35mm, F8, 20s exposure and pixelshift. Processed in SilkyPix DS Pro 7 and the final touches were done in DxOPro 10 (geometry, distortion, contrast).
First of all, I was not quite able to position the camera, so that the map on the wall would be parallel to the camera's sensor. Another problem was "flattening" the map. I was not quite able to get rid of all the distortion introduced by the lens. It was shot in a room with windows on the left side of the camera and behind the camera, so I ended up with a shadow from a camera in the middle of the map.
For the sake of comparison here is a shot made with DA* 60-250 (processed in the same way) :
Because the shot was done at 250mm, the working distance was longer and the shadow cast by camera was far less noticeable.