We finally had a clear night up here in Brisbane and I got a chance to plug in the Badder HA filter I bought in October
I think something is wrong, either in the way I use it or in the filter itself. I've attached the raw red file out of the camera and the PS converted greyscale file. This is a 6 stack of 20 minute subs @ iso 400, flats/bias/darks applied.
Why has the grey image lost detail and gained noise? The original image showed blue and green in the Hystogram and I didn't expect that either. However this is my first HA shot which I was going to mix with RGB data.