Hi,

If you can live with something a LITTLE shorter, and can get by with modest movements, I recommend the little 200mm f8 Nikkor M. It is BY FAR the lightest lens in this focal length range. And, within its modest 210mm image circle, an excellent performer. It is multicoated and available both new and used. Unlike all the other 210s, it's in a Copal #0 shutter, which helps keep the size and weight down (52mm filters, 180g). For more info on this lens, see:

http://largeformat.homepage.com/mid-rang.htm

For more info on lightweight lenses in general, see:

http://largeformat.homepage.com/lightwei.htm

and follow the links to the various focal length ranges.

I do a fair amount of backpacking so I tend to be a bit anal about keeping the weight down. On my most recent backpacking trips, I've been carrying a four lens set consisting of: 90mm f6.3 Congo Wide Angle, 135mm f5.6 APO Sironar-N, 200mm f8 Nikkor M and 300mm f9 Nikkor M. These lenses are all very compact and lightweight. When I want to go REALLY, REALLY light, I take a three lens set consisting of: 90mm Congo WA, 150mm f6.3 Fujinon W and 240mm f9 Fujinon A. Eventually, I will probably replace the 90mm Congo with my new 80mm Super Symmar XL. The 80mm SS XL will be bigger and heavier, but still a very compact, light weight lens. It will also have a bigger image circle and most likely better performance.

Anyway, there's a lot more detains, specs and pictures at the links above.

Kerry