Sony's CFexpress cards will bring blistering speeds to cameras

CFExpress uses PCIe Gen tech like SD Express and MicroSD Express, but uses a larger, CompactFlash (CF) format. The SD Association recently announced that MicroSD Express cards would run at 985 MB/s, an incredible speed for a thumbnail-sized card. Other manufacturers like ProGradeDigital have also recently announced CFexpress card development.

Sony's CFexpress cards will bring blistering speeds to cameras 1

Panasonic’s S1 offers both CFexpress and UHS II support

The only cameras that really need that kind of speed are professional RAW cinema cameras from the likes of RED and Arri. Those models offer direct recording to SATA SSDs, but the new Sony CFexpress cards at least triple those speeds. While not as fast as the latest NVMe SSD drives, which can run at over 3,000 MB/s, they’re about as fast as external storage gets.

In fact, the cards are massive overkill for current consumer cameras like the Z6/Z7 and S1/S1R, which have maximum 4K video data rates (400 Mbps) around 35 times less than the cards can handle. It’s not likely to benefit burst RAW shooting much either, as that’s inherently limited by the camera’s buffer size.

Still, if you install one of these in a Z6 (once Nikon’s CFexpress firmware arrives), you’ll never worry about card speed again, though the cameras themselves may not support the max speeds. Sony said its first CFexpress cards will be available 128GB sizes, with 256 and 512GB versions to follow. The cards will also be tough, exceeding the CFexpress standard by a factor of three. There’s no price available yet, but they’ll likely cost more than XQD cards, which are already very expensive.

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