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Maximum CFast.
Times Two.

SF3 Series - CFast 2.0 Pro Card Reader
Professional Thunderbolt Dual-Slot Reader for Fast, Simultaneous CFast 2.0 Media Ingest
for Mac and Windows

Supports CFast 2.0 Cards at Maximum Speed
Superior Dual-Slot Ingest Performance
With the popularity of professional digital cinema cameras from RED, Canon, ARRI, and Blackmagic Design, the use of CFast 2.0 memory cards has soared, and the need for a truly high-speed card reader is undeniable. With CFast 2.0 cards’ rated read speeds near 550 MB/s, it’s clear that USB readers don’t fill that need. Sonnet’s SF3™ Series - CFast 2.0 Pro Card Reader does. Equipped with a high-bandwidth Thunderbolt™ interface, this professional media card reader enables ultra-fast transfer of footage from CFast memory cards to your computer — delivering speeds as fast as the cards allow.


Dual-Slot Ingest at Maximum Read Speeds
Read Up to 1000+ MB/s
Enables simultaneous ingest of files from two cards up to 1000+ MB/s aggregate.
Key Features

Superior Ingest Performance
Ingests footage from CFast 2.0 cards at up to maximum supported speeds. Simultaneously ingest from two cards at full peed.

Dual CFast 2.0 Slots
Enable simultaneous ingest of files from two cards up to 1000+ MB/s aggregate.

Maximum Thunderbolt Performance
Pro media card reader provides four lanes of PCIe bandwidth for maximum performance.

Compact, Rugged, Stackable
Small and rugged aluminum enclosure for reliable operation; design enables multiple SF3 Series card readers to occupy same footprint.

Rackable
Threaded mount points enable secure attachment of two readers side-by-side on a rack tray in just 1U of rack space.

Bus-Powered, Energy Efficent
Powered through its Thunderbolt connection, the SF3 Series - CFast 2.0 Pro Card Reader requires no power adapter.

Computer Compatibility
Compatible with Mac and Windows. See Tech Specs for details.

Dual CFast Slots
Ingest from Two Cards at Same Time
As the industry’s first CFast 2.0 card reader for Thunderbolt, Sonnet’s CFast 2.0 card reader employs its dual card slots to take advantage of the tremendous bandwidth offered by Thunderbolt technology. This CFast 2.0 reader is capable of ingesting media files simultaneously from two cards at concurrent data transfer speeds up to 1000+ MB/s — more than double the average ingest speed of USB 3.0 card readers — using the Sonnet reader makes for a significantly more convenient and efficient workflow.

Bus-Powered
No Power Adapters Required
SF3 Series - CFast 2.0 Pro Card Reader connects directly to your Mac or Windows computer’s Thunderbolt port or at the end of a Thunderbolt device chain. Requiring only a single cable to connect to your computer, this high-performance Sonnet reader is bus powered (no separate power supply required).
Ready to Rack. Perfectly Portable.
Designed for DIT Workflows
Sonnet’s SF3 Series Professional Media Card Readers include threaded mount points that enable you to securely attach two readers side-by-side on a rack tray in just 1U of rack space.
On the Road Travel Compansion
Portable, Rugged, Stackable
Measuring a compact 5.8 inches wide by 1 inch high by 3.5 inches deep, Sonnet’s CFast 2.0 card reader is suitable for use in any workspace, even where space is tight. The reader’s shell is made from extruded aluminum, making it lightweight, and yet rugged enough to be transported in an equipment bag without fear of damaging the case.
Sonnet SF3 Series Pro Card Readers
Designed to be Stacked and Daisy Chained
SF3 Series Professional Media Card Readers feature rugged aluminum enclosures designed to be stacked and daisy chained, enabling multiple AJA PAK Media, CFast 2.0, CFexpress, RED MINI-MAG, and SxS PRO X readers to occupy the same footprint, while connecting to your computer through a single cable. You can take advantage of Thunderbolt’s up to 2800 MB/s of PCIe 3.0 x4 bandwidth to ingest four, six, or more cards simultaneously!

Cable Built-in
Never Lose It. Easily Replaceable.
Through the use of a captive cable, SF3 Series - CFast 2.0 Pro Card Reader’s Thunderbolt cable remains firmly connected to it at all times. Should the cable ever break, it can easily be replaced with an approved replacement cable available from Sonnet or a Sonnet-authorized service center.

Built for the Fast Lane
Designed for the Fastest Connection to Thunderbolt Computers
SF3 Series Professional Media Card Readers are purposely designed with a Thunderbolt 3 controller and its four lanes of PCIe (not available in a Thunderbolt 4 peripheral) to achieve maximum simultaneous ingest speeds. Watch this video to learn more about the performance benefits.
| Mac Compatibility | Mac with Thunderbolt 5, Thunderbolt 4, Thunderbolt/USB4, or Thunderbolt 3 ports; macOS 15+; compatible with macOS 27 | Windows Compatibility | Windows computer with Thunderbolt 5, Thunderbolt 4, or USB4 ports; Windows 11 25H2+ |
| Supported Media | CFast; CFast 2.0 (2)(3) | Part Number | SF3-2CFST |
| Warranty | 2 Years | Form Factor | Portable Card Reader |
| Bus Interface | 40 Gbps Thunderbolt | External Connectors | Two CFast Slots |
| Operating Temperatures | 0°C to 35°C (32°F to 95°F) | Dimensions (W x D x H) | 5.8 x 3.5 x 1 in. (145 x 89 x 25 mm) |
| Weight | Reader: 0.35 lbs (0.16 kg); Complete Package: 0.60 lbs (0.27 kg) | Package Contents | SF3 Series - CFast 2.0 Pro Card Reader (with captive 0.5-meter Thunderbolt cable); Documentation |
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