Of course, it is also important to know how far the moon is from the earth. So the closer to the earth and the fuller the moon, the more light you have. At almost full moon, it can also be photographed with a strong lens partially out of hand. However, if the camera does not allow high ISO values, or the hand is very restless, you can also use a tripod and long shutter speed. But even here, you hardly believe it, the moon moves relatively quickly - so the following rule of thumb, so that the moon is sharp even with long exposure, you should not expose longer than: one second divided by one-tenth of the focal length. At 300 millimeters, 1/30 sec would be the maximum, at 500 millimeters it would be 1/50 sec.