Recently I took an architectural picture with my 240 Dagor of my 8x10", and I ra ised the lens as much as I thought possible. I seem to have moved it out of the image circle, but not at the top of the picture (the ceiling) where I would have expected it, but at the bottom (the floor), which should have been well coverec with a lens rise - or at least I thought so. Can somebody explain this to me?

Lukas