Good discussion, very helpful. However, the Main Camera's DollyZ 0.0 position is not the 0,0 of the studio. It's hard to tell by just moving it around, but the camera is at the 0,0 origin of the studio when you move it to DollyZ -1.00. I think the focal distance in the Render Options is measured from the studio center, however, rather than the distance from the figure to the camera. Real focal distance is measured in distance from camera, of course. I've tried to test this by shooting renders along a prone figure, but so far all I have is pixel hash and an occasional braindead computer. Mick