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I just tried out a DGM NPB nebula filter tonight. It loses only a small amount of the nebula light but cuts the stars way back. Made the biggest difference on Eta Carina, where the shape of the nebula became very well defined (because it cuts the Milky Way out). Also of some interest on Tarantula. On M42 I found it of no benefit. How do these nebulae look on a 6" scope? I have dark skies and 12" scope and still wouldn't call Tarantula a bright object. I need five minutes of dark adapting to properly appreciate it.
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