    dentence I: Which is better.  the Canon LO5 1200D with 18 55mm  55 250mm lens 50mm lens combo  or The Canon LO05 600D combo with  18 55mm lens + 55 250mm lens?         Sentence 2: Why is the Canon  600D with 18 55mm and 55 250mm  combo lenses more expensive    than the Canon 600D with 16 135mm    *    