Thanks Martin,
yes I will be looking at investing in a designated processing program such as Startools in the near future.
Thanks for the offer of help, I will keep you updated when it happens.
Adam, thanks for the links, they were quite helpful.
This is my first image taken with the 600D.
I`m sure a library of darks and flats will be of benefit
I noticed the band became more prominent when I changed
the hue to purple.
You can see the variation between the two images.
Same image, same program, different processing technique.
The banding is still there but less apparent in the second image.
I am interested to see what may appear when using a higher ISO and longer exposures.
I`m not fazed, it`s just another facet of the hobby to make it more interesting !!
Paul.
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