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Old 25-11-2013, 01:23 PM
malau (David)
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Processing DSO in DSS..

Hi, Finally I tried some DSO photography last Sat and I have few questions about processing these photos.

Camera:
600D, 3200 ISO, Raw

Telescope:
150/750m no guide

I cant remember what I took (there is a nice guy help me to point my scope to somewhere interesting). I can see there is some gas cloud color near the stars.

I used DSS to stack (4-6pics), the result is good except the image is totally green after that. Just wonder what should I do about it? I also have photoshop can use ..

The pic below I did some modification in DSS before export to tiff..

http://img27.imageshack.us/img27/6194/0wv5.jpg
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Old 25-11-2013, 05:27 PM
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LightningNZ (Cam)
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I'm thinking that'd be the Orion Nebula. That is indeed pretty green. You'd be better off putting it through DSS again. Just make all the RGB curves line up on top of each other then save it. You can then pull up the fainter stuff a bit in PhotoShop.

Hope this helps,
Cam
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Old 25-11-2013, 07:01 PM
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I have had this happen to me a couple of times too.... Moonlight maybe? (Just guessing)
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Old 25-11-2013, 09:08 PM
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lazjen (Chris)
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If you're ever wondering what your image is, try astrometry.net.

Here's the results of your image.
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Old 26-11-2013, 12:28 PM
malau (David)
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Quote:
Originally Posted by lazjen View Post
If you're ever wondering what your image is, try astrometry.net.

Here's the results of your image.

Thank you
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Old 26-11-2013, 12:29 PM
malau (David)
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Quote:
Originally Posted by LightningNZ View Post
I'm thinking that'd be the Orion Nebula. That is indeed pretty green. You'd be better off putting it through DSS again. Just make all the RGB curves line up on top of each other then save it. You can then pull up the fainter stuff a bit in PhotoShop.

Hope this helps,
Cam
Thanks. Testing now your method works. How I have to play with photoshop
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Old 26-11-2013, 03:35 PM
malau (David)
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Thanks everyone for your help. I managed to do a bit..
http://img9.imageshack.us/img9/4017/31u3.jpg

My first attempt... my next step is if I can bring the true color out Thanks for the support
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Old 26-11-2013, 06:40 PM
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LightningNZ (Cam)
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You're welcome David. Looks quite magenta in that repro. Here's what I do with DSS. I stack my images, then adjust the colours so their histogram peaks line up. I then go to the Luminance panel and adjust the histogram so that the line runs through the middle of my histogram peak (half way up the 'spike') I then make sure the highlights tapers to the top right. That should leave it looking fairly "grey" and showing everything from the background to the brightest stars.
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