My second image with the 2x Powermate setup.
@Gary Imm gave me the inspiration to target this extraordinary couple (
https://www.astrobin.com/ffmpdz/?nc=&nce=), also being a good test to see if at f/14 not as bright targets (as the Leo Triplet (
https://www.astrobin.com/2218db/) or M42(
https://www.astrobin.com/m9238x/H/)) make sense at all.
I have to admit though that processing the data was very challenging. I ended up to use all channels stacked together as Lum, just the L channel was still too noisy and had an awful pattern in it, I have not seen that in any other image so far.
Interesting was also the little test that I added, taking Hα images as well. Wanted to see if the narrowband blocks out too much data, and to my surprise this was not the case. There was almost as much information in the Hα channel as it was in the L channel, not quite clear how I can explain that, but I took it and added those to the "Super Lum".
A nice side effect of the Super Lum: there was no gradient at all in the original stacked image, and as I hoped, the noise level was very low. No DBE and only a minor noise reduction process was done.
The situation for the RGB channels was then worse, could not stack those with others. Adding color to that image without really downgrading the overall quality was tough, hence the final composition is not as "colorful" as I wished it would (and should) be.
* This image was not submitted for IOTD consideration
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