What I know, is that the auto-focus works better with lot of light. During night shots it is allways better to use manual settings, or you will get a very strange behaviour of the lens.
Usually, when I take night pictures, I try to work with the greater aperture as possible, but something very important, is the use of a tripod.
Last but not least, to take a picture of the moon, I'll use a tele-photo lens. I use a Sigma Mirror-Telephoto FD 600mm 1:8, with a Tamron SP F System 2x Tele-Converter. The result is great, but the shutter must be opened quite a long time.
I hope the results of your next film will be good.