This album contains direct comparisons between the seeing quality near Canberra (@ 600m) vs Tinderry Mountains (@ 1450m) 56km away, using the same imaging system.

Using MaximDL to analyse the FWHM of raw sub frames taken from Eagleview, regularly reveals averages between 1.5" and 2.0" with the occassional dip down as low as 1.2"
which, realistically, is about as good as it gets in Australia and empirically close to the sort of conditions experienced at both Siding Spring NSW and Freeling Heights SA.