I have now had 3 occurrences of the same thing happening, with two different cameras, my Nikon D90 and Nikon D800e, that I am concerned about, don't understand, and need some info about.
The first occurrence happened while close to the exit of the archaeological site of Pompeii, the second, while at the Vatican, and the third at a craft workshop in Siem Reap, Cambodia.
Today, while at the craft workshop and using my D800e, my camera stopped working for no apparent reason in a room where they were making copper molds. I walked through additional rooms where they were carving soapstone and sandstone sculptures, and the camera would not operate (batteries fully charged). At the workshop were mostly hand tools being used, but I did see some electrical equipment as well. Once out of the workshop area, I was able to turn my camera back on and everything seemed just fine.
At Pompeii, and this was 3 years ago so I can't remember everything, my SD card became damaged as I was about to exit the grounds of the archaeological site, and at the Vatican, same trip as Pompeii (and both with my D90) I lost all the photos from both SanDisk cards.
My thought today was that there was some electrostatic charge that I encountered, but that is just a guess. I didn't lose any photos off my Lexar Professional 1000x 32 GB compact flash UDMA7 card at the workshop, whereas 3 years ago, I did lose my photos off my two SanDisk cards. Any ideas or suggestions?
Is more information needed? Thanks, in advance for any insight into what might be the cause.