Hello fellow cult member. It's still a nice image even if you feel the need to go back and process again.
What process did you use for blending the data? I was thinking about having a go at this target sometime and noticed that it's essentially Ha+OIII, so that will require some form of channel mapping. Ha in Red, OIII in Green and Blue?
Thank you for your encouragement. Yeah, not very happy at this stage with the result, but need to have a break from it and redo the image in a few days. Balancing colours is one of the things I need to change. In this version it is Ha for Red, about 30% Ha and 70% O3 for green and boosted O3 for blue.
I think I had versions with better ratios for this image but for some reason went with this one.
Looking forward to seeing your image of this nebula
Detail looks good and depth is great, Suavi. The outer shell is showing well. I agree the colour might benefit from a little tweaking. Have a play with the ColorMask script and CurvesTransformation (R/G/B curves or CIELAB a*, b* and L.) You might be able to get where you want without going back to scratch.
Wow looks really good Slawomir. Love that outer shell. I actually don't mind the colours you have ahieved here, but as we all know, personal choice is part of what makes this hobby so rewarding. Well done mate. I look forward to seeing ur finished product
I think I prefer the first image Slawomir. The OIII bubble is well shown and detail. I like the detail in the primary nebula too. Certainly a nice image.
Thank you gents for your feedback. Yes, I definitely prefer the first version; the second one was just for fun and I think I was going mental after spending most of my weekend on this project...
I will probably do a few revisions of this image before I get what I am after. I have been using Paul's and Rick's excellent images of this nebula as a guide and benchmark...
I like the first better. The 2nd looks like a scene from a Sci Fi movie.
I am again amazed at the resolution you have achieved with the 4 inch doublet and 690. I would have sworn that sort of result was from a 180mm APO or a 12 inch RC type scope.
the OIII bubble really stands out nicely, you've nearly got the complete loop!
Cheers
Thank you Russell
I think there is lesser density of surrounding dust "above" the central star, therefore the bubble is significantly fainter in that region.
Quote:
Originally Posted by gregbradley
Great work Slawomir.
I like the first better. The 2nd looks like a scene from a Sci Fi movie.
I am again amazed at the resolution you have achieved with the 4 inch doublet and 690. I would have sworn that sort of result was from a 180mm APO or a 12 inch RC type scope.
Greg.
You made me laugh with reference to Sci Fi - I totally agree!
Thank you Greg for your encouragement - it means a lot to me.
Really good Slawomir. The Oiii halo has come out very well and the detail in the main nebula is very sharp. I guess 21 hours really pays off.
As a total aside about the colour mapping I have a few suggestions you may want to think about if you want to get pseudo RGB. First think about what would happen with normal RGB. The main lines in general emission nebs are Ha, OIII and Hb. The R filter would record Ha, the green filter would record OIII and the blue filter would record a mixture of OIII and Hb. (OIII sits astride the overlap in the G and B filters, so goes into both channels).
So a reasonable map would be
Ha ->R
OIII -> G
Hb+ OIII-> B.
Now for the sneaky bit. Where does the Hb come from? Hb comes from the same regions as Ha, but at about 25-30% weaker. So if you have an Ha image you also have an Hb image. Just for fun try
Ha -> R
OIII -> G
OIII +20% Ha -> B. Edit should be 80%OIII+20%Ha
Experiment with the ratios in the B channel.
Geoff
They are all good Slaw, great detail and structure visible, in a narrowband shot like this any colour palette preferences are going to be just that and quite personal. Anyone who says one particular colour scheme is better than another, is,well... a little too judgmental IMHO, it's all 100% personal taste
It's still a nice image even if you feel the need to go back and process again.
