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Old 03-07-2018, 10:59 AM
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strongmanmike (Michael)
Woohoo it's clear

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 14,379
If you wish to image galaxies or anything dusty ie reflection nebulae and image them in colour....you will certainly need RGB filters, as both are essentially invisible in NB filters. Star clusters, both open and globular, also look a lot better in RGB too . If however you are happy to be restricted to imaging emission nebulae only, then yes, you can do this with narrowband emission line filters alone.

Mike
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