from a major vendor.  Who made them?

 

Even so, what I say stands -- there have been no reports of eclipse glasses turning out to be unsafe as far as I can determine.


Edited by MCovington, 02 July 2017 - 09:50 AM.


#17 George9

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Posted 02 July 2017 - 12:11 PM

Yes, they are both black polymer. The cardboard ones are a little shiny in the front but black in the back where it matters. I like the brightness of the sun. And they fit over my glasses, too (depends where you bend them). They were 85 cents each when purchasing 25.

 

The plastic shades fit over my eyeglasses well. They are fully black on both sides (doesn't matter as long as black in the back). They are a little darker than the cardboard ones. Fine to see the sun, but I prefer the brighter. They cost about $20.

 

I also own lots of other filters. I keep a number 12 welding glass in my solar kit. Number 14 is usually recommended but 12 is considered equally safe. The UV and IR are blocked the same amount. The sun is a little too bright for an optimal view but still safe (see Ralph Chou's work). I use them when the sun is near the horizon or dimmed by haze. When the sun is bright, I just tilt them to increase the path and dim the sun. Avoid cheap welder's glass from the Internet. I found it to be really flawed with endless ripples. I bought my good ones from Phillips Safety, which had green Athermal Schott glass from Germany; very high quality.

 

George



#18 REC

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Posted 02 July 2017 - 02:04 PM

Yes, they are both black polymer. The cardboard ones are a little shiny in the front but black in the back where it matters. I like the brightness of the sun. And they fit over my glasses, too (depends where you bend them). They were 85 cents each when purchasing 25.

 

The plastic shades fit over my eyeglasses well. They are fully black on both sides (doesn't matter as long as black in the back). They are a little darker than the cardboard ones. Fine to see the sun, but I prefer the brighter. They cost about $20.

 

I also own lots of other filters. I keep a number 12 welding glass in my solar kit. Number 14 is usually recommended but 12 is considered equally safe. The UV and IR are blocked the same amount. The sun is a little too bright for an optimal view but still safe (see Ralph Chou's work). I use them when the sun is near the horizon or dimmed by haze. When the sun is bright, I just tilt them to increase the path and dim the sun. Avoid cheap welder's glass from the Internet. I found it to be really flawed with endless ripples. I bought my good ones from Phillips Safety, which had green Athermal Schott glass from Germany; very high quality.

 

George

I already have a pair of the cardboard ones, so will try bending them to see how the fit it? The size of my glasses are not that big and the eclipse glasses fit over them pretty well. Just have to make sure they are secure. I just looked at the sun with them, it's a small little ball, thought it would look bigger for some reason. Definatley will be using a scope to watch partial.



#19 ed_turco

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Posted 02 July 2017 - 02:44 PM

Yes, they are both black polymer. The cardboard ones are a little shiny in the front but black in the back where it matters. I like the brightness of the sun. And they fit over my glasses, too (depends where you bend them). They were 85 cents each when purchasing 25.

 

The plastic shades fit over my eyeglasses well. They are fully black on both sides (doesn't matter as long as black in the back). They are a little darker than the cardboard ones. Fine to see the sun, but I prefer the brighter. They cost about $20.

 

I also own lots of other filters. I keep a number 12 welding glass in my solar kit. Number 14 is usually recommended but 12 is considered equally safe. The UV and IR are blocked the same amount. The sun is a little too bright for an optimal view but still safe (see Ralph Chou's work). I use them when the sun is near the horizon or dimmed by haze. When the sun is bright, I just tilt them to increase the path and dim the sun. Avoid cheap welder's glass from the Internet. I found it to be really flawed with endless ripples. I bought my good ones from Phillips Safety, which had green Athermal Schott glass from Germany; very high quality.

 

George

My eye doctor doesn't agree.  He considers #13 welders glass to be a bit iffy.

 

Let's all be careful what we know and what we say.


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#20 George9

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Posted 03 July 2017 - 06:58 AM

It's good to be safe. There is a previous thread on this, but I cannot find it now. Let me first just show my source. Ralph Chou is the eye safety expert used by NASA, the American Astronomical Society (AAS), and Sky and Telescope. He wrote the eye safety section of the new ISO standard, ISO 12312-2, on filters for direct observation of the Sun. Here is his updated document on the AAS Web site https://eclipse.aas....-Eye-Safety.pdf . See the section on welder's filters. When Rainbow Symphony cites a safety standard on their glasses, it is Chou's standard that they are referring to. When we talk about not using Baader film for direct observation any more, that is also Chou's new standard.

 

But that document ends with this advice, "This paper does not constitute medical advice. Readers with questions should contact a qualified eye-care professional." ed_turco has done that, and his qualified eye-care professional feels it should be dimmer, and he could very well be right. The fact that the new standard is more strict than the old standard makes you wonder if the next standard will be even stricter, and if eventually a #12, #13, or even #14 may someday be realized to be unsafe in ways that we cannot guess today. So you need to draw your own conclusions.

 

The reason I carry the #12 is that at least today the ISO standard considers it be safe (whether it is or not), and carrying it definitely increases my safety. When I am trying to position the sun when it is in the clouds or haze or at the horizon, I used to squint or look quickly. The #14 just looked black in those circumstances. Now I can look more safely through the #12.

 

The rule of thumb I learned was not to stare at anything brighter than grass in sunlight. So I would not normally use the #12 straight-through for an overhead sun.

 

For average eclipse-goers, a #14 makes more sense. Frankly, purpose-made eclipse glasses make the most sense to me, and that's why I bought them for the group. At 85 cents each, I could afford them.

 

One thing I do worry about is in places that happen to have partly cloudy skies or very thick haze, naive viewers will not see anything through their eclipse shades and will attempt to see it while squinting or looking quickly. Or worse, use something at hand that dims the sun without blocking ay UV. Squinting and unknown materials are clearly unsafe. Same reason you can get a sunburn on a somewhat cloudy beach day.

 

And let me end with a similar caveat. I am not a solar safety expert. I am showing you the research I have done for my own eyes. You need to do your own.

 

George



#21 astroclint

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Posted 02 August 2017 - 04:11 PM

Just saw this at sky and telescope.

https://eclipse.aas....s/solar-filters

Safe vIiewing everyone tons of info on where to get solar eclipse glasses.



#22 Jim Haley

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Posted 02 August 2017 - 05:11 PM

If you are wondering if your glasses are among the "reputable vendors" or just looking for reputable vendors that are not sold out, see here.  https://eclipse.aas....s/solar-filters  Many more sources then just the few that NASA lists. 



#23 astroclint

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Posted 03 August 2017 - 12:45 PM

I got new eclipse glasses from lowes they are made by american paper optics.


Edited by astroclint, 03 August 2017 - 12:53 PM.

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#24 123Michael321

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Posted 04 August 2017 - 02:07 AM

I have several Rainbow Symphony paper eclipse glasses. They were purchased from a reputable source, and give every indication of being authentic.

 

When I put them on, they do not "cling" to my face. I mean, they're glasses (paper glasses at that), not goggles. So when I put them on, some ambient light leaks in around the edges of the glasses.

 

I'm guessing that this is safe. But since my eyes are kind of valuable to me, I'd appreciate it if you all would reassure me that it's perfectly fine and I can safely look at the sun through these glasses.

 



#25 SteveRosenow

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Posted 04 August 2017 - 02:10 AM

 

Just found out walmart is selling the same glasses.

https://www.walmart....7&wl13=&veh=sem

 

Are these made by Rainbow?  I see Bravo Wholesale listed as the distributor.  And has anyone used these over regular glasses?

 

Harry

 

They are manufactured by American Paper Optics. I work for a Walmart in Washington state and I've been designated their 'Eclipse Specialist'. I have sold at least a thousand of them so far and I bought two dozen pair for myself, my wife, and my family (plus a couple to use as filters for my finder scopes).

I can guarantee they're the same black polymer film material that Thousand Oaks sells under the 'SolarLite' name.

 


Edited by SteveRosenow, 04 August 2017 - 02:12 AM.



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