I am in look for a smart slr camera to visit few cities of Europe and the photography would include of ice laden mountains , sea, rivers , cities etc. I have zeroed to Nikon D 5100 and at every site or shop, it's clear that it is Nikon D5100 SLR (Black) with AF-S 18-55mm VR Kit Lens. I am confused about the zoom power of the camera. Would I need to buy another lens for zoom or this lens would work for me. I don't want to put extra money since this camera is already expensive. Pls guide me about it's zoom capabilities.