DSS results are TERRIBLE - Can you help?

swag72 · 17th of December 2010 (Fri)

I spent all of yesterday running my Orion nebula subs through DSS. It has been a nightmare and I don't know if anyone can shed any light on what I'm doing wrong.

I used 16 bit tiffs - about 60 of them at varying exposure times - and darks for the same exposure times. I didn't use flats. I followed the tutorial by a.s.i.g.n on this site. The results?

The histogram came out so far to the right, there was nothing I could do to bring it back and maintain any nebula detail at all. I also had TERRIBLE vignetting - When I looked at an individual sub and pushed the curves up to look, the vignette was not bad at all. In the end result it covers most of the frame.

So I am now putting my raw date through - see how that goes. This is the 2nd time I have used DSS, I used it for M45 a couple of days ago and it went well, I have done nothing different. If only the histogram more to the left to start with I am sure I could go from there.

I would be so grateful if anyone could offer some ideas!

17th of December 2010 (Fri)	#1
swag72 Member Join Date: Nov 2008 Location: Olocau, Spain Posts: 465 IMAGE EDITING OK	DSS results are TERRIBLE - Can you help? I spent all of yesterday running my Orion nebula subs through DSS. It has been a nightmare and I don't know if anyone can shed any light on what I'm doing wrong. I used 16 bit tiffs - about 60 of them at varying exposure times - and darks for the same exposure times. I didn't use flats. I followed the tutorial by a.s.i.g.n on this site. The results? The histogram came out so far to the right, there was nothing I could do to bring it back and maintain any nebula detail at all. I also had TERRIBLE vignetting - When I looked at an individual sub and pushed the curves up to look, the vignette was not bad at all. In the end result it covers most of the frame. So I am now putting my raw date through - see how that goes. This is the 2nd time I have used DSS, I used it for M45 a couple of days ago and it went well, I have done nothing different. If only the histogram more to the left to start with I am sure I could go from there. I would be so grateful if anyone could offer some ideas! __________________ Catch my pictures on Flickr http://www.flickr.com/photos/swag72/

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