$20500US....at just a straight conversion (no add ons), that's roughly $25000AUD. With everything else, it's 1 x 10^15AUD (that's with the 20000% markup by the wholesaler out here, as he wants to buy that new mansion at Potts Point and the Veyron in 2hrs time).
For that camera, you want something big and fast...say a 24", f3 astrograph