Quote Originally Posted by banshee1 View Post
Thanks for the info Baker. So the whole tube slides and not pivot on a fixed point? Wouldn't have thought that.

Thanks again.
Mike
It pivots. If you look at that second cutaway photo under the magnification ring you will see a black square ring. That's a rubber seal/bushing that holds the rear of the erector tube in place at the back end and allows enough give to allow the movement needed when the front of the erector tube is pushed left/right/up/down by the turret screws/spring(s).

The only part that slides is that rear section under the magnification ring. When you turn the magnification ring it moves the rear lens of the erector assembly (one with crosshair in it) and it's inner sleeve forward and back. This change in distance between that lens and the lens stack in the forward part of the erector tube is what causes the change in magnification power.