The Canon 5D Mark IV shoots 7 fps continuous RAW at up to 21 megapixels, which puts meaningful demand on its CompactFlash slot. A slow CF card becomes the limiting factor for burst depth and buffer recovery, which costs you shots at critical moments. All five picks below are UDMA 7 rated and verified for compatibility with the 5D Mark IV, covering different priorities from maximum write speed to high capacity.
| Product | Best For | Rating |
|---|---|---|
| SanDisk Extreme Pro 64GB | All-round 5D IV shooting | 4.8/5 |
| Lexar Professional 1066x 128GB | High-volume event work | 4.7/5 |
| ProGrade Digital UDMA 7 64GB | Sustained write performance | 4.6/5 |
| Angelbird AV PRO CF 64GB | 4K video recording | 4.6/5 |
| Delkin Devices Power 64GB | Value UDMA 7 option | 4.4/5 |
SanDisk Extreme Pro 64GB - Best All-Round Pick for the 5D Mark IV
The SanDisk Extreme Pro CF is the most widely recommended card for Canon DSLRs with CF slots, and the 5D Mark IV is no exception. At UDMA 7 with read speeds of 160 MB/s and write speeds of 150 MB/s, it handles the camera’s burst mode cleanly and clears the buffer faster than competing options at similar prices. The lifetime warranty and included RescuePRO data recovery software make this the lowest-risk card for professional use. Physical durability ratings cover waterproofing, shock resistance, and X-ray exposure. The 64GB capacity is sufficient for a full sporting event or wedding day without card swaps.
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Lexar Professional 1066x 128GB - Best for High-Volume Shooting
When the priority is maximum capacity over a full day shoot, the Lexar 1066x 128GB delivers UDMA 7 speeds in a card that holds enough data for extensive wedding or wildlife coverage. Read speed is specified at up to 160 MB/s and write at 155 MB/s, keeping pace with the 5D Mark IV’s burst output. The larger capacity does introduce more data at risk per card, so pairing with a redundant backup workflow is recommended. Lexar offers image rescue software and has a strong track record for card reliability across Canon professional bodies.
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ProGrade Digital UDMA 7 64GB - Best Sustained Write Consistency
ProGrade Digital focuses specifically on professional imaging media, and the UDMA 7 CF card is engineered for sustained rather than peak write performance. This distinction matters for extended burst sequences: where some cards show write speed decay after the first few seconds, ProGrade maintains more consistent throughput. Read speed reaches up to 130 MB/s with write speeds spec’d at 130 MB/s sustained. The card comes with a QR-linked speed verification tool so you can confirm actual performance on your specific body. At around 65 dollars it is priced competitively against SanDisk while offering professional-grade build quality.
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Angelbird AV PRO CF 64GB - Best for 4K Video on the 5D Mark IV
The 5D Mark IV shoots 4K Motion JPEG at high bitrates, and the Angelbird AV PRO CF is specifically designed for sustained video writes. Its sustained write speed of up to 160 MB/s is specified under thermal load conditions, not just peak bench conditions, which is what matters when recording a long video sequence. Angelbird is an Austrian manufacturer with a reputation for conservative, honest speed specifications. This card is the right choice if your primary use of the 5D Mark IV is video production rather than photography burst work.
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Delkin Devices Power 64GB - Best Value UDMA 7 Card
Delkin’s Power series CF card targets UDMA 7 performance at a price point slightly below the SanDisk flagship. Read speeds reach 150 MB/s and write speeds are specified at 100 MB/s, which is adequate for burst shooting on the 5D Mark IV at moderate sequence lengths. Delkin backs the Power series with a lifetime warranty and offers free data recovery through partner services, matching the support level of more expensive alternatives. At around 58 dollars it is the recommended option for photographers who want UDMA 7 reliability without paying the SanDisk premium.
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How to Choose a CF Card for the Canon 5D Mark IV
Prioritise cards rated UDMA 7. the 5D Mark IV supports the standard and will use it. Write speed is more important than read speed for burst shooting: look for sustained write ratings above 130 MB/s to keep buffer recovery times short. For 4K video, check that the card specifies sustained rather than peak write performance, since video recording maintains a constant write load for extended periods. Capacity of 64-128GB covers most full-day professional shoots. Stick with brands that offer lifetime warranties and data recovery options, as no storage medium is entirely failure-proof. Avoid non-name CF cards regardless of advertised speed ratings.
For more Canon gear guidance, see our comparison of best compact cameras for beginners and best compact flash cards. Review our testing standards at /methodology.
Frequently asked questions
What CF card spec does the Canon 5D Mark IV require?+
The Canon 5D Mark IV supports UDMA 7 CompactFlash cards and benefits most from cards with sustained write speeds above 130 MB/s. At 7 fps with full-resolution RAW files averaging 30 MB each, the camera writes roughly 210 MB per second during burst sequences, so write speed is the critical spec to watch.
Does the Canon 5D Mark IV use CFexpress cards?+
No. The 5D Mark IV uses the standard CompactFlash interface, which is not compatible with CFexpress Type B cards. Its dual card slots accept CompactFlash in slot 1 and SD (UHS-II) in slot 2. CFexpress is only available on Canon bodies with the newer CFexpress Type B slot, such as the EOS-1D X Mark III.