That looks very much like chromatic aberration to me.
What exactly does your imaging train look like? Are you using any sorts of filters or focal reducers?
Not sure about the fact that it was low on the horizon. I sometimes image low as well and never seen such aberrations in either case.
Just my two cents, hope you can work it out.
Quote:
Originally Posted by vlazg
Hi Russ ,  yeah it was pretty low on the horizon, remember i am at 12 deg south and it was past the meridian when i commenced the sequence.
I thought of that myself and am going to try something higher to see if i get the same effect. I processed the 1st image and had the same effect, i don't know if this means anything but the blue colour is to the left of the stars and when i zoom in to a yellow star the red/yellow is off to the right.
I have a TMB WO FLT 110, one of the early ones.
Moving the blue channel to the right did not improve anything. |