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NB filter choices?
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03-01-2023, 04:50 PM
Bassnut
(Fred)
Narrowfield rules!
Join Date: Nov 2006
Location: Torquay
Posts: 5,064
in bortle 4.5 skies, 3nm will offer more contrast, which might matter in your case, more pop..
For Ha though, a 5-7nm filter might be preferable, it will pass NII, which for many objects will give more signal.
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