Nikon AF-S Nikkor 16-35mm f/4G ED VR
Nikon's 16-35mm F4 VR is the first true wide zoom to sport optical stabilization, but thankfully doesn't compromise imaging performance to do so. It's an excellent choice particularly for full frame users, but you do need to be aware of its pronounced barrel distortion at wide angle.
Users of full frame Nikon SLRs looking for a wideangle zoom that's less expensive and more portable than the existing F2.8 options.
Architecture and interiors (due to distortion at 16mm), DX users (due to limited range)