On Fri, 3 Dec 2004 astrodeb@charter.net wrote:
I just called Camera Country and found out they do E6 and push processing. I just need to set the ASA film speed to 800 for "Push 2" or set the film speed to 400 for "Push 1".
When doing astrophotography, are exposures not controlled (i.e. timed) manually? If so, what does it matter what the ASA is set to? Camera dummy that I am, I had thought that the "ASA setting" was merely an input to the camera's exposure calculating machinery, which is inactive when exposures are controlled manually. Hence, I would have guessed that for astrophotography purposes, the ASA setting of the camera wouldn't make a difference. What am I missing? I know next to nothing about the art and science of photography, so I beg the list's collective forgiveness for the ignorance revealed by my inquiry. :-) Chris