I mistakenly posted my question in the photo section and was just made aware of this discussion forum. Wow, looks like a lot of good stuff is here.
With my T2i and 100-400L, I can't even see any stars in live view to focus on and stars are way too dim in the viewfinder. My dark sky area is in a state forest overlooking a swamp so there is no distant light source to focus on.
Will a camera autofocus on the beam of a green laser if the laser is held off to the side? Or can I manual focus towards the end of the laser beam? Anyone tried this?