Last night I think I learnt a valuable lesson when it comes to astrophotography - leave long exposure noise reduction off. Two things this does, firstly it speeds up the whole affair meaning that after a 30 second exposure you don't gave to wait another minute while "job nr" displays before you can see if the image was any good. This also saves a heap on battery life. Instantly you can check if the composition was gold and if you got the white balance anywhere near something sensible. Secondly the image is not devoid of stars. Yes the black of night is not a lush deep smooth black, but then that's pretty much what I'm after - stars, which to a machine look a lot like digital noise. The other win last night was the raw K white balance setting allowing a far greater gamut of colours from 2500K to 10000K. I settled on about 3500 toy give the green of trees and the blue of the night sky. Results to be posted later.