Next time I want to go two minutes to get the outside stars with maybe 20 exposures and then the same with 60 seconds and 30 seconds. The problem with central sydney is i need to use an astronomic UHC and it gives a blue tinge. When i see other versions of omega they have lovely yellow stars. Also I have to crop a bit as my focal length is only 480 mm with the reducer.
Thanks everyone, at least i managed to not overexpose the core.