I need to carry a 500 C/M body with f/2.8 Planar, a 60mm f/5.6 Distagon and a 150mm f/4 Sonnar. In addition, I use a Pentax spotmeter and I carry an extra film back and a chimney finder, plus filters, hoods and extra film. I'm in the market for a good compact backpack. The Tamrac 5273 (M.A.S.) Expedition 3 Photo Backpack looks like it might do the trick (and it is inexpensive). Does anyone have experience with this bag, or can anyone recommend an alternative.