M101 imaged on 24th March. 300 exposures of 30sec making a total of 2.5 hours. Modified Sony A7S on Celestron C11 with Starizona 0.72x LF SCT corrector.
(http://www.markshelley.co.uk/Astronomy/2020/M101_20200324_small.jpg)
As always, I've tried to keep the colours as natural as possible.
The full-size version is here:
http://www.markshelley.co.uk/Astronomy/2020/M101_20200324.jpg
The arms are quite faint and need a few more hours of data, so the processing is quite a balancing act between detail and noise. There's possibly some room for a bit more noise reduction.
Mark
Lovely Mark, I have always found this one to be quite difficult.
Carole
Very nice Mark, unfortunately the posted picture has a lot of field cut off but the full size is lovely.
Looks like some hot blue giants are resolved too :)
Robert
I've realised that I made an error during processing, so this appears a lot more green than it should. I'll produce a new one with more accurate colour balance.
Mark
extremely good Mark
Very nice Mark.
Noel
Thats nice, beautiful detail,
Roger
That's an excellent short Mark - the detail is superb.
Roberto