Hello Folks,
I keep trying things in processing.
The dark subtraction, alignment and stacking were done with Siril. Iam impressed with Siril's all star alignment. The rest of the processing was done in Nebulosity 3.
This picture is the result of 7 8 minute exposures on 2/7/2019 and 8 seven minute exposures on 3/7/2019, all at ISO800 with Canon 60Da at prime focus of Mewlon 210. The seeing and tracking was better on the 2nd, attached screen dump of PHD2.
The stars seem bloated to me, what suggestions do people have?
A nice image Chris and one to be proud of as there are some nice details in there.
My thoughts cause me to ask...how do you reach focus?...could the focus be sharper? Do you use a mask?
The exposure times seem rather long and I wonder if shorter exposures may minimise the issue?
In any event perhaps find some software to round up and reduce star size if it worries you.
Nevertheless well done I say.
Alex
Hello Alex,
Focus was good, not by a mask but by getting the best spider vane diffraction spikes in the Canon live view and checking in Nebulosity preview on B Crux, near the target.
I think you are on the right track about exposures, The 7 minute exposures are ok but the poorer guiding let me down. I did take a series with 6 minute exposures but they seemed under exposed. Perhaps I should have another go at processing the 6 minute set.
I hunted up an APOD image of this object and decided that I had been chasing the wrong thing in my image. So here is a reprocess, less emphasis on the core of the galaxy.
I would do another capture series but Jupiter Pluvius thinks thinks otherwise.
Alex, if you should see this picture any comment?
( I am enjoying your simple ob thread)
