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Compact aluminum card reader with two CFast slots and short Thunderbolt cable

Sonnet Technologies

Sonnet Technologies SF3-2CFST dual-slot CFast 2.0 card reader Thunderbolt 3 40Gbps .5m cable

SKU CH-H3DC-4WYS7 MPN SF3-2CFST

Dual-slot CFast 2.0 reader with 40Gbps Thunderbolt 3 and .5m cable ingests two cards at up to 1000 MB/s

  • Interface typeThunderbolt 3
  • Product typeFlash Reader
  • In the boxSF3 Series - CFast 2.0 Pro Card Reader Thunderbolt 3 (40 Gbi
  • Ingest two CFast cards simultaneously at up to 1000 MB/s aggregate
  • 40Gbps Thunderbolt 3 interface with captive .5 meter cable
  • Bus powered through Thunderbolt connection, no adapter required
  • Rugged aluminum enclosure for reliable operation
  • Dual CFast 2.0 slots enable maximum-speed file transfer

Dual CFast 2.0 reader

The Sonnet SF3-2CFST is a Thunderbolt 3 card reader that accepts two CFast 2.0 cards at once. It draws power from the Thunderbolt connection so no external adapter is needed. The aluminium enclosure protects the slots during transport and studio use. It ships with a captive .5 metre Thunderbolt 3 cable.

1000 MB/s aggregate throughput

Two slots operate simultaneously and can reach up to 1000 MB/s combined ingest speed. The 40Gbps Thunderbolt 3 interface feeds that bandwidth straight to the host without a separate power brick. The user-replaceable .5 metre cable keeps the link short and reliable.

Suits dual-card workflows

Video crews and photographers who offload pairs of CFast cards in one pass will save time. Users with only single-card offload needs or systems lacking Thunderbolt 3 ports should consider a simpler single-slot reader instead.

How it compares

Measured against everything we stock in USB & Internal Card Readers, at today’s prices. Recalculated every night.

Price $161.99
Pricier than about 91% of the 511 comparable items (median $18.99).

Specifications

Product
Brand nameSonnet
Product lineSF3
Product typeFlash Reader
Ports & slots
Interface typeThunderbolt 3
Size & build
Shipping weight0.91 kg
Package size305 × 229 × 102 mm
In the box
In the boxSF3 Series - CFast 2.0 Pro Card Reader
Thunderbolt 3 (40 Gbit/s) Cable

Questions about this item

What does the 1,000 MB/s aggregate figure mean when I am ingesting footage?

It means both CFast 2.0 slots can transfer data at the same time up to that combined rate, so two cards are offloaded in parallel rather than one after the other.

What does the Thunderbolt 3 40Gbps interface cap in practice?

The 40Gbps link provides enough bandwidth for the dual-slot reader to sustain its 1,000 MB/s aggregate throughput without bottlenecking the transfer.

What does the reader need to fit on my desk or in a rack?

The aluminum enclosure is bus-powered over Thunderbolt 3 and ships with a captive 0.5 m cable, so it only needs a free Thunderbolt 3 port and a small flat surface.

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