Quote:
Originally Posted by sil
Pic 1 is the best by far. You've killed the star colours in the other shots.
Assuming this is a DSLR capture, i havent done tarantula yet myself but from memory shots i've seen were a bluer nebulosity and i assume those were due to filtered shots and processing (Ha O Si etc).
That coloured region on the left I think is glow, and shouldnt be there. Its like an internal reflection from a cheap lens element. It should be removeable with a gradient removal tool. Alternatively if you can reshoot, try to see if you can rotate your camera/sensor around 180 degrees and see if the region moves and you can combine the two sets of captures to help reduce its prominence if you have no gradient tools.
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Thanks Sil. Yep, it's a modded Canon 60D at prime focus on the telescope. I should probably mention these things.
I looked up gradient removal after reading your post. Is this what you mean -
http://www.rc-astro.com/resources/GradientXTerminator/
Next time I will turn the camera around and see if the glow moves or stays put. It is hard to see though until DSS gets through with it. I've attached an untouched image for you to see - maybe you will see it with the extra experience in looking at astro images.
Appreciate the help
Thanks
Mick