[Nico13 (Ken)]

Well finally got some time out with the gear last night and was trying different things to reduce the vignetting when taking images through the 8" Meade SCT.
Had been using the f6 flattener reducer and running focus right out to the furthest back focus point and while this reduced the vignetting some what it didn't do much for the focus and aberrations at the edge of the image even with the corrector in so I wound up working with just the camera and cropping the edge slightly to remove the worst at the edges.
Sky was clear, seeing was average to good, more average I think.

Centaurus A was
102 min of 6 and 3 min subs with darks applied in images Plus and CS6
Pentax K5 at ISO 800
M83 was
72 min of 5 min subs with darks etc, I stopped there as I needed to flip due to crossing the meridian.
I should have done some 8 min subs as I had done some test shots on this last month and got better colour but forgot that I'd done them so went with the shorter subs. I've added an inverted image of M83 just for interest so you can see the galaxy structure a bit better.
ISO 800 again Camera seems to give best results at that as its not cooled.
Mount and guiding details below.
Thanks for looking and comments welcome as usual.