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I know this is after the fact, but you can go to NASA website--they have a list of the companies that have their approval for eclipse-safe equipment. Celestron is on that list.
Sorry, there was a problem. Please try again later.Every official Celestron eclipse filter product website, such as the one in the following link, clearly states the products are fully ISO compliant. https://www.celestron.com/products/eclipsmart-solar-eclipse-glasses-observing-kit
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