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All Discussions Tagged 'narrowband' (1)
| Discussions | Replies | Latest Activity |
|---|---|---|
Narrowband Filter ChoiceI've been dissatisfied with my Astronomik brand O-3 and S-2 filters because they are too broad (12nm) to provide adequate contrast. More sp… Started by Greg Marshall |
2 |
Feb 1, 2013 Reply by Greg Marshall |
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