CFast | Lexar

Category: CFast



What is the CFast™ format?

CFast is the latest evolution of card format from the CompactFlash Association and provides a higher maximum transfer rate than CompactFlash® cards. CFast cards are similar in size to CompactFlash cards, but do not have any pins which can bend in the connector. The format was primarily designed to support the capabilities of next-generation of camcorders and DSLR cameras.

Are CFast cards compatible with compactflash cameras?

No. Despite physical similarities, CFast cards are not compatible with CompactFlash devices.

How fast is the Lexar Professional 3500x CFast 2.0 card?

The Lexar Professional 3500x CFast 2.0 card delivers a read transfer speed up to 3500x (525MB/s), which is three times faster than today’s fastest CompactFlash cards.* The card leverages these new speed thresholds to allow you to capture, store, and transfer high-quality photos and 1080p full-HD, 3D, and 4K video. *Up to 525MB/s read transfer, write speeds lower. Speeds based on internal testing. Actual performance may vary. x=150KB/s. 3x faster claim based on reported CompactFlash speed specification.

Why are cards going to faster standards?

The development of technologies like XQD™ and CFast™ address the increasing capabilities of today’s cameras, as well as the ever-growing demands placed on professional photographers and videographers.

Is there a Lexar card reader that works with this card?

Yes. The card is designed to leverage next-generation Thunderbolt 2 speeds when used with the Professional Workflow CR2 reader (as well as the Professional Workflow HR2 hub). The card also works with the Professional Workflow CR1 reader and Professional Workflow HR1 hub (both at USB 3.0 speeds).

What devices work with this card?

Canon and Phase One have announced support for the CFast card format, so you can expect to see cameras from them in the future.

What is the best way to optimize my CFast card?

From time to time, it’s recommended to refresh your CFast card for maximum performance. Please go to to download our CFast Refresh Tool.

Lexar CFast card compatibility