UPDATE: the Sony XQD card tests fine, putting suspicion onto the Panasonic S1R.
I’ve been using my 256GB Sony QXD card in my Nikon D850 and twice when testing the Nikon Z7 with zero errors—ever. As in no issues ever. [update: testing shows it to be a bad card, so I guess things go bad over time]
On my first shoot with the Panasonic S1R, it destroyed three images by truncating them to partial size. Similar errors occurred on other shoots, though not frequently (perhaps 1 exposure in 100).
To its credit it displays “card write error”. But it leaves the damaged file in place and plays it back with no mention of any issue! Back on the computer, the raw file is useless; all the camera is doing is displaying the embedded JPEG.
But I cannot believe that this 256GB Sony XQD card has an issue, as it it has never had any errors in Nikon cameras.
Methinks that at the least Panasonic has a compatibility issue, and maybe something worse.
Reader James K writes:
Just what you don’t want to see on a new $5500 camera. Wedding guys will love this problem. It’s the “never know when” boogyman. The last thing you need is that haunting feeling that you can’t really trust the machine.
Maybe Sony sprinkled a little special recipe secret sauce on the QXD cards to give the new Panasonic buyers a bitter first taste of their new delicacy.
DIGLOYD: indeed. I was able to re-shoot the affected frames (since the camera gave its warning), but that is hardly an option for some shooting environments where moment don’t get repeated.