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Hi Michael,
Thanks for responding. I use a Skywatcher 72ED, a .85x reducer and the Canon is connected via t-ring. I achieve focus with the draw tube approximately 10mm out. From what I can see I should be well and truly connected properly, I feel as if the problem may be with the DSLR, perhaps an issue with the sensor?
I have attached a pic of my latest attempt using this setup. This is 46x600sec exposures, should be alot better than what I have ended up with. I have used master darks, flats, bias and a bad pixel map all correctly captured at the same temp, ISO and duration required.
Just cant seem to nail it.
It has been a while since I tried imaging without the filter, perhaps as you say it might be the cause of my problems.
I live about 7km from Brisbane CBD so light pollution is quite heavy.
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