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Shiny side out. (due better control of stray reflections)
As for the band-pass..... aye carumba.... RGB AstroDon's, apart from the price tag, really don't do any better (Helmholtz figured this out long ago....), you are simply swapping saturation for an easy exposure time...
Baaders have nice hard coatings with excellent longevity.
That said Don's NB filters are excellent too.
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