Ok I'm new to non point and shoot cameras (and night photography), so apologies if this is a dumb question. How do I focus at infinity at night if I want to capture stars, meteors etc without there being anything really bright enough for the camera to auto focus on, or me to really judge doing so manually? The manual focus ring doesnt stop at the extreme focus distances, it just keeps spinning, so its difficult to judge when I'm fucussed out as far as I can go. Lowering my aperature will obviously give me a wider focus range, but will let less light in. I guess I could use the moon to set my manual focus, but is there any other trick? Thanks!