I probably should have used my Ha filter for this rather than the Neodyum filter, anyway 6x5min subs binned 2x2, this is a very dim target. I'll work on the processing later a bit more.
(http://www.jumpers4goalposts.org.uk/images/Trash/M101OASa.jpg)
I have no applied a gradient correction and fat star correction to the image as well
(http://www.jumpers4goalposts.org.uk/images/Trash/M101-proc.jpg)
...& inverted it... had me confused for a bit :( Is fat star correction ethical? some of them look too perfect & round...
Great image anyway - you should try with more aperture & Ha especially if you can do 5-10min subs - It's probably still around in May - I bet you could get great results on this from Headcorn..
Sorry last post was me - John
Depends what you want to do with the image, if you de-fat a star then you can't use the image for photometry, but it makes it look better. take care that artifacts are not introduced by your processing, the worst introducer of artifacts I have found is Photoshop minimise.
Nice image John, what is the nebula on the centre left of the image?
Galaxy off to the left at 9'0 clock position is as follows:
Object name: NGC 5477
Object type: Galaxy
Magnitude: 13.7
Size: 1.6'x1.3'
Position angle: 95°
Cheers, John
Nice one John.