Are there any super zooms available like the Nikon 18-200 VR or another brand (Tamron, Sigma) for a Nikon D700? I've already got the Nikkor 17-35 f/2.8, 50mm f/1.4 and 70-200 f/2.8 VR but it's really too much weight to carry around on a climbing or skiing expedition, plus I need access to the camera from a hip belt/pouch without changing lenses. If not, I'll have to buy a D300 or D90 along with the 18-200 VRII. But I'd prefer to purchase just the lens.
http://www.pbase.com/mikelong