cjc2 Loc: Hellertown PA

The D850 pretty much demands the speed of XQD. While I would highly recommend Lexar, I would expect them to be scarce. Sony would be my second choice. Best of luck.

larryepage Loc: North Texas area

It depends on your shooting interval. Once a second might eventually be a problem. But slower should work fine to a fast SD catd, in my experience, even if shooting raw. But then in mind, it would be pretty silly to shoot raw time lapse in most cases, rather than properly set up jpegs. I'm sure there are counterexamples that I haven't thought of.

rgrenaderphoto Loc: Hollywood, CA

That is not how non volatile memory works. You can't wear out the first 25% of the chips,

larryepage Loc: North Texas area

It's exactly how those cards work. The count of cumulative writes to a location increase the probability of failure of that location. Cards should be selected to match usage patterns, ideally filling to 80 or 90% of capacity each time before being downloaded.

I built semiconductor devices for 15 years. Volatile memory wears out bit by bit as they are written to.

Julian Loc: Sarasota, FL

Thank you for taking the time.

Julian Loc: Sarasota, FL

Thank you.

joehel2 Loc: Cherry Hill, NJ

Thanks, Larry; you’re right you would be using jpegs for the time lapse in most cases.

larryepage Loc: North Texas area

I didn't see clearly what I was responding to. The whole chip fails but it will fail as the result of writing to a small area. Sorry. Guess I'm going to have to wait a little later in the day to start responding to posts...

Geegnome

Hello. I recently followed a similar track, having sold my D750. At first I agonized over which XQD to acquire and used a fairly fast sdhc while deciding. I ended up getting a Sony120 gb (440mb/s read & 400 mb/s write). I searched relentlessly for a best/better price option. In looking at options, I found there are two different versions of this particular card. One has the name "Sony" at the top, or contact end. The one I finally bought has "XQD" at the top. This distinction was, at first, lost on me until I realized some of the cards with the "Sony" mark at the business end listed on B&H and other sites were noted as "discontinued."

I remain ignorant of what that might mean in terms of performance, but opted for the non-discontinued version. I also read that users of one or more of the other brands had some difficulties.

While the sd card worked fine, it was as might be expected, a little slow for my D850. The Sony card is very fast transferring those big files quick was a wink.

Hope this is helpful.