etill
21-06-2020, 03:42 PM
Finally got a clear night during the week to test my new set up. It wasn't the best night even though it was relatively cloud free, but everything seemed to work out pretty well.
Polar alignment was good this time, guiding was going very well (.7 to .8 for this set of subs) which may be due to this scope weighing 3 or 4 kilos less than my other one, even with the camera and guide scope.
Anyway I took a quick set of 20 x 120s @ ISO800 with my Canon 60D. The scope is a Saxon ED120 with the Saxon/Skywatcher/Orion 0.85x reducer. No dithering or anything, I was just testing waiting for my actual target (M20 later on in the night).
A couple of other changes I made were to split the RGB channels out in PI and then linear fit them to green before recombining and continuing the usual processing. I tried a few combos, but fitting to green seemed to give the lowest noise and least saturated / blown out stars.
Couple of questions, are these star colors getting close to correct? and is the overall color balance good? The filter was an optolong l-pro and the canon is modified now, but it's more red than I expected.
Also I've added the aberration inspector mosaic from PI (from a single sub), I think that is sensor tilt? Bottom left and top right panels sho the elongation of stars I expected around the edge of the field, but top left and bottom right don't.
Any suggestions or advice welcome..
Polar alignment was good this time, guiding was going very well (.7 to .8 for this set of subs) which may be due to this scope weighing 3 or 4 kilos less than my other one, even with the camera and guide scope.
Anyway I took a quick set of 20 x 120s @ ISO800 with my Canon 60D. The scope is a Saxon ED120 with the Saxon/Skywatcher/Orion 0.85x reducer. No dithering or anything, I was just testing waiting for my actual target (M20 later on in the night).
A couple of other changes I made were to split the RGB channels out in PI and then linear fit them to green before recombining and continuing the usual processing. I tried a few combos, but fitting to green seemed to give the lowest noise and least saturated / blown out stars.
Couple of questions, are these star colors getting close to correct? and is the overall color balance good? The filter was an optolong l-pro and the canon is modified now, but it's more red than I expected.
Also I've added the aberration inspector mosaic from PI (from a single sub), I think that is sensor tilt? Bottom left and top right panels sho the elongation of stars I expected around the edge of the field, but top left and bottom right don't.
Any suggestions or advice welcome..