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Just to clarify my understanding of those articles above because I am only interested in (SLR) photography at the moment - he mentions that broadband "light-pollution" (LPR) filters can be somewhat useful for photography of wide star fields where there's skyglow, but narrowband "nebula" filters like UHC and OIII are not recommended for photography. He does recommend if you're only going to get one filter, get the UHC, but I'm assuming that's only for visual/observing rather than photography?
So what filters are recommended for photography? At dark sites only? At light polluted sites?
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