Not just A7R3 but any Sony camera doesnt go well with humid weather, even A9 falls in this category.Talys said:Interesting article, thanks for sharing it
The takeaway is that if you own an A7RII/III, keep it out of the rain and definitely away from the shoreline (where there might be a mist of salt water). That was only two 15 minute tests -- if you were out there for hours, the Sony would probably be toast. It was particularly bad that the water got into the shutter blades, battery compartment and basically everything else inside.
If I owned an A7RIII and it got water in it to the degree shown in the article, I'd send it in to be serviced by Sony before using it again. In my opinion, the potential for fires with lithium batteries is just too high. Plus, there may be cavities where water can enter, but which not particularly exposed and are problematic for evaporation.