Quote:
Originally Posted by JohnH
Here is my updated version of the pillars - approx 4.5 hrs of data in total with a second run of Ha data (15 x 10 mins) added as a Luminace layer to the previous Ha,Oiii, Sii data (8 x 5 mins each). Scope is the ED127, ccd - Opticstar 145m, calibration and stacking in DSS and LRGB processing in AA4.
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it is a mistake to use Halpha for luminance for this sort of image. don't feel bad, most that come from the world of LRGB do this without much consideration: it is a common mistake
you simply attenuate the sulfur and oxygen while strengthening the hydrogen. the hydrogen is already dominant and using it for luminance simply aggravates the problem
here's a short write up that illustrates why this is a bad idea
http://www.narrowbandimaging.com/why...nance_page.htm