My point is that all of the signal with the detail is actually there with LRGB. The reason that it's blended, as you say, is that there is also undesirable light that's competing with it. That's my point. It's subtle, but I find that, especially with troubleshooting or improving results, it helps me to understand what's actually happening. A good understanding of this is a direct answer - along with the rationale - to the question in the title of this thread.
I don't think anyone has to be convinced that Narrowband affords capabilities that survive moon and skyglow imaging.
However, In dark skies, it really comes down to personal preference.
"undesirable light" to me is gradients - gradients can be diminished by NB imaging but nothing beats dark skies. If the basis of this discussion is dark skies then I think we should speak to the merits of dark skies.
In dark skies, to some people "undesirable light" or "blended light" (reduction of over all color complexity into shades of tri-color) could be the fact that SHO is a tri-color remix and while it creates contrast - it means that it is contrasted in ways that are also limited. Take horsehead for example. It shines so bright in SHO and RGB but i'd say it actually has less "undesirable light" in dark sky RGB than if taken with any NB filter because a lot of the natural color texture is lost when you make it glow hyper red in NB (Ha) and to be honest, I don't really think Ha or even an HaRGB does it justice because you lose out on the blue caverns and bright white clouds and dark nebula dust in contrast with faint wispy glowing red dust..
As far as contrast is concerned, people shoot m42 and do all sorts of things to it to represent that contrast in many different ways. With and without NB. So i'm not sure contrast in itself is the reason to say NB vs Broadband is better than the other outside the obvious fact that NB has benefits with moon/skyglow.
In the end, it's all personal preference.
So do what pleases you
I look at these cameras, sensors, filters, scopes and everything as tools. There is no one best tool to get the job done. Use all of the tools you have and be creative. If all you like is SHO then shoot SHO, if all you want is RGB then shoot RGB - if you want to experiment, test, learn and be creative then use everything at your disposal.
Most importantly. Have fun!
(and i guess tl;dr - the universe really is colorful up there regardless of how you choose to capture and express those colors)
Edited by sn2006gy, 06 December 2020 - 11:59 AM.