...wow very flattered
Fine result indeed Richard and very deep
It does look like your processing has produced a sort of dark ring around Cen A's halo..? What do you think? Might just be the HDR?
I have to say when I completed that image in mid 2008 I thought for sure with time many others would be producing similarly or even deeper images of this iconic galaxy, in a similar way that images of M81/82 have become deeper end deeper....but it seems clear it is not so easy to achieve
Mike