I read that the Sunny 16 rule also works when photographing a full moon. The Sunny 16 Rule says that when shooting in full sun if the aperture is set to F16 and the shutter speed to the same number as your ISO, the picture will be exposed correctly. This moon shot is straight out of camera with the shutter speed at 100, F/16 and ISO 100.
Manual: pages 35 and 36 “White Balance”
Inspiration: Jim Garner