Hi there, Going trekking in the Everest Region in Nepal, coming in from the east (Salpa Arun valley). Have done the usual circuits (Annapurna, Langtang, Everest) in teahouse style before, but never with a digital camera. This time I'm thinking of bringing my D700 (using solarpanel and extra batteries). I will be carrying my own backpack with clothes and sleeping bag for three weeks so I want to keep it light as possible, the D700 and solarpanel already weighing in. Also, I want to keep it simple and train myself to be more creative with just one lens. But which one lens to take? I know many think the 24mm is good for landscapes/nature but that's one I don't have. My collection of primes is: 20mm 2.8AFD, 35mm 2.0AFD, 50mm1.4AFD, 85 1.4AFD, 180mm 2.8AFD, 28mm series E, 100mm series E... Which one to bring? Thank you for your recommendations!