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Old 14-08-2023, 10:10 PM
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frank777 (Frank)
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Join Date: Nov 2019
Location: Sydney
Posts: 31
Good question, and one that I've also considered since moving to mono imaging a few months ago. I don't know of any resources that list the narrowband characteristics of particular DSOs. However, in response to a similar question posed on Astrobin recently, the top tier (only, unfortunately) now has an advanced search option which can filter searches for "filter type", including narrow band and many other filter types. I immediately upgraded my membership and I've used it a few times to see what others have used on particular targets.

Frank
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