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Thought I'd list out my step-by-step processing workflow. Maybe some people can learn something,

and some people can teach me something at the same time.

I shot 4.5 hours of !" #$%. "alibrated and stacked with darks, flats, and offsets in &. a(ed as

%)-bit TI** with +mbed adustments+ setting.

This is what it looked like upon opening in hotoshop/

*irst step was to select four points using the color picker tool.

oint

%. % was what I e0pected1wanted to be completely white.

2. oint 2 was what I e0pected1wanted to be completely black.

3. oint 3 was one spot I wanted to keep my eye on - the dust lane in the center.

4. oint 4 was one spot I wanted to keep my eye on - the glow from the gala0y's disk.

ooking at point % supposed to be white6, I noticed that the color (alues were not at 255, 255, 255.

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o using a e(els adustment layer, I mo(ed the white point for each of the 7, !, 8 channels to get

point % to 255, 255, 255.

e0t, I needed to adust the mid-tones. o I added a "ur(es adustment layer, where I pulled thecur(es a little left of the midpoint up input #9, output 2556. I chose these (alues by two criteria/ %6

what looked good in terms of lightening the image to see more detail, but 26 still kept all points

e0cept for point %6 at less than 255, 255, 255. If any of points 2, 3, or 4 hit 255, 255, 255, then that

would mean that I'd mo(ed the cur(e too much and would need to back down.

&epending on how much the "ur(es adustment worked, I will often do another e(els adustment

and mo(e only the gray point to lighten the mid-tones further. 8ut in this case, the "ur(esadustment did enough, so I didn't do any more e(els for the mid-tones.

ow the image shows a lot of the faint detail, but e(erything is light and little contrast. o I added

another e(els adustment layer. My goal was to darken the background to add contrast. o I picked

the black point eye-dropper in the e(els dialog bo0 in lower right6 and clicked on a part of the

image that I wanted to represent the black point dark area in lower right in this case6. This

automatically adusts the black points in the 7!8 channels to set that point to 9,9,9.

This darkened the background, but the gala0y details are still (ery dim. o using the same e(els

dialog bo0, this time I picked the white point eye-dropper and clicked on a point in the image that I

wanted to be white. I picked a point right on the edge of the bright star ust on the edge of the

gala0y's disk left of center6. "licking in the middle of the star would not ha(e made any difference,

since that point is already fully white. This step takes some trial and error to get the right look.

:gain, I kept one eye on the color (alues of the three points 2, 3, 46 to make sure they didn't turn to

all white 255, 255, 2556.

:t this point, the image is looking pretty close to a final (ersion. ;owe(er, there is still a lot of

noise. My ne0t step is to do some noise reduction. Instead of reducing the noise of the final image

with all the abo(e adustments, I want to make the 7 adustment at the most basic le(el, i.e. the

raw image before any adustments. ince I'(e made all the abo(e adustments using adustment

layers, I still ha(e the original raw image. o I select that background layer and apply oise ina

using auto-profile settings6. This smooths out the image a lot.

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ast step is to apply the ocal "ontrast nhancement adustment from "arboni's :stronomy

:ctions. This adds a bit more contrast darkens the dust lane6.

That was it. In this case, I didn't need to do any selecti(e adustments or layer masks, but it would

be pretty easy to do since adustment layers automatically allow the application of masks.

;ere's a comparison of the image from when I opened it to when I finished it/

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:nd this is the final image/

:ny comments, criti<ues, <uestions welcome.