This tool for photographing the Moon will give you the estimated shutter speed required based on your ISO, aperture, weather condition, Moon location and phase.
To display the suggested time exposure, select the weather conditions, the sensitivity (ISO) and the lens aperture (f/number). The time exposure will then be displayed and computed every time you modify one of those parameters.
The time exposures are only given as a guide. They will help you choosing a film matching your equipment and the event you are shooting. However, you should bracket your exposures one or more stops to take into account the actual sky conditions and the variable nature of these phenomena.
Tips on taking successful Moon pictures
Use a sturdy tripod.
Get a good 500mm class lens to avoid cropping to much your pictures.
Enable mirror lockup to minimize vibrations and use a cable release.
Shoot in RAW.
Set the white balance setting to either Daylight or Tungsten.
Set the aperture to a value in the f/8~f/16 range.
Set your lens on Manual Focus and focus for infinity.
A rough exposure guide would be as follows: Full Moon -> shutter = 1/ISO and aperture at f/16
Gibbous Moon -> shutter = 2/ISO and aperture at f/16
Quarter Moon -> shutter = 5/ISO and aperture at f/16
Crescent Moon -> shutter = 10/ISO and aperture at f/16
Exposure compensation: Moon high in the sky -> none
Moon in mid sky -> +1 EV
Moon at/near horizon -> +2 EV
Mist or haze -> +1 to +2 EV
Bracketing your shots 1 or 2 stops on each sides is also necessary.