Originally posted by Gimbal Have you tried using iso 80 instead of those high iso numbers? You will still find the dust clouds in the shadows and the blown out areas will be much smaller. The iso 80 shots are not fun to look at unprocessed though as they will be very dark.
Thanks Gimbal, and yes I like lower ISO too, but you need a fairly accurately aligned Equatorial Mount then, don't you?
I don't have a permanently installed equatorial mount and have to drag my mount to and from the balcony each time. Quite often I just don't have the energy (or the time) to do very accurate polar alignment.
Also improtant: In the terrible (seeing-wise) winter nights under a heavily light polluted city sky that I have right now, long exposures aren't really an option.
And actually: High ISO isn't what it used to be. When I compare ISO 3200 and 1600 on my *ist DL with what I get from my K-5, I must say that whatever Pentax has done (including some hidden in-camera proccesing, I guess) the newer sensors are far more useable for astrophotography. I know I don't produce master pieces this way - but I do have great fun.