I thought I was getting a good start on my Heart Nebula last night with almost 6.5 hours of Halpha. Focus is still a bit of an issue through the night, as I'm using ASIAIR to collect images, which still doesn't have autofocus capability. So it's a Bahtinov mask at the start of the session, and then let it run. But weather, time, etc seemed to cooperate.
This morning, I see at some point the gain for my ASI1600MM got switched from unity at 139, to 0 for this image run. I'm pretty new to this whole AP thing. I have seen many people are doing LRGB at 0 gain, but NB is recommended at 139. Probably for a number of reasons, but the most common I've seen is to reduce posterization.
So, two questions:
1. Should I dump all the data at 0 gain and start over? As a quick stretch and stack, it doesn't look terrible to my eye. This is a link to the final stack if anyone is so inclined to take a look and tell me if it looks terrible or not ( https://drive.google...iew?usp=sharing ). This is a stack of lights only. I had all the calibration files for unity gain. But I don't have any at 0 gain. So if it shows some hope, I'll have to acquire those and restack.
2. If I keep this Halpha, there's no reason I couldn't go back to unity gain for OIII and SII, correct?
I appreciate any input. Unfortunately I don't know that my eye is good enough yet to say "this is bad data". And while I'd rather not lose a whole night of imaging, I'd rather know now than after 2 more nights.