Jeff Stone used a Canon Rebel XTi, at 1/30sec, f/5.6, ISO 400 for this photo. I appreciate what Jeff was trying to accomplish here and like that he used the clouds to frame the moon. The exposure was needed to have enough light to give detail to the clouds and yet the moon itself appears a little overexposed. Generally moon images are shot with a smaller aperture such as f/11 or f/16 and try a lower ISO. Play around with your settings next time using a smaller aperture, lower ISO and various exposure times to get a more defined moon.