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Narrowband Filters - 12nm or 6nm
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26-05-2015, 11:51 AM
rustigsmed
(Russell)
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Join Date: Mar 2012
Location: Mornington Peninsula, Australia
Posts: 3,955
how about going half way? Baader have theirs at Ha 7nm, Oiii 8.5 and S2 8?
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