[_ph_]

It of course depends on the focal length of the lens, but with a tele lens in the 200-400mm region (also depending on your sensor size), I would estimate that the moon crosses the image in the order of a minute. There is plenty of time to frame and focus the shot, but you have to readjust your camera every couple of shots. This motion is just the earth rotation and the same for the moon, the sun and all the stars. The rotation of the moon around the earth becomes noticeable only from day to day, as the moon roughly moves 13 degrees/day. Tracking mounts have a separate speed setting though, which does take the moons movement into account for greater precision.