i shot it with the 70-200mm/2.8 IS at 135mm - Canon rebel xt. i didn't intend to make a wide field-of-view shot. i was kinda just trying to overcome the resolution limit of the camera. the stitched image is 7558x7558=57.1Mpx, over 3 times bigger than the 1DsII's 16.7Mpx :D
by the way the same...