The Canon EOS R1 is a 24.2 megapixel full-frame (36 x 24 mm) stacked sensor mirrorless camera that features two memory card slots, both slots support CFexpress Type B cards up to 2TB in size.
We would strongly recommend using the same card in both card slots and not mixing different brands or card speeds, especially if recording to both cards simultaneously. New cards should also be formatted in-camera before first use.
Recommended CFexpress Type B Cards
Our top recommended CFexpress Type B cards based on speed and reliability for the Canon R1 are:
| CFexpress Type B Memory Card | Min Sustained Write Speed | Max Write Speed | Max Read Speed | Video Rating | CFexpress Standard |
|---|---|---|---|---|---|
| Delkin Devices BLACK 4.0 | 2040 MB/s | 3200 MB/s | 3600 MB/s | VPG400 | 4.0 |
| Delkin Devices POWER 4.0 | 820 MB/s | 3240 MB/s | 3650 MB/s | NA | 4.0 |
| Angelbird AV PRO SE v4 | 1050 MB/s | 1100 MB/s | 3700 MB/s | NA | 4.0 |
| SanDisk PRO-CINEMA | 1400 MB/s | 1500 MB/s | 1700 MB/s | NA | 2.0 |
| Lexar Professional DIAMOND 4.0 | 3200 MB/s | 3400 MB/s | 3700 MB/s | VPG400 | 4.0 |
| Nextorage NX-B2 PRO | 3400 MB/s | 3600 MB/s | 3900 MB/s | VPG400 | 4.0 |
| Delkin Devices POWER G4 | 805 MB/s | 1700 MB/s | 1780 MB/s | NA | 2.0 |
| Lexar Professional GOLD 4.0 | 3000 MB/s | 3300 MB/s | 3600 MB/s | NA | 4.0 |
| Lexar Professional SILVER 4.0 | 2600 MB/s | 3000 MB/s | 3600 MB/s | NA | 4.0 |
| ProGrade Digital 4.0 Gold | 850 MB/s | 3000 MB/s | 3400 MB/s | NA | 4.0 |
|
ProGrade Digital 4.0 Iridium |
850 MB/s | 3000 MB/s | 3550 MB/s | VPG400 | 4.0 |
| Sony CEB-G | NA | 1600 MB/s | 1850 MB/s | NA | 2.0 |
| SanDisk Extreme PRO | NA | 1200 MB/s | 1700 MB/s | NA | 2.0 |
FAQs
What's the maximum size memory card supported by the R1?
The Canon R1 supports a maximum size of 2TB in each of its CFexpress Type B card slots.
How many images can be stored on a 325GB card?
The number of images that can be stored on a 325GB memory card in the R1 varies based on the image type that you are recording in. The following values are approximate because file size varies with the scene being shot:
- JPEG L: 37930
- HEIF L: 37720
- RAW: 11530
- CRAW: 25520
- RAW + JPEG L: 8840
- CRAW + JPEG L: 15250
- RAW + HEIF L: 8230
- CRAW + HEIF L: 13520
Is a VPG400 rated CFexpress Type B card required for video?
We would recommend a CFexpress Type B card that is VPG 400 certified for video recording. This guarantees a minimum sustained write speed of 400 MB/s which is fast enough to support shooting 6K RAW (59.97p/50p): Approx. 2600 Mbps (325 MB/s). This is the most demanding video recording option for the R1.
Are CFexpress Type B 4.0 cards compatible with the R1?
Yes, the R1 is compatible with CFexpress 4.0 cards because the 4.0 standard is backward compatible with 2.0. Unfortunately in-camera there is no speed benefit to using a 4.0 card over a 2.0 card because the R1 memory bus does not support the faster 4.0 speeds. Where you will see a benefit is when copying files from your memory card to your computer, with a 4.0 card this can be up to twice as fast compared to a 2.0 card when using a CFexpress 4.0 Type B compatible reader.
Are CFexpress Type A cards compatible with the R1?
No. The Canon R1 is not compatible with the physically smaller CFexpress Type A cards, only Type B cards are supported.
What is the difference between CFexpress Type B 2.0 and 4.0?
The main difference is speed. CFexpress Type B 4.0 cards utilize the PCIe Gen 4 bus which delivers twice the bandwidth (up to 4 GB/s) compared to CFexpress 2.0 Type B cards that utilize the PCIe Gen 3 bus (up to 2 GB/s).
CFexpress Type B 4.0 cards are backward compatible with CFexpress 2.0 devices, meaning a 4.0 card will work in a 2.0 camera or reader, but the performance will be limited to CFexpress 2.0 speeds. Similarly, a CFexpress 2.0 card will perform at its peak in a CFexpress 4.0 device.
Where can you find the Canon R1 specifications?
Full specifications for the Canon R1 can be found on Canon's website.
