Paul,
HAHA
yes it's becoming a bit of an obsession...especially as , to me, since i'm starting from such a poor level of performance, any shot that looks a bit better than the last one fuels me up to work at it some more ...much to the chagrin of the girfriend i think...(thankfully clouds have moved in tonight...)
most if not all my shots are single shots unless I state otherwise on the pic label. I havent scraped up enough $ for a laptop yet hence no DSLR focus, no guiding etc...
i just use ahartman mask and try my best
I've also learned the other day (thanks JohnG) that I need to refocus throughout the night which I hadnt been doing before)
Something else to think about is when you focus using the live preview screen, turn it off for 15 sec or so to allow the camera to cool a bit before taking your shot. You may find you get less noise.
Paul, absolutely about JohnG, and I knew about the delay re 15sec and try to do so.
Andrew, I use the live view, both settings for focussing with a hartmann mask,
but I'm still sometimes off a bit
frank