    Senterice 1: How:can't blur the background and focus  the. object with an. 18-5Smm lens using a Nikon  3300?    Sentence 2: Which’ caméra should:| buy? The Carion  4200D with, 18-SSmmm & 55-250mm dual kit or the  Nikon 03300 with only the 18-55inm tens for the same  price as the 1200D