[Stephane]

Thanks Mark, Hans and Martin!

Originally Posted by Startrek

Nicely framed too , although personally I like my diffraction spikes north south on an image , some folk don’t really bother. Did you crop quite a bit around the image ??

Thanks, I didn't pay any attention to where the diffractions spikes would appear, but for now I think I quite like that random look. Maybe in time, I will try orienting them.

I cropped a little, maybe 15% of the image was cut off. I had some weird colours and dark corners that I couldn't remove in processing. Perhaps in time, as I improve processing skills, I won't need to crop so much. Not having any flats surely didn't help. This camera has very heavy vignetting.

Originally Posted by Startrek

Background obviously needs cleaning up, but calibration and some processing can fix that issue. Also to get your PHD2 guiding up and running on a first attempt is a tremendous achievement, some folk struggle with it.

Yes, agreed. I might actually take some flat frames now and re-attempt processing, maybe slightly darker this time. I am also looking forward to adding much more data to this image.

Thanks Martin re guiding, I believe it's thanks to all the parameters you sent me. They worked perfectly first time. I polar aligned with the 3 point polar alignment technique in NINA which Cuiv raves about. It got the mount polar aligned within an arc minute. Not sure whether that would help guiding, but I'm glad I did it.

Originally Posted by Startrek

Next time maybe push for longer subs up to 2 minutes and see how your stars fair

I'd love to. The only issue I am having with NINA is that it is not allowing me to do more than 30 second exposures which I found extremely annoying. 30 seconds is the limit of the camera. I have an intervalometer which overrides that and can take longer subs, but I haven't worked out if / how Nina can override it.

Originally Posted by Startrek

Did you use a coma corrector as I can detect a little bit of coma towards the corners or maybe Collimation is a tad out ??

I did use the coma corrector. I have the same one as you the Baader MPCC MkIII. I attached it to the ring adaptor on one end and the L-Extreme filter on the other end. Not sure why there is still coma and have no idea how I am going to fix that

Thanks for all your input.
Stéphane