Old data, brand new processing, lens at F:4. Drizzle integrated stack with the same underlying processing stretch and methodology as the corresponding Sadir region image shown here:
http://www.astrobin.com/274532/B/?nc=userThis is a hybrid stack of the full image and its star-reduced version, leaving all the stars in place but allowing the nebular features to stand out a bit better.
The Canon 6D sensor is obviously not as red saturating as most CCD's seem to be. On the other hand, I think the bright red so frequently seen is a mistake. The H-beta line adds in with the H-alpha to produce a lighter salmon color. At the same time, I'm not too sure about that yellowish hue shown here. Yet, without extreme bending of the palette, I cannot get that yellow central region to become more red...
It is also quite evident, by comparing the right and left half of this image, that there is a dust cloud overlaying the region to the left. The apparent lack of contrast would be just as you'd expect when looking at a scene through smoke and dust. That stands in addition to the darker color. So I guess I' saying that the darker left half and the reduced contrast are consistent.
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Rev B: After the mosaic experience, I re-did the colors a bit on this one to remove the yellow tinge in the nebula. After only 1 hour at F:4 there are so few red photons arriving from the nebula central regions that it competes for attention with sky noise which is mostly green. Red + Green = Yellow. So remove some of that green to restore the expected light pink.
But we have to protect the background levels and the stars, which have already contributed their understanding to the color calibration. We know that Green is roughly correct at those extreme levels. So I created a mask = Lum - Starmask, before depressing the G channel at low-mid levels.
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