Hey guys! I'm buying my first DSLR (D7000) and was wondering what a good overall lens would be if I could chose just one till I save up for more. I shoot mainly cars and landscape/scenery type pictures. I know the camera comes with the option of the 18-55mm so should I just stick with that or I kind of liked the pictures I've seem of some Nikon lenses such as the 50mm Amazon.com : Nikon 50mm f/1.8G AF-S NIKKOR FX Lens for Nikon Digital SLR Cameras : Digital Slr Camera Lenses : Camera & Photo or Amazon.com : Nikon 50mm f/1.8D AF Nikkor Lens for Nikon Digital SLR Cameras : Digital Slr Camera Lenses : Camera & Photo what is the difference between those two by the way? Thank you guys!