Hello, i am an beginner in the digital slr world but i do not want to waste my money on a camera that will not last or does not have the features that i need, what i am deciding on is a nikon d80 body only and a nikon 18-200 lens, but i am wondering if this would be a good all around lens for all situations and would my wife be able to handle this, also will it autofocus? i will be using this camera for everything, nature, urban landscape, and family pictures, please help.