Thu Jan 17, 2019 3:57 pm
Whoa Derek! Please report how it went, whish you luck!
I found this document regarding usage of consumer laptops at 10.000 meters:
https://pdfs.semanticscholar.org/6046/529f05a65e182ac9323ef8eb26b2075d0e13.pdf
Found these infos via Google:
Screen: if it was a normal LCD it should be ok at even higher than 3500, but it is touchscreen, so I found limits at 3000-3500. But as it says in this pdf at the end, they tested 3000m rated laptop at 10.000m and didn't produce a problem. At least not going there once.
Batteries: if they are Li-Ion, they should be OK. They could explode in theory though. The bigger concern is supposed to be low temperatures not altitude. But I read that modern batteries are a lot more prone to low temperatures, so keeping them warm under your clothes when not using them can help. Using V-lock batteries should be Ok I guess.
Seals, liquids, bearings, etc.: I read that you should use manual focusing, etc.. We only use cine manual lenses, so they should be ok. Liquid oils can freeze, so you can de-grese gear, but...
Condensation: gear gets cold. Later when you put it in warmer place they can get wet inside lenses, in batteries, media. So it is good to put it all out of the camera, until it is the same temperature as the surrounding. Also you should charge batteries when they have room temperature.
Media: HDD can not go higher than 3000m. SSDs don't have problems even above 10.000m. CFs are supposed to behave similar to SSDs.
And here is a video shot at the top of the Everest with 5DIII:
https://youtu.be/NhBzhi9jPFs
So yes, for P4K the biggest concern is actually screen, but even that should be ok at 3000+m. In theory, at temperatures quite under +40 and above 0 degrees Celsius.
And 2250 m has been already proved by Florent Piovesan (OfTwoLands). So Derek its your turn to hit the 3000m mark (: