Jeanne and I spent yesterday in the thin air of the Colorado mountains. The temp was 99F/38C in the city (Denver) and 50F/10C at the top of Mt Evans. It is 14,000 feet/4.000m above sea level. It started to sleet/slush/rain when we were at the top. It's the monsoon season, so you have to go early. We'll leave the studio next Saturday morning at 0600. That will give us several good hours of making photographs.
The place is stunning and mind boggling all at once. We drove the longest/highest paved road in North America to get there. The drive was fun! A lot of it looks like what I would imagine some distant planet might resemble. Very few plants or animals can survive at that elevation - no trees - only small plants and grass. It's brutal! Jeanne and I were climbing over over some huge rocks to do some photos and I was instantly winded. There's not much oxygen at 14,000 feet. It freaked me out a little bit. I need to remember to move slower next Saturday.
The Collodion was thicker and dried faster up there. The UV was off of the charts. I was making exposures of one to three seconds with my lens stopped down to f/7 and f/22 respectively. My face got sunburned too. I thought living at 5,200 ft was intense, at 11,000 and 14,000 the sun seems overwhelming. It would be nice to work with f/32 and f/64 that way, you could do several second exposures and make some really nice photographs. One more thing, I was using old Collodion, too. I'm not sure you could get an exposure there with new Collodion unless you had a shutter. Stop action Collodion photography at 14,000 feet!