Digital Matt said:The same picture on the 30D will be cropped, because of the smaller sensor, to an equivalent field of view from a 640mm lens.
Matt, don't look inside the box. Just at the input (scene) and output (picture). I know that 30D crops. And that the two lenses have different focal lenghts. Just tell me if you're able to tell (apart from the noise) that the two pictures have been take with different cameras and lenses.
M.