I am trying to stitch together images taken with a digital 10.5 which works out to a 17mm film focal length. I have taken the pictures correctly as described in the manual for a 17mm focal length. However, auto stitch does not correctly line up the images, and when I try to manually stitch, the images cannot be lined up as well. So I figure that it is a problem of distortion. I tried to then calibrate the images to fix the distortion and it gets to about 75% before giving me an error message that says it cannot calibrate the image. Does anyone have any suggestions as to what I am doing wrong here?