Nikon Asia published this fascinating look at the durability testing procedures for their high end cameras. The video features the D850 and has lots of interesting tidbits in it, such as the fact that the camera is officially rated for a temperature range of 32 to 104°F, but they actually test far greater extremes than this. The camera is also covered in dust, subjected to drop tests and left in a special humidity test chamber among other things. I’m not a Nikon shooter myself but I still though this was fascinating and I don’t doubt that other manufacturers do similar things.
They don’t commit to an IP rating.
True. It would be great if camera manufacturers actually did that.
The Leica SL2 is IP54 rated.
Can I assume that these weatherproof capabilities are also in the D810?
I would imagine they are similar, but generally there are advancements between model generations. So the 810 might not be quite as good.