A casual look at the photos made available, might give the mistaken impression that most of our time was spent in base camp. In fact the opposite was true. Estimates are we spent less than 15 days a year actually in base camp. The rest of the time was in the field (sometimes on the "green line"), where carrying cameras around was not practical. They added extra weight to the usually overloaded pack, and cameras did not survive well in the wet, sometimes shock and projectile ridden environment.
Most of the photos were taken with the old "Instamatic" camera.
