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Narrow Band Filters for visual
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21-02-2020, 09:04 AM
gaseous
(Patrick)
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Join Date: May 2016
Location: Brisbane
Posts: 782
I can second what John has said, despite having a lifetime's less observing expertise than him. The DGM NPB is my most-used filter, and doesn't give the same greenish tinge to all the stars that most straight OIII filters do.
gaseous
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