I've been reading some reviews of the Xpan(I don't know that I'll ever be able to afford one but...)and saw something concerning vignetting on the film in panoramic mode using the 45mm lens.Does this always happen?Also for anyone that uses this camera,can a 6x7 enlarger handle the printing of one of the panoramic negatives without falloff at the edges,thanks for any replies and forgive my ignorance.