Fred,

Try this. http://www.panoramabrackets.com/images/camerano…

Terry

Just to save you some time, as you swing the camera side-to-side, observe the way the more distant object moves in relation to the near one:
If distant object moves OPPOSITE of swing; tripod-screw-to-pivot distance too LONG
If distant object moves in DIRECTION of swing; tripod-screw-to-pivot distance too SHORT

In other words, if you swing the lens to the right and the distant object moves to the left of the near object, your pivot point is too far from the tripod screw.
Tom

Fred,

I have some values for you, and there was an identical question in the general gigapanning section so I’ll post them there, just look for “100-400” in the title of the post.