That was about a twenty minute exposure, taken in the Lake District. At that length of exposure digital cameras tend to struggle with "noise." My D70 (which I used for that, but has since broke), and now my D7100 has some internal software to try and deal with that.
I can't remember if I posted this here yet:-
Wasn't happy with that at all. When I checked the picture afterwards, there were a few stars in it, and they looked like a small line, which suggests either the camera moved slightly during the five second exposure, or the sky moved. I'm guessing the former...
Best moon shot was this:-
I suppose I should apologise for hijacking this topic