I don't know that it's that big a deal. People here at the company routinely go to Nepal and
Tibet and are not in anywhere near as good a shape as I typically am in summertime at least. Biking or hiking in the mtns for atitude adjustment is important, and decent overall
health. But Everest basecamp is a trek, not a climb. And nothing special is necessarily
needed if your camera gear is in decent shape. Have family members and friends who have
been all over there, right to the summit of Everest and even more difficult summits without any winterization of basic manual film SLR's. Some of the fancy newer electronic cameras did fail. Modern leaf-shutter view lenses shouldn't be a problem. You'll need to keep meter & other batteries warm. I rarely print for other people, but have done some Himalayan stuff taken at extreme altitudes where nothing special was needed other than UV of SL filtration.
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