I use the 40D too. Shift is my most used function of the TS-E24L. Shift high DOF shots are fun to do though. I can't remember if the DOF preview button works with live view for sure, but think it does. Live view is great once the camera is on a tripod to get a precise manual focus.





I'd recommend manual mode exposures be made first with lens tilt/shift adjustments following. A hotshoe level is great for use when shooting buildings or other structures.