The 32.5 megapixel full-frame Canon EOS R6 III features dual memory card slots.
Slot 1 is compatible with CFexpress Type B cards (up to 8TB in size) and slot 2 is compatible with SD/SDHC/SDXC (UHS-II / UHS-I) cards.
For recording 7K video internally at up to 59.94p in 12-bit Canon RAW Light Movie a CFexpress Card is required and we would recommend one that is VPG 400 certified.
Table of Contents[Hide][Show]
Best CFexpress Type B Memory Cards
Although we have not had chance to test our extensive CFexpress Type B collection in the R6 Mark III yet, we have tested them in the R5 and R3 so have a pretty good idea which cards to recommend based on their in-camera performance and reliability.
| CFexpress Type B Memory Card | Minimum Sustained Write Speed | Max Write Speed | Max Read Speed | Video Rating | CFexpress Standard | Price Check |
|---|---|---|---|---|---|---|
| Delkin Devices BLACK 4.0 | 2040 MB/s | 3200 MB/s | 3600 MB/s | VPG400 | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| Delkin Devices POWER 4.0 | 820 MB/s | 3240 MB/s | 3650 MB/s | NA | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| Lexar Professional DIAMOND 4.0 | 3200 MB/s | 3400 MB/s | 3700 MB/s | VPG400 | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| SanDisk PRO-CINEMA | 1400 MB/s | 1500 MB/s | 1700 MB/s | NA | 2.0 | B&H Photo | Amazon |
| Nextorage NX-B2 PRO Series | 3400 MB/s | 3600 MB/s | 3900 MB/s | VPG400 | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| Delkin Devices POWER G4 | 805 MB/s | 1700 MB/s | 1780 MB/s | NA | 2.0 | B&H Photo | Amazon | Memory Wolf UK |
| Angelbird 512GB AV PRO SE v4 | 1050 MB/s | 1100 MB/s | 3700 MB/s | NA | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| Lexar Professional GOLD 4.0 | 3000 MB/s | 3300 MB/s | 3600 MB/s | NA | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| Lexar Professional SILVER 4.0 | 2600 MB/s | 3000 MB/s | 3600 MB/s | NA | 4.0 | B&H Photo | Amazon | Memory Wolf UK |
| Novachips Express | 1000 MB/s | 1000 MB/s | 1700 MB/s | NA | 2.0 | Amazon |
| Novachips Extreme | 1600 MB/s | 1600 MB/s | 1700 MB/s | NA | 2.0 | Amazon |
| ProGrade Digital 4.0 Gold | 850 MB/s | 3000 MB/s | 3400 MB/s | NA | 4.0 | B&H Photo | Amazon |
| Nextorage NX-B2 SE Series | 800 MB/s | 1900 MB/s | 1950 MB/s | NA | 2.0 | B&H Photo | Amazon |
| ProGrade Digital 4.0 Iridium | 850 MB/s | 3000 MB/s | 3550 MB/s | VPG400 | 4.0 | B&H Photo | Amazon |
| SanDisk Extreme PRO | NA | 1200 MB/s | 1700 MB/s | NA | 2.0 | B&H Photo | Amazon | Memory Wolf UK |
| OWC Atlas Pro 4.0 | 400 MB/s | 1700 MB/s | 1850 MB/s | VPG200 | 4.0 | B&H Photo | Amazon |
| OWC Atlas Ultra | 1300 MB/s | 1500 MB/s | 1700 MB/s | NA | 2.0 | B&H Photo | Amazon |
| PERGEAR CFE-B 4.0 | 800 MB/s | 3400 MB/s | 3500 MB/s | NA | 4.0 | Pergear |
| Exascend Essential Series | NA | 1680 MB/s | 1700 MB/s | NA | 2.0 | B&H Photo | Amazon |
| Sony TOUGH CEB-G | NA | 1600 MB/s | 1850 MB/s | NA | 2.0 | B&H Photo | Amazon | Memory Wolf UK |
| Wise Advanced CFX-B Series | 800 MB/s | 2600 MB/s | 3400 MB/s | NA | 4.0 | B&H Photo |
Best UHS-II SD/SDHC/SDXC Memory Cards
We have not had chance to test our extensive UHS-II SD card collection in the R6 Mark III yet, but we have tested them in the R6 Mark II. Therefore we have a pretty good idea which cards to recommend based on their in-camera performance and reliability.
We’ve provided the buffer clearing times for the R6 Mark II below, these will be updated with the R6 III results once we’ve had the opportunity to test the camera.
| UHS-II SD Memory Card | Max Write Speed | Max Read Speed | Buffer Clearing Time in R6 II | Video Speed Class | Price Check |
|---|---|---|---|---|---|
| Nextorage NX-F2PRO Series | 299 MB/s | 300 MB/s | 12.38s | V90 | B&H Photo | Amazon |
| Sony SF-G Tough | 299 MB/s | 300 MB/s | 12.88s | V90 | B&H Photo | Amazon | Memory Wolf UK |
| Delkin Devices BLACK | 250 MB/s | 300 MB/s | 13.18s | V90 | B&H Photo | Memory Wolf UK |
| Kingston Canvas React Plus | 260 MB/s | 300 MB/s | 13.26s | V90 | B&H Photo | Amazon | Memory Wolf UK |
| PNY X-PRO 90 | 280 MB/s | 300 MB/s | 13.61s | V90 | Amazon |
| Ritzgear Video Pro | 250 MB/s | 280 MB/s | 14.01s | V90 | Amazon |
| Transcend SD 700S | 180 MB/s | 285 MB/s | 14.08s | V90 | B&H Photo |
| Lexar Professional 2000X | 260 MB/s | 300 MB/s | 14.09s | V90 | B&H Photo | Amazon | Memory Wolf UK |
| OWC Atlas Ultra | 250 MB/s | 300 MB/s | 14.23s | V90 | B&H Photo | Amazon |
| Delkin Devices POWER | 250 MB/s | 300 MB/s | 14.86s | V90 | B&H Photo | Amazon |
| SanDisk Extreme Pro | 260 MB/s | 300 MB/s | 14.86s | V90 | B&H Photo | Amazon | Memory Wolf UK |
| Integral UltimaPro X2 | 280 MB/s | 300 MB/s | 14.91s | V90 | Amazon |
| ProGrade V90 | 275 MB/s | 300 MB/s | 15.30s | V90 | B&H Photo | Amazon |
| Exascend Catalyst | 280 MB/s | 300 MB/s | 15.30s | V90 | B&H Photo | Amazon |
| Nextorage NX-F2SE Series | 150 MB/s | 280 MB/s | 19.63s | V60 | B&H Photo | Amazon |
| Sony SF-M Tough | 150 MB/s | 277 MB/s | 24.50s | V60 | B&H Photo | Amazon | Memory Wolf UK |
| Sony SF-M | 150 MB/s | 277 MB/s | 24.50s | V60 | B&H Photo | Amazon |
| ProGrade V60 | 130 MB/s | 250 MB/s | 27.01s | V60 | Amazon |
| Angelbird AV Pro MK2 V60 | 160 MB/s | 280 MB/s | 35.23s | V60 | B&H Photo | Amazon | Memory Wolf UK |
| Lexar Professional 1667X | 120 MB/s | 250 MB/s | 36.03s | V60 | B&H Photo | Amazon | Memory Wolf UK |
| Angelbird AV Pro Mk 2 V90 | 280 MB/s | 300 MB/s | 41.06s | V90 | B&H Photo | Amazon | Memory Wolf UK |
| Sony SF-E | 45 MB/s | 270 MB/s | 49.72s | V60 | B&H Photo | Amazon | Memory Wolf UK |
Compatible Memory Cards
The Canon EOS R6 III has two memory cards slots. Slot 1 supports CFexpress Type B Memory Cards and Slot 2 supports SD/SDHC/SDXC UHS-I and UHS-II memory cards.
Here are the theoretical maximum speeds of each card type:
- CFexpress Type-B: theoretical maximum transfer speeds of up to 4000MB/s
- UHS-II: theoretical maximum transfer speeds of up to 312MB/s
CFexpress-Type B cards will clear the buffer much faster than SD cards and are therefore ideal for shooting bursts of images. You’ll also need a fast CFexpress card if you want to record 7k video internally.
If you primarily shoot single shots and no video then the slower UHS-II cards will probably meet your needs and save you a few pennies, although some CFexpress Type B cards are now cheaper than SD cards.
Even if you won’t benefit from using a CFexpress card whilst shooting, you will definitely benefit from the much faster read times when copying files over to your computer.
Recording to Multiple Cards
If you select the record option in the menu “Rec. to Multiple” then the same image type will be written to the memory card in both slot 1 and slot 2.
Unfortunately the write speed will always be limited by the slowest card, so you will be limited by the speed of the UHS-II card that you choose for slot 2.
Recording Separately
If you select the record option in the menu “Rec. Separately” then you can write a different image type to slot 1 and slot 2.
For the best performance we recommend recording the larger RAW or CRAW images to the faster CFexpress Type-B card in slot 1 and JPEGs to a UHS-II card in slot 2 and not the other way around.
Memory Cards for Recording Video
For recording 7K video internally at up to 59.94p in 12-bit Canon RAW Light Movie a CFexpress Card is required and we would recommend one that is VPG 400 certified. The Delkin Devices BLACK 4.0 is a great choice.
What Size Memory Card Do You Need?
The size of memory card that you choose will depend on how and what you are shooting.
Photographers
We would recommend a minimum of 256GB if you shoot a lot of continuous bursts.
Videographers
We would recommend a minimum of 512GB for shooting video. We don’t recommend using 32GB or smaller SDHC cards (either UHS-I or UHS-II) because they use the FAT 32 file system and your video files will be broken up into 4GB chunks.
Memory Card Readers
If you prefer to remove the card from your camera and use a reader to copy over the files to your computer, then here are a couple of options to consider.
ProGrade Digital CFexpress 2.0 Type B & UHS-II Card Reader
This ProGrade Card Reader includes both a CFexpress Type B (2.0) slot and a UHS-II SDXC slot.
It supports transfer speeds of up to 10 GB/s via a USB Type-C interface (USB 3.2 Gen 2).
Both Windows and Mac are supported and 18″ USB Type-C to Type-C and Type-C to Type-A cables are included.
ProGrade Digital CFexpress Type B USB 4.0 Single-Slot Card Reader
The ProGrade Digital CFexpress Type B USB 4.0 Single-Slot Card Reader delivers a high-speed workflow designed to keep up with the performance of the latest CFexpress Type B 4.0 memory cards.
It features a single CFexpress 4.0 Type B slot and leverages the 40 Gb/s USB 4.0 interface to achieve transfer speeds of up to 5 GB/s (5000 MB/s).
An integrated LED indicator shows when data transfers are in progress, while a magnetic base—secured with the included metal plate keeps the reader firmly attached to your Windows or Mac system. A USB 4.0 cable is also included.
FAQs
SDHC cards use the FAT32 file system and can store up to 32 GB of data, while SDXC cards use the exFAT file system and can store up to 2 terabytes (2000 GB). If you shoot video with a SDHC card your video file will be broken up into 4GB chunks.
Two memory card slots. Slot one supports CFexpress Type-B Cards and Slot 2 supports SD/SDHC/SDXC UHS-I and UHS-II memory cards.
CFexpress Type-B cards in Slot 1 and SD/SDHC/SDXC UHS-I and UHS-II memory cards in Slot 2.
Leave a Reply