Soul Nebula work in progress

[The Thing]

Carole wants your crib sheet.

[MarkS]

Grabbed another 5 hours last night.  SQM at High Halden was only 20.9 instead of Kelling's 21.3 or 21.38 

However, looking at the subs, the difference is actually fairly marginal in terms of background noise levels. 

[MarkS]

Just when I thought I had finished the processing, I find some hot pixels.  So I need to do another full re-process.  Buit apart from the hot pixels, I'm pretty happy with this.

180 x 5min at ISO 800 (15 hours in total over 3 nights - 2 at Kelling, 1 at home). 
Modified Canon 350D on Tak Epsilon 180ED at F2.8 
No filters except the IR/UV rejection filter.



Larger version here:
http://www.markshelley.co.uk/Astronomy/2012/soul14092012v2.jpg

Mark

[Fay]

Very nice Mark, love the star colours, what a marathon!!!

[JohnP]

superb Mark (as usual) - still waiting for the book announcement... John

[Carole]

Absolutely gorgeous Mark.
I love your star colours, I can never seem to get decent star colours, and I wonder whether it is because I use DSS and you use Iris. 

Carole

[Mike]

Lovely image Mark. Definitely a calendar contender!!

It is obvious from my own experiences with the DSLR, particularly on a smaller aperture than you have, that what you say about getting as many hours as possible exposure certainly applies. They may be easier in some respects than a cooled CCD camera to use but at the same time you need significantly greater exposure times to get the same results. Oh how I miss my SXV-H9.