Quote:
Originally Posted by alpal
Yes Ivo,
I see what you mean now.
There wasn't enough data for a top pic & it was from
an outer suburb of Melbourne with light pollution.
The transmission curves for the filters is here:
http://i262.photobucket.com/albums/i...RGBfilters.jpg
You can see a large hole between red & green which helps
to knock out the 2 sodium lines from street lamps.
The luminance filter is picking up all the light pollution which doesn't help. |
That's a nice filter set indeed, with good transparency;
97% R
90% G
91% B
Given the light pollution, it may make more sense to shoot just RGB and Ha instead?
Quote:
Your sceond attempt looks a lot better in the center of the nebula
but really needed a vector mask so that it didn't sharpen the less brighter areas.
cheers
Allan
|
It's virtually the same image, with the same amount of decon applied, but with less noise reduction in places. Because there was more detail left over this time around, I suspect it's the very heavy JPEG compression (45% to get it under 200kb) that is killing me here.
