Thanks mediumformatfan. This is ~ a 40% crop of the full frame. The foreground has been taken out. I set up the camera using a Manfrotto Spirit Level so no adjustments were necessary this time. Sometimes, no matter how careful you are, one does not position the camera "dead centre"/perpendicular to the subject and the image then needs a small bit of centering using the Left/right adjustment in DxO plus a tweak to the Horizontal. DxO is just amazing for corrections to Geometry. Steve