> The phase doesn't matter if the moon itself is your subject; the > brightness of the bright portion is essentially constant (the main > variable is the clearness of the air between you and it, and that > doesn't vary with the phase). > > I learned this one from an Ansel Adams book. There's a rule of thumb > for exposing an object in direct sunlight -- the "sunny 16" rule. You > give it 1/ASA at f16, for whatever ASA film you're using. > > Well, the moon is an object in direct sunlight. David that theory is oft repeated but sadly it is no where near that simple. http://www.calphoto.com/moon.htm 1/100 af f16 tends to give very dark exposures of even the full moon. 1/100 @ f11 (or even f8) is more likely to give good results. As to the brightness being independant of phase ... www.roboticobservatory.com/jeff/lunar/obs_tech/albedo.htm the moon does not appear to act anything like a lambertian surface ... Bob _______________________________________________________________________ Freeserve AnyTime, only £13.99 per month with one month's FREE trial! For more information visit http://www.freeserve.com/time/ or call free on 0800 970 8890
