I was looking to do some shots capturing the path of the moon across the sky (on the same frame) and was just wondering if anyone could help me with some advice. I'll probably shoot ISO 100 or 200 and plan to use a full moon initially and thus will apply the sunny 16 rule, but since i will be making multiple exposures i was wondering what peoples thoughts are as to stopping down. Assuming that it's just the moon against the darkened sky do you think that i should be able to get away with 1/125 for 3 exposures or should i stop down to cater for light pollution (in the suburbs and from the moon itself) and if so how many. Also if i were to include a lit foreground in the shot (say a city skyline) would i have to stop down for the skyline to get it correct for three exposures (and thus underexpose each moon shot)? I guess in effect i am looking for advice on appropriate aperature and shutter speed settings to take multiple shots of the moon on the same frame both with and without foreground. Later i would like to try more than 3 exposures (assuming that this method works to my satisfaction). Thanks.