ajfotofilmagem said:
dgatwood said:
nebugeater said:
What is the best "guess" on cards. CF .. SD .. or both?
My guess would be twin SD. CF is on its way out, CFast is pretty much stillborn, and I doubt we'll see XQD any time soon except maybe in cinema cameras.
CFast card is still very recent, and after its emergence were not pro DSLR cameras released, but other film companies already manufacture compatible devices.
Recent by human standards, perhaps, but as standards go, CFast is a dinosaur. The SDHC/SDXC UHS-I standard moved from specification to DSLR adoption in barely two years, and that was a couple of years ago. By contrast, the CFast standard was released more than six years ago (two years before UHS-I) and still hasn't been adopted in much of anything yet. By consumer electronics standards, that's generally considered a failure to launch.
Also, it seems to be the general consensus of the computer industry that the use of SATA for flash is entirely the wrong design from a performance perspective, and I'd expect the camera industry to follow their lead in the matter. With CFast, you're unnecessarily converting data from a PCIe bus to SATA and back to a raw address bus for no good reason. That's a lot of overhead for no real benefit. Unlike external flash-based disk drives, CFast doesn't try to maintain backwards compatibility with existing ATA-based CF cards or readers, so there's no real advantage to using SATA over PCIe-attached flash (e.g. XQD), and the latter is a lot simpler and is likely to have fewer performance bottlenecks.
From what I've read, XQD adoption is already ahead of CFast despite being announced about three years later, though to be fair, adoption of either standard qualifies as glacial by consumer electronics standards, primarily because there's little need for that much speed yet, at least for stills.
We might eventually see XQD in a still camera, but I'd be surprised if CFast doesn't wither on the vine; there might be a couple of years worth of viability in the high-end video arena before XQD thoroughly stomps it into the ground, but that's probably the extent of its future.
ajfotofilmagem said:
Moreover, XQD cards are already on the market for 2 years and so far only Sony and Nikon have compatible devices. Sony has a tradition of making your own media, incompatible with other manufacturers (purposely), and abandoning its users after a few years, and I never buy a XQD card.
XQD is an official standard from the CompactFlash Association, so for once Sony isn't being (too) evil.

To the extent that Canon is paying lip service to supporting CFast, they're seriously backing the wrong horse. I'm pretty sure that literally nobody else in the entire electronics industry other than SanDisk, Canon, Phase One, and Arri think that SATA has any future whatsoever in the world of flash storage.