A useful article

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Bob Yoesle
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A useful article

Post by Bob Yoesle » Thu Oct 08, 2015 4:29 pm

Doing a bit of research and came across this article that has a number of useful formulas and descriptions of H alpha filters system configurations, as well as safety and exposure levels for UV and IR:


Might be good to place in the Library...
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Re: A useful article

Post by marktownley » Thu Oct 08, 2015 4:37 pm

Interesting article, thanks Bob, it's in the library now.
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