Quote:
Originally Posted by strongmanmike
I don't see the radial nature you are suggesting Brat, to me it is not a chromatic aberation issue. It is a simple registration issue that I will have to show more care with next time, registration with such large swaths of sky at this focal length needs a little more care. My first image of the Centaurus Galaxy Cluster doesn't show it...must have taken more care that time 
Mike |
You're right, no signs of lateral chromatism in that image. What made me suspicious - see the crops from left and right sides of your M104. Red fringe innermost on both (to the right of the left corner crop, to the left at right corner crop). I still can't understand how (mis)alignment can produce something like that. One possibility is that red light image was done at shorter f.l. , either caused by ambient temperature shift of some other weird combination of parameters.
Bratislav