[Daveskywill (David)]

Hi: In my earlier 2 shots of the Veil-those were taken in the past using my Celestron RASA and my Nikon D800...but that same older setup is used in this shot too of the Horsehead Nebula this time.

So I was wondering since I plan to use this same RASA scope in my image train in my future shooting setup for deep-sky...and I'm wondering, why in this shot, I've got:

1. 2 purple halo's (equalateral triangular)
2. A serious Unflat fielding problem...that even has 5 different shifts between light to dark to, etc...
3. And a false of bit of rainbow to the star to the south in the image...see?

If I can train-out all the anomalies in this Celestron RASA I'll be happy!

Thanks.
David