This year I plan on making a summit bid on Aconcagua (~7000m) on the border of Chile and Argentina (highest peak in North/South America) via the "Normal Route" and ideally a bid on Denali/Mt. Mckinley (~6200m) in Alaska via the highly technical "Cassin Ridge."
Now, I've asked questions on Supertopo, MountainProject, Summitpost, etc. about appropriate cameras and usage but keep in mind that primarily the responses I got were from climbers who view their cameras as nothing more than souvenir-taking curiosities. Or "aid" rock climbers that are accustomed to climbing giant rock-walls like El Capitan in Yosemite and have no concept of how terrible weight is in alpinism. Or true mountaineers that will respond with "a camera? Why don't you strip off the plastic casing and replace it with electrical tape to save 20g?"
Now, Aconcagua is not a very technical climb so I'm not hugely worried about bringing a camera up (except for maybe surviving the bad winds). Denali, however, is an entirely different beast. To give you an idea about what me (and this potential camera) are up against....
You'll notice around the cassin ridge area there is some highly technical ice/rock climbing involved. This means that if I'm going to be taking pictures on the way up, the camera needs to be easily accessible from my harness. I have a light climbing pack, but something tells me that if I'm flipping out from being forced to climb crumbly vertical ice that doesn't take ice-screws well, I'm sure as hell not going to reach into my pack to grab a camera. So I'm thinking I can clip it into one of the gear loops of my harness with what's called a "trad draw". Essentially, two carabiners connected with dyneema webbing. One carabiner clips into the camera, the other into the harness. This way, when collapsed, the camera is close to my waist (my center of gravity isn't affected by a swinging camera) and when I want to take a picture, I simply extend the webbing to be able to take a picture comfortably (and have the camera tethered so if it falls, it doesn't fall and tumble 20,000 feet to the bottom).
The technical aspects aside, i need a camera that weights next to nothing, is weatherproof enough to not die if it's -40 outside or handled with snowy gloves, and handles extremely variable light conditions well. Let me expand on that last point a bit. I don't know how many of you have been on a glacier... but let me tell you... it's like going to the beach. The amount of sunlight reflected back from those things is mindblowing. If you are exposed to glacial reflections for too long, you can actually suffer permanent eye damage and get horrible sunburn. This is why we use "glacier glasses" which cut 85% of visible light. Is the camera (presumably a P.O.S) going to be able to handle such insane lighting conditions well? If anybody has experience with this stuff I'd love some input.
Budget is under $1k ideally. But if there is something lighter and better, I'll go as high as necessary.