Quote Originally Posted by jstraw View Post
Are the ballheads' balls marked in any way so that the neutral, vertical position can be found quickly?

If I understand your question correctly, the answer would be no. There is the usual notch on the side for flopping the camera from the horizontal to vertical orientation, but there are no marks to indicate when the ball is in the neutral position in either orientation.

A two-axis level, combined with a leveling base, would be my recommendation to insure you have both a level platform and a level camera.

Kerry Thalmann
Really Big Cameras