Just taking the opportunity to ask you as one of the resident APP experts, because there seem to be alternatives with APP and with duoband filters. I started APP for OSC only, learned to add Ha and then really wasn't sure what to do for the best when processing L-Extreme images.
I haven't used the L-Extreme since the spring as I had a clouded over summer followed by planetary boot camp. A mono camera and SHO filters is definitely in my future.
I can tell you what I do with a 2600MC and my NBZ filter, the equivalent of the LExtreme for fast scopes, like my C8 RASA. I process the data as I would RGB from the OSC camera. I split nothing. I color balance as I would with RGB.
Here's the result. Bortle 7 skies, dim target. Acquisition data here, click on it to enlarge, for better detail.
Yes there are alternatives. When I can do images like that, it's not worth my time to mess around with them. That image used all the photons. My default is always standard practice, it's hard enough to make that work.
The one thing I could have done was split the luminance data from the color data, and process the color differently, then recombine. You can be more aggressive with noise reduction on the color, if it's a bit blurry the luminance will sharpen it up. EXCEPT...
I use PixInsight. Some of its noise reduction tools let you apply them separately to luminance and color within one overall application. So, no need to split them manually, PI does it automatically.
Edited by bobzeq25, 20 September 2021 - 12:59 AM.