I was trying again last night and can't get much out of Liveview. On a very bright target like Alpha Centauri I can just see it, but as a focusing aid it is not very useful (camera set for ISO800). On a target like Eta Carinae "I See Nothing". Certainly during the exposure there is nothing showing on the screen.
I managed to get a couple of exposures of Eta Carinae by sheer luck more than skill.
It seems that my particular 450d takes a long time to 'digest' a 30 second exposure and I was not allowing a long enough interval between exposures which messed up the sequencing of the intervalometer. Is there a rule for how much time should be allowed for an interval (for camera processing)?
I am thinking that I am doing somethings fundamentally wrong.
