This is a 2 x 1 mosaic I've been working on in Ha for Auriga including IC405/IC410 and Simeis 147:
I've been mainly dealing with blending the two frames together so they appear seamless.
I think I have that mostly licked.
Now I've been working on bring out the nebulosity and part of that process for me has always been to de-emphasize the stars.
In this case it was tricky because with my Canon 100mm lens/ASI1600MM setup I have tilt and so stars look great on half the frame and not so good in the other side - mostly the corner.
I have treated this so far by the standard method of reducing star sizes. To handle the "bad side" I layered several additional star reduction layers which I masked to only treat the problem areas.
As a result I like the general balance of stars to nebula but if you pixel peep you will be blinded by the small scale disaster area left behind!
I suspect I need to work on further de-emphasizing the sea of smaller stars that remain. I'm usually not a fan of starless images but maybe I need to go that far for this subject.
I'm mostly satisfied with the result but would appreciate any feedback from fresh sets of eyes.
Edited by mikefulb, 09 February 2018 - 10:53 PM.