[raymo]

Hi again Chris; the infinity setting is useless for astro shots, almost all lenses go beyond the infinity symbol. In Live View choose a bright star, magnify it10x and a white dot will appear in a box at the bottom right corner of the screen.
Adust the focus until the bright star becomes as small as the
aforementioned white dot. If using a zoom lens, make sure that the focusing is carried out at the same focal length that you use to take the shots, as moving the zoom will change the focus.
raymo