Very good image Paul. I used registar to make an image coinciding exactly with yours from a Spitzer IR image that shows the dark dust clouds. Can you see the correlation. This should give you a better idea of what is going on. All the dust columns point to Eta Carina.
I also used registar to make an image of the full Spitzer image against one of my Carina images done with the 100ED.
Every time I see one of your images it makes me think about building a 12" Newt astrograph.
Bert
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