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I observe under Bortle 7/8 skies in suburban Sydney and Bortle 3 skies rural south coast NSW
My Astronomic UHC filters work extremely well under Bortle 3 skies observing emission nebulas , clusters and galaxies etc... but don’t really help a lot under Bortle 7/8 skies
In most cases UHC and LP visual filters are only as good as your sky conditions allow and sometimes don’t offer an improved view at all
The only filters I use that work in both sky conditions are my planetary and moon filters
Hopefully other visual astronomers can offer some more advice
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