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First attempt at NGC 6888 using only LRGB subs


SlimPaling

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Hi ..

I have managed to get my first attempt at NGC 6888 ... 9x300sec CLS subs and 5x300sec RGB subs.

Since reading up about this object I understand that it is pretty faint and really needs Ha subs to help bring out detail ..... I do have an HA filter on my wheel .... but the trouble is that I don't know how to combine Ha with my LRGB subs :-((((

Can anybody point me to where I can find out how to do this???

Cheers Mike

NGC 6888 Cropped.jpg

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Hi ... many thanks for your suggestions .... I am currently looking into them and trying to understand how they are carried out. I am using Photoshop as I am finding PixInsight too complicated at the moment.

I am hoping to get some Ha subs and a few more CLS subs to add to my current set .... when the weather allows !!!

Cheers Mike

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The background seems to be neutral in the image. In reality, the whole area is a bit red. If you have automically set a black point anywhere in the image, then you will get lose a lot of the red detail in the Crescent itself.

If you look at the Red stack, do you see more detail than you see in the colour version?

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1 hour ago, don4l said:

The background seems to be neutral in the image. In reality, the whole area is a bit red. If you have automically set a black point anywhere in the image, then you will get lose a lot of the red detail in the Crescent itself.

If you look at the Red stack, do you see more detail than you see in the colour version?

Yes ... I agree that there is a definite red cast in my image.

This has been the most difficult nebula that I have imaged so far. The red stack showed very little real detail and I probably over did the amount of red to try to bring out the colour sufficiently. Plus the fact that when I added the Lum stack on top of the RGB layer the colour was initially a pale salmon colour which I have never seen before comparing results with other nebulae that I have processed before ? Not 100% sure why this should be so. I had to adjust the level of red even more to compensate and make the reds stand out better.

I am new to all of this and still have a looong way to go before I get things right!!! A great deal of reading and trial&error to be done!

Cheers Mike

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