I have a Nikon D70s. I bought 2 lenses for it as I am trying to get into portrait/fashion photography. I bought the 55mm f1.8 and the 55-200mm nikkor lenses. I have been using them both a lot. But I have yet to use the lens that came with the camera. It's a 18-70mm f/3.5-4.5G ED-IF AF-S DX Zoom-Nikkor lens. What can I use this lens for? I mean what situation is it best to come in handy? Especially in a high fashion style photoshoot.