Ray Gralak's Sigma

Same data, except I used Ray Gralak’s sigma to process the subexposures. The earlier image was with astroart processing the subs. The improvement I believe is primarily because I handled photoshop better when adding the RGB frames to the luminance and not because of Sigma, although, the data I have has enough flaws in it for Sigma to make any significant difference. I feel Sigma is a surgeons instrument, while my skill level at this point in collecting the raw data is akin to that of a butcher :)