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Originally Posted by multiweb
Totally agree with all that you say above Doug. I like your colours too. At the end of the day that's what the processing is about. Making a visually pleasing image. What I've always been wondering is what the "original colours" should look like. As Peter Ward posted once, we don't want to shoot in broad day light and found out that people have green skin tones. Then you know that the RGB ratios 1:1:1 are wrong. I wonder what ratios other QHY8 users use when doing RGB.
Regarding the QHY8 I know that it has twice as many green pixels as the two other channels. So what ratios would you use? Also have you found that shots around the Tarantula always seem to be noisier than other areas of the sky? Is this because there are so many stars in the area?
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I Think the real reason for apparent noise when imaging in the Tarantula area is probably a combination of a couple of things.
1. The area is an area very rich in nebulosity and dust and we are probably, with long exposures picking up a lot of the fine dust areas which appear as noise.
2. The area being fairly close to the SCP makes guiding a little more dificult than other parts of the sky and we may well be suffering a little from image drift in some of these faint areas. You may or may not have noticed the dificulty gaining a calibration with programs such as PHD in this general area.
As for debayering ratio's, I use images plus and debayer at generic RGB and then do all manipulation in CS3 which allows me to manipulate colour and saturation to my own taste.
Colour balance and image saturation is an interesting topic which is dificult to really contemplate. The images we see are still entirely the final result of our own expectations. Some scientific basis must exist as to the colours used and final levels but I personally have no idea about this scientific data and generally develope an image to be pleasing to myself and usually based on other images of the same target.
WHO KNOWS. This would make an interesting discussion thread.